Developing box

Abstract

The utility model discloses a developing box, which can be detachably mounted in a drum box with a photosensitive drum, and comprises a shell, a driving device and a driving device, a developing roller; an input gear; a chip; a first protrusion capable of receiving a force outside the developing cartridge to move the developing roller from the first position to the second position; the developing roller is provided with a developing roller surface, the photosensitive drum is provided with a photosensitive drum surface, and the developing roller surface is provided with a first part located on the first side of the shell and a second part located on the second side of the shell in the first direction in the first direction; when the developing roller is located at the second position, a first distance is formed between the first part and the surface of the photosensitive drum, a second distance is formed between the second part and the surface of the photosensitive drum, and the first distance is different from the second distance; according to the developing box disclosed by the utility model, the structures of the developing box and the drum box are simplified, the production cost of the developing box can be effectively reduced, and the requirement of miniaturization of the developing box is favorably met.

Description

Technical Field

[0001] The utility model relates to the technical field of electrophotographic imaging, and particularly relates to a developing cartridge. Background Art

[0002] The prior art discloses a developing cartridge that can be installed together with a drum cartridge into an electrophotographic imaging device. The developing cartridge includes a housing, a developing roller, a powder feeding roller, a driving part, an electrode, and a storage medium; the drum cartridge includes a housing for accommodating the developing cartridge and a photosensitive drum for performing imaging operations. When the electrophotographic imaging device performs imaging operations, it is necessary to bring the developing roller into contact with the photosensitive drum, and when the electrophotographic imaging device stops imaging operations, it is necessary to separate the developing roller and the photosensitive drum. Specifically, one end of the developing cartridge includes a protrusion for receiving a pushing force from the drum cartridge to separate the developing roller and the photosensitive drum, and a separating member for receiving a pushing force from the electrophotographic imaging device to separate the developing roller and the photosensitive drum is provided at the other end of the developing cartridge.

[0003] For the above-mentioned developing cartridge to control the contact and separation between the developing roller and the photosensitive drum, structures for controlling the contact and separation between the developing roller and the photosensitive drum are provided at both ends of the developing cartridge and on both inner sides of the drum cartridge; specifically, structures for receiving an external force to separate the developing roller and the photosensitive drum are provided at both ends of the developing cartridge; this way of separately providing separating structures at both ends of the developing cartridge increases the complexity of the developing cartridge; it is not conducive to the requirement of miniaturizing the structure of the developing cartridge, and at the same time, the relatively complex structure will also increase the manufacturing cost of the developing cartridge. Summary of the Utility Model

[0004] Therefore, the utility model provides a developing cartridge to solve the above technical problems, which is mainly achieved through the following technical solutions:

[0005] A developing cartridge that can be detachably installed into a drum cartridge having a photosensitive drum, the developing cartridge includes:

[0006] A housing for accommodating a developer, the housing has a first side and a second side that are separately provided in a first direction, and the housing has a third side and a fourth side that are separately provided in a second direction intersecting the first direction;

[0007] A developing roller that can rotate around a developing roller axis extending in the first direction, the developing roller is provided on the third side of the housing in the second direction;

[0008] An input gear for receiving a driving force outside the developing cartridge, the input gear is located on the first side of the housing in the first direction;

[0009] A chip having an electrically conductive surface, the electrically conductive surface is located on the first side of the housing in the first direction;

[0010] A first protrusion that can receive a force outside the developing cartridge to move the developing roller from a first position, where the developing roller is in contact with the photosensitive drum, to a second position, where at least a part of the developing roller is separated from the photosensitive drum;

[0011] The first protrusion is located on the first side of the housing in a first direction;

[0012] The developing roller has a developing roller surface, and the photosensitive drum has a photosensitive drum surface. The developing roller surface has a first part located on the first side of the housing in the first direction and a second part located on the second side of the housing in the first direction;

[0013] In a state where the developing roller is in the second position, there is a first distance between the first part and the photosensitive drum surface, and a second distance between the second part and the photosensitive drum surface. Among them, the first distance is greater than the second distance.

[0014] Furthermore, the first protrusion is located on the first side of the housing in the first direction, and the first protrusion can receive the force of the drum cartridge to drive the developing roller to move from the first position to the second position.

[0015] Furthermore, it further includes a second protrusion located on the second side of the housing in the first direction. When the second protrusion is supported by the drum cartridge, the first protrusion receives a force outside the developing cartridge to move the developing roller from the first position to the second position.

[0016] Furthermore, an electrically conductive contact surface is fixedly provided on the first side of the housing. In a second direction, the second protrusion is located between the rotation axis of the developing roller and the electrically conductive contact surface.

[0017] Furthermore, in the second direction, the second protrusion is closer to the fourth side of the housing than to the third side of the housing.

[0018] Furthermore, in the second direction, the second protrusion is closer to the third side of the housing than to the fourth side of the housing.

[0019] Furthermore, the developing roller includes a colloidal part. In the first direction, the second protrusion is separated from the colloidal part, and the second protrusion is farther from the first side of the housing than the colloidal part of the developing roller.

[0020] Furthermore, the developing roller has a developing roller shaft, and the second protrusion is configured as a bushing sleeved on the developing roller shaft.

[0021] Furthermore, the outer surface of the bushing is configured as an arc. In the second position, the outer surface of the bushing contacts the photosensitive drum surface.

[0022] Furthermore, the developing cartridge can be installed in an electrophotographic imaging device;

[0023] It further includes a second protrusion which is located on the second side of the housing in the first direction. When the second protrusion is supported by the electrophotographic imaging device, the first protrusion receives a force outside the developing cartridge to move the developing roller from the first position to the second position.

[0024] Furthermore, it further includes a locking portion. When the developing cartridge is installed in the drum cartridge, the locking portion cooperates with the drum cartridge to prevent the developing cartridge from detaching from the drum cartridge. The locking portion is located on the second side of the housing in the first direction and is closer to the fourth side of the housing than the third side in the second direction.

[0025] Furthermore, it further includes a developing roller gear provided at one end of the developing roller. At least a first transmission gear and a second transmission gear are provided between the input gear and the developing roller gear.

[0026] Furthermore, it further includes a stirring frame, a stirring frame gear provided at one end of the stirring frame, and a third transmission gear connected between the input gear and the stirring frame gear. In the second direction, the rotation axis of the stirring frame gear is located between the rotation axis of the third transmission gear and the rotation axis of the input gear.

[0027] Furthermore, in the state where the developing roller is in the second position, the distance between the surface of the developing roller and the surface of the photosensitive drum gradually increases in the first direction from the end away from the first protrusion to the end closer to the first protrusion.

[0028] The present utility model further provides a developing cartridge which can be detachably installed into a drum cartridge having a photosensitive drum. The developing cartridge includes:

[0029] A housing for accommodating a developer. The housing has a first side and a second side which are separately arranged in the first direction, and a third side and a fourth side which are separately arranged in a second direction intersecting with the first direction.

[0030] A developing roller which can rotate around a developing roller axis extending in the first direction. The developing roller is arranged on the third side of the housing in the second direction.

[0031] An input gear for receiving a driving force outside the developing cartridge. The input gear is located on the first side of the housing in the first direction.

[0032] A chip having an electrically contactable surface. The electrically contactable surface is located on the first side of the housing in the first direction.

[0033] A first protrusion. The first protrusion is located on the first side or the second side of the housing in the first direction.

[0034] A second protrusion. The second protrusion is arranged on the opposite side of the first protrusion in the first direction.

[0035] When the second protrusion is supported by the drum cartridge, the first protrusion receives a force outside the developing cartridge to move the developing roller from a first position, where the developing roller contacts the photosensitive drum, to a second position, where at least a portion of the developing roller is separated from the photosensitive drum.

[0036] Furthermore, the second protrusion has a supported surface. When the supported surface is supported by the drum cartridge, the first protrusion can receive a force outside the developing cartridge to move the developing roller around the supported surface from the first position to the second position.

[0037] Furthermore, the developing roller includes a colloidal portion, and the second protrusions are spaced apart from the colloidal portion in a first direction.

[0038] Furthermore, the developing roller has a developing roller shaft, and the second protrusion is configured as a bushing sleeved on the developing roller shaft.

[0039] Furthermore, the first protrusion is located on a first side of the housing in the first direction. The first protrusion can receive a force from the drum cartridge to drive the developing roller to move from the first position to the second position;

[0040] When viewed in the first direction, the first protrusion overlaps at least a portion of the developing roller.

[0041] Furthermore, in a second direction, the second protrusion is closer to a fourth side of the housing than to a third side of the housing.

[0042] Furthermore, in a second direction, the second protrusion is closer to a third side of the housing than to a fourth side of the housing.

[0043] Furthermore, in the first direction, the first protrusion is located on a second side of the housing. The first protrusion can receive a force from the drum cartridge to drive the developing roller to move from the first position to the second position; the first protrusion can move relative to the housing.

[0044] Furthermore, in the second direction, the second protrusion is closer to a fourth side of the housing than to a third side of the housing relative to the housing.

[0045] Beneficial effects:

[0046] Compared with the prior art, the developing cartridge of the present utility model is provided with a force-receiving member including a force-receiving protrusion only on one side of the housing. The force-receiving member can receive an external force to drive the developing roller to separate from the photosensitive drum; the developing cartridge realizes the separation of the developing roller from the photosensitive drum in a state of only receiving the pushing force of the imaging device or the drum cartridge. Compared with the prior art, the structure of the developing cartridge is simplified, while reducing the production cost of the developing cartridge, it is beneficial to meet the requirement of miniaturization of the developing cartridge. Description of the Drawings

[0047] Figure 1 is a three-dimensional structural schematic diagram of a drum cartridge in the prior art;

[0048] Figure 2 is Figure 1 an enlarged view of part A in

[0049] Figure 3 a three - dimensional structure schematic diagram of one side in the length direction of the drum cartridge in Embodiment 1 of the present utility model;

[0050] Figure 4 a three - dimensional structure schematic diagram of the other side in the length direction of the drum cartridge in Embodiment 1 of the present utility model;

[0051] Figure 5 a three - dimensional structure schematic diagram of the developing cartridge in Embodiment 1 of the present utility model;

[0052] Figure 6 is in Embodiment 1 of the present utility model Figure 5 an enlarged schematic diagram of part B in

[0053] Figure 7 a left - hand side schematic diagram in the left - right direction with the cover of the developing cartridge in the hidden state in Embodiment 1 of the present utility model;

[0054] Figure 8 a three - dimensional structure schematic diagram of another angle of the developing cartridge in Embodiment 1 of the present utility model;

[0055] Figure 9 a disassembled structure schematic diagram of the developing cartridge and the drum cartridge in Embodiment 1 of the present utility model;

[0056] Figure 10 a three - dimensional structure schematic diagram of the developing cartridge in Embodiment 2 of the present utility model;

[0057] Figure 11 a disassembled structure schematic diagram of the contact part of the developing cartridge, the drum cartridge and the imaging device in Embodiment 2 of the present utility model;

[0058] Figure 12 a top - view of the developing cartridge in the up - down direction in Embodiment 2 of the present utility model;

[0059] Figure 13 a schematic diagram of the positional relationship between the developing cartridge and the photosensitive drum in the state where the separation protrusion does not receive the pressing force in Embodiment 2 of the present utility model;

[0060] Figure 14 a schematic diagram of the positional relationship between the developing cartridge and the photosensitive drum in the state where the separation protrusion receives the pressing force in Embodiment 2 of the present utility model;

[0061] Figure 15 a three - dimensional structure schematic diagram of the developing cartridge in Embodiment 3 of the present utility model;

[0062] Figure 16It is a three-dimensional structural schematic diagram of the developing cartridge from another angle in Embodiment 3 of the present utility model;

[0063] Figure 17 It is a right-side structural schematic diagram of the developing cartridge in Embodiment 3 of the present utility model;

[0064] Figure 18 It is a partial exploded structural schematic diagram of the right end portion of the developing cartridge in Embodiment 3 of the present utility model;

[0065] Figure 19 It is a three-dimensional structural schematic diagram of the bracket in Embodiment 3 of the present utility model;

[0066] Figure 20 It is a right-side structural schematic diagram of the developing cartridge in the installed state with the drum cartridge in Embodiment 3 of the present utility model;

[0067] Figure 21 It is an exploded structural schematic diagram of the developing cartridge, drum cartridge, and chip slot in Embodiment 3 of the present utility model;

[0068] Figure 22 It is a three-dimensional structural schematic diagram of the developing cartridge in Embodiment 4 of the present utility model;

[0069] Figure 23 It is a three-dimensional structural schematic diagram of the developing cartridge from another angle in Embodiment 4 of the present utility model;

[0070] Figure 24 It is a vertical sectional view of the developing cartridge in Embodiment 4 of the present utility model;

[0071] Figure 25 It is a partial exploded schematic diagram of the developing cartridge in Embodiment 4 of the present utility model;

[0072] Figure 26 It is a left view of the developing cartridge with the force-bearing member in the first position state in Embodiment 4 of the present utility model;

[0073] Figure 27 It is a left view of the developing cartridge with the force-bearing member in the second position state in Embodiment 4 of the present utility model;

[0074] Figure 28 It is a partial exploded schematic diagram of the developing cartridge in another implementation manner of Embodiment 4 of the present utility model;

[0075] Figure 29 It is a partial three-dimensional schematic diagram of the left end of the developing cartridge in the exploded state in Embodiment 4 of the present utility model;

[0076] Figure 30 It is a partial three-dimensional structural schematic diagram of the developing cartridge in Embodiment 5 of the present utility model;

[0077] Figure 31It is a schematic diagram of the positions of the photosensitive drum and the developing roller in the separated state in Embodiment 5 of the present utility model;

[0078] Figure 32 It is a partial exploded view of the developing cartridge in Embodiment 6 of the present utility model;

[0079] Figure 33 It is a partial left view of the developing cartridge when the force-receiving member is in the first position state in Embodiment 6 of the present utility model;

[0080] Figure 34 It is a partial left view of the developing cartridge when the force-receiving member is in the second position state in Embodiment 6 of the present utility model;

[0081] Figure 35 It is a three-dimensional structural diagram of the developing cartridge in Embodiment 7 of the present utility model;

[0082] Figure 36 It is a schematic diagram of the positions of the photosensitive drum and the developing roller in the separated state in Embodiment 7 of the present utility model;

[0083] Figure 37 It is a schematic diagram of the positions of the photosensitive drum and the developing roller in the separated state from another angle in Embodiment 7 of the present utility model;

[0084] Figure 38 It is a three-dimensional structural diagram of the right end portion of the developing cartridge in Embodiment 8 of the present utility model;

[0085] Figure 39 It is an exploded structural diagram of the right end portion of the developing cartridge in Embodiment 8 of the present utility model;

[0086] Figure 40 It is a schematic diagram of the right side structure of the developing cartridge in Embodiment 8 of the present utility model;

[0087] Figure 41 It is a schematic diagram when the developing roller and the photosensitive drum are in contact in Embodiment 8 of the present utility model;

[0088] Figure 42 It is a schematic diagram when the developing roller and the photosensitive drum are in the separated state in Embodiment 8 of the present utility model;

[0089] Figure 43 It is a schematic diagram of the right side structure of the developing cartridge in Embodiment 9 of the present utility model;

[0090] Figure 44 It is a schematic diagram of the left side structure of the developing cartridge in Embodiment 9 of the present utility model;

[0091] Figure 45 It is an exploded structural diagram of the right end portion of the developing cartridge in Embodiment 9 of the present utility model;

[0092] Figure 46It is a three-dimensional structural schematic diagram of the developing roller and the photosensitive drum in contact in Embodiment 9 of the present utility model;

[0093] Figure 47 It is a positional structural schematic diagram of the developing roller and the photosensitive drum in contact in Embodiment 10 of the present utility model;

[0094] Figure 48 It is a side view of the developing roller and the sheath in a disassembled state in Embodiment 10 of the present utility model;

[0095] Figure 49 It is a positional structural schematic diagram of the developing roller and the photosensitive drum in a separated state in Embodiment 10 of the present utility model. Detailed implementation manners

[0096] In order to make the objectives, technical solutions and technical effects of the embodiments of the present utility model clearer, the technical solutions of the developing cartridge of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only preferred embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present utility model.

[0097] Embodiment 1:

[0098] Figures 1-4 A drum cartridge 50 of the prior art is shown in [reference numeral]; Figures 5-9 A developing cartridge 100 of the present utility model is shown in [reference numeral]. The developing cartridge 100 can be detachably installed into the drum cartridge 50, and the two can be integrally installed into an electrophotographic imaging device (hereinafter referred to as "imaging device") for imaging operations. An accommodation cavity (not shown) for accommodating the developing cartridge 100 and the drum cartridge 50 is provided inside the imaging device. A chip slot 11 for accommodating the chip 140 and the chip holder 104 on the developing cartridge 100 is provided on one side of the accommodation cavity. Inside the chip slot 11, there is an electrical contact 12 for contacting the electrical contact surface 141 of the chip 140 to form an electrical connection ( Figure 10 ).

[0099] Multiple combinations of a drum cartridge 50 and a developing cartridge 100 can be installed inside the imaging device. Specifically, four combinations of a drum cartridge 50 and a developing cartridge 100 can be installed inside the imaging device, that is, the imaging device can accommodate four drum cartridges 50 and four developing cartridges 100; different colors of developers are loaded inside the four developing cartridges 100. When performing an imaging operation, one or more groups of developing cartridges 100 and drum cartridges 50 are required to participate to form images of different colors. When a certain group of developing cartridges 100 and drum cartridges 50 needs to participate in the imaging operation, the developing roller 120 in the corresponding developing cartridge 100 and the photosensitive drum 52 in the drum cartridge 50 need to be in contact, and when a certain group of developing cartridges 100 and drum cartridges 50 does not participate in the imaging operation, the corresponding developing roller 120 and the photosensitive drum 52 are in a separated state to improve the imaging quality of the imaging device.

[0100] As Figures 1-4 shown, the drum cartridge 50 includes a drum frame 51 and a photosensitive drum 52. The drum frame 51 is used to accommodate the developing cartridge 100. The photosensitive drum 52 is rotatably supported on one side in the width direction of the drum frame 51, and the photosensitive drum 52 can rotate around the photosensitive drum axis extending in the length direction of the drum cartridge 50; guiding grooves 53 are provided on both sides of the drum frame 51 in the length direction. The guiding grooves 53 are used to guide the installation of the developing cartridge 100 onto the drum cartridge 50, and the guiding grooves 53 are located on the side of the drum frame 51 close to the photosensitive drum 52 in the width direction; urging portions 55 are also provided on both sides of the drum frame 51 in the length direction. In the state where the developing cartridge 100 is installed on the drum cartridge 50, the urging portions 55 can apply an urging force to the developing cartridge 100 to make the developing cartridge 100 contact the photosensitive drum 52 of the drum cartridge 50 more closely to improve the imaging quality of the developing cartridge 100. In the width direction, the urging portions 55 are farther from the photosensitive drum 52 than the guiding grooves 53. The drum cartridge 50 is also provided with a locking member 54 for preventing the developing cartridge 100 from falling off. The locking member 54 is located on one side of the drum frame 51 in the length direction, and the locking member 54 is located on the side of the drum frame 51 away from the photosensitive drum 52 in the width direction.

[0101] The drum cartridge 50 further includes a separation cam 56 provided on the side of the drum frame 51 away from the locking member 54 in the length direction, and an abutting portion 57 is provided on the side of the drum frame 51 close to the locking member 54 in the length direction; in the state where the developing cartridge 100 is installed on the drum cartridge 50, the separation cam 56 can push the developing cartridge 100 in the direction of moving the developing roller 120 in the developing cartridge 100 away from the photosensitive drum 52 in the drum cartridge 50; when the separation cam 56 applies an urging force to the developing cartridge 100 or the developing cartridge 100 receives other forces from outside the developing cartridge 100 for moving the developing roller 120 away from the photosensitive drum 52, the abutting portion 57 can abut against the developing cartridge 100 to support the developing cartridge 100 in moving in the direction of moving the developing roller 120 away from the photosensitive drum 52.

[0102] As Figures 5-8As shown, the developing cartridge 100 includes a housing 101 that extends in the left-right direction. The housing 101 has a driving side and a conductive side that are separated in the left-right direction, and an opening side and a gripping side that are separated in the front-rear direction. In this embodiment, the left side of the housing 101 is the driving side, and the right side of the housing 101 is the conductive side. The front side is the opening side, and the rear side of the housing 101 is the gripping side. The housing 101 includes a powder bin 102 for accommodating the developer and a left cover 103 that is detachably mounted on one side of the powder bin 102 near the driving side. The left cover 103 covers at least a part of the gear train provided on the driving side of the powder bin 102 to protect the gear train. The gear train includes, but is not limited to, an input gear 111, a developing roller gear 112, a powder feeding roller gear 113, a stirring frame gear 114, and a plurality of connecting gears. The input gear 111 is used to connect to a driving member (not shown) inside the imaging device to receive the driving force of the imaging device and rotate about an input gear axis extending in the left-right direction. The input gear 111 is directly or indirectly connected to the developing roller gear 112, the powder feeding roller gear 113, and the stirring frame gear 114, so that the input gear 111 transmits the driving force to the developing roller gear 112, the powder feeding roller gear 113, and the stirring frame gear 114, driving the developing roller gear 112, the powder feeding roller gear 113, and the stirring frame gear 114 to rotate about their respective axes extending in the left-right direction. Inside the housing 100, there are provided a developing roller 120, a powder feeding roller, and a stirring frame. The developing roller 120 is rotatably supported at an opening provided on the opening side of the housing 101. The opening is for allowing the developer inside the housing 101 to leave the housing 101. The developing roller 120 can rotate about a developing roller axis extending in the left-right direction. The developing roller gear 112 is connected to the left end of the developing roller 120, and the developing roller gear 112 can drive the developing roller 120 to rotate. The powder feeding roller and the stirring frame are rotatably supported inside the housing 101. In the front-rear direction, the powder feeding roller is closer to the developing roller 120 than the stirring frame, and the powder feeding roller contacts the developing roller 120 in the front-rear direction. The powder feeding roller gear 113 and the stirring frame gear 114 are respectively connected to the left ends of the powder feeding roller and the stirring frame. The rotation of the powder feeding roller gear 113 can drive the powder feeding roller to rotate about its powder feeding roller axis extending in the left-right direction, and the rotation of the stirring frame gear 114 can drive the stirring frame to rotate about its stirring frame axis extending in the left-right direction. The rotation of the powder feeding roller and the stirring frame can stir the developer inside the housing 101 and convey the developer to the developing roller 120. The rotation of the developing roller 120 can convey the developer to the photosensitive drum 52 to develop the electrostatic latent image on the photosensitive drum 52. The developing cartridge 100 further includes a blade 108 disposed between the developing roller 120 and the housing 101. The blade 108 is used to limit the thickness of the developer attached to the developing roller 120, making the developer attached to the developing roller 120 more uniform, thereby improving the imaging quality of the developing cartridge 100.

[0103] AsFigure 7 As shown, a plurality of transmission gears are provided between the developing roller gear 112 and the input gear 111; the number of transmission gears is set to an even number to ensure that the rotation direction of the developing roller gear 112 is different from that of the input gear 111. That is, the number of transmission gears between the developing roller gear 112 and the input gear 111 is 2n (n is a positive integer). A first transmission gear 116 and a second transmission gear 115 are provided between the developing roller gear 112 and the input gear. The first transmission gear 116 is meshed with the input gear 111, the second transmission gear 115 is meshed with the developing roller gear 112, and the first transmission gear 116 is meshed with the second transmission gear 115. That is to say, the developing roller gear 112 is connected to the input gear 111 through the second transmission gear 115 and the first transmission gear 116, and receives the driving force of the input gear 111 to drive the developing roller 120 to rotate respectively. A third transmission gear is provided between the stirring frame gear 114 and the input gear 111. In the front-rear direction, the rotation axis of the stirring frame is located between the rotation axis of the stirring frame gear 114 and the rotation axis of the input gear 111. The stirring frame gear 114 receives the driving force of the input gear 111 through the third transmission gear to drive the stirring frame to rotate and reduce the rotation speed of the stirring frame to stir the developer inside the powder hopper 102, improving the stability of the rotation of the stirring frame.

[0104] The developing cartridge 100 further includes a guiding protrusion 105 and a pushing protrusion 106. The guiding protrusion 105 can cooperate with the guiding groove 53 of the drum cartridge 50 to guide the developing cartridge 100 to be installed at a proper position in the drum cartridge 50; in a state where the developing cartridge 100 is installed in the drum cartridge 50, the pushing protrusion 106 can receive the pushing force of the pushing portion 55 to make the developing roller 120 be in close contact with the photosensitive drum 52. Both the guiding protrusion 105 and the pushing protrusion 106 extend outward in the left-right direction from both sides of the housing 101; when observed in the left-right direction, the guiding protrusion 105 at least partially coincides with the developing roller 120 in the left-right direction. In this embodiment, the guiding protrusion 105 includes a first guiding protrusion 105a disposed on the driving side of the housing 101 and a second guiding protrusion 105b disposed on the conductive side of the housing 101, and the pushing protrusion 106 includes a first pushing protrusion 106a disposed on the driving side of the housing 101 and a second pushing protrusion 106b disposed on the conductive side of the housing 101. The first guiding protrusion 105a and the first pushing protrusion 106a are integrally formed; at least part of the second pushing protrusion 106b is made of a conductive material, and at least a part of the second pushing protrusion 106b is electrically connected to at least one of the developing roller 120, the powder feeding roller, and the powder discharging blade 108. In a state where the developing cartridge 100 is installed in the drum cartridge 50, the second pushing protrusion 106b can contact a power supply member (not shown) in the drum cartridge 50 or the imaging device to receive the electric power outside the developing cartridge 100 and supply the electric power to at least one of the developing roller 120, the powder feeding roller, and the powder discharging blade 108, so as to make the transportation of the developer in the developing cartridge 100 smoother.

[0105] On the drive side of the housing 101, there is also provided a chip 140 and a chip holder 104 for supporting the chip 140. The chip 140 includes a storage part (not shown) and an electrical contact surface 141. The storage part and the electrical contact surface 141 are electrically connected. The storage part is used to record information such as the model of the developing cartridge 100. The electrical contact surface 141 can contact and form an electrical connection with the electrical contact 12 inside the imaging device, so that the developing cartridge 100 and the imaging device establish a communication link. When the developing cartridge 100 is installed in the imaging device, the chip holder 104 enters the inside of the chip slot 11. At this time, the electrical contact surface 141 contacts the electrical contact 12 to establish a communication connection between the imaging device and the developing cartridge 100, so as to read the information of the developing cartridge 100. When the developer in the developing cartridge 100 is about to be exhausted, the imaging device can prompt the user to replace the new developing cartridge 100 through the operation panel or the indicator light. Optionally, the chip holder 104 extends outward from the left side of the housing 101. Specifically, the chip holder 104 extends outward from the left side of the left cover 103. In the front-rear direction, the chip holder 104 is closer to the rear side of the housing 101 than the front side of the housing 101. The chip 140 is supported on the top of the chip holder 104 in the up-down direction. The chip 140 includes an electrical contact surface 141 that can be electrically connected to the electrical contact point of the imaging device. The electrical contact surface 141 faces upward in the up-down direction. In the front-rear direction, the chip holder 104 is closer to the holding side of the housing 101 away from the developing roller 120. On the conductive side of the housing 101, there is also provided a locked part 107. The locked part 107 is close to the holding side of the housing 101 in the front-rear direction. The locked part 107 can cooperate with the locked part 54 of the drum cartridge 50 to prevent the developing cartridge 100 from falling off the drum cartridge 50.

[0106] To achieve the control of the contact and separation between the developing roller 120 in the developing cartridge 100 and the photosensitive drum 52 in the drum cartridge 50, when the developing cartridge 100 is installed in the drum cartridge 50, on one side of the developing cartridge 100 in the left-right direction, there is provided a separating member for receiving an external force to drive the developing roller 120 to move away from the photosensitive drum 52. Specifically, as Figure 5 and Figure 6As shown, a separated protrusion 161 as a separating member is provided on the driving side of the developing cartridge 100 in the left-right direction. The separated protrusion 161 includes a force receiving surface 161a for receiving an external force. The force receiving surface 161a is configured as a contact surface facing the front upper side of the developing cartridge 100. In a state where the developing cartridge 100 is mounted to the drum cartridge 50, the force receiving surface 161a can receive the pressing force of the separating cam 56 in the drum cartridge 50 to drive the developing cartridge 100 to move in a direction to separate the developing roller 120 from the photosensitive drum 52. This is not limiting. The force receiving surface 161a can also receive the force of the imaging device. Generally speaking, the force receiving surface 161a can receive the force outside the developing cartridge 100 and drive the developing cartridge 100 to move in a direction to separate the developing roller 120 from the photosensitive drum 52. The separated protrusion 161 extends outward from the left side of the housing 101. More specifically, the separated protrusion 161 extends outward from the left side of the first guided protrusion 105a, and the separated protrusion 161 is integrally formed with the first guided protrusion 105a and the first pressed protrusion 106a. Optionally, the separated protrusion 161 can also be integrally formed with the left cover 103.

[0107] Furthermore, as Figure 8 and Figure 9 shown, a supported protrusion 162 is also provided on the conductive side of the developing cartridge 100 in the left-right direction. The supported protrusion 162 is connected to the housing 101 through a connecting bracket 163. In this embodiment, the supported protrusion 162 is integrally connected to the connecting bracket 163, and the connecting bracket 163 is fixedly connected to the right side of the housing 101 by means of elastic buckles or screws, etc.; as Figure 8 shown, the supported protrusion 162 extends from the bottom of the connecting bracket 163 from the rear upper side of the developing cartridge 100 to the front lower side of the developing cartridge 100; the supported protrusion 162 can cooperate with the abutting portion 57 in the drum cartridge 50. In a state where the separated protrusion 161 is stressed and drives the developing cartridge 100 to move in a direction to separate the developing roller 120 from the photosensitive drum 52, the supported protrusion 162 contacts and abuts against the abutting portion 57 of the drum cartridge 50, so that the developing cartridge 100 rotates around the supported protrusion 162 in a direction to move the developing roller 120 away from the photosensitive drum 52. When the supported protrusion 162 abuts against the abutting portion 57, the pressing force received by the separated protrusion 161 can stably drive the developing roller 120 to move, thereby realizing the separation of the developing roller 120 from the photosensitive drum 52.

[0108] Alternatively, in other embodiments of the present invention, the supported protrusion 162 may directly extend rightward from the right side of the housing 101; at the same time, the abutting portion cooperating with the supported protrusion 162 may also be provided inside the imaging device, which is not limited. When the separating protrusion 161 is driven by an external force to move the developing cartridge 100 in a direction away from the photosensitive drum 52, the separating protrusion 161 abuts against the abutting portion 57 to serve as a support point, and the developing roller 120 is driven by the separating protrusion 161 to move away from the photosensitive drum 52.

[0109] Embodiment 2

[0110] Next, Embodiment 2 of the present invention will be described in detail with reference to the appended Figures 10-14 The same parts as those in Embodiment 1 described above will not be elaborated here. The difference lies in that the supported protrusion provided on the developing cartridge in this embodiment is different from the supported protrusion of the developing cartridge in Embodiment 1. In this embodiment, an abutting portion 13 is provided on the side wall on one side in the left-right direction inside the imaging device. The abutting portion 13 is configured to be a contact surface in a direction away from the photosensitive drum 52 when the developing cartridge 100 and the drum cartridge 50 are installed in the imaging device. The developing cartridge 100 includes separating protrusions 161 and supported protrusions 172 provided on both sides of the developing cartridge 100 opposite to each other in the left-right direction. That is to say, the separating protrusion 161 is located on one side of the developing cartridge 100 in the left-right direction, and the supported protrusion 172 is located on the other side of the developing cartridge 100 in the left-right direction. When the developing cartridge 100 is installed on the drum cartridge 50, the separating protrusion 161 can receive an external pressing force outside the developing cartridge 100 and drive the developing cartridge 100 to move in a direction away from the photosensitive drum 52. At this time, the supported protrusion 172 can abut against the abutting surface outside the developing cartridge 100 and the drum cartridge 50, preventing the developing roller 120 from moving in the left-right direction away from the separating protrusion 161 and moving toward the photosensitive drum 52, so that the developing roller 120 as a whole moves away from the photosensitive drum 52 after the separating protrusion 161 is stressed, thereby realizing the separation of the developing roller 120 from the photosensitive drum 52.

[0111] Specifically, as Figures 10-11As shown, in this embodiment, the separation protrusion 161 is located on the driving side of the developing cartridge 100 in the left - right direction, and the support protrusion 172 is located on the conductive side of the developing cartridge 100 in the left - right direction. In a state where the developing cartridge 100 is installed in the drum cartridge 50 and the developing cartridge 100 and the drum cartridge 50 are installed in the imaging device together, the separation protrusion 161 can receive the pressing force of the separation cam 56 in the drum cartridge 50 to drive the developing roller 120 to move away from the photosensitive drum 52; at this time, the support protrusion 172 can contact the abutting portion 13 inside the imaging device. That is to say, in a state where the separation protrusion 161 receives the pressing force of the drum cartridge 50, the support protrusion 172 contacts the abutting portion 13, so that the separation protrusion 161 drives the developing roller 120 to rotate away from the photosensitive drum 52 in the front - rear direction of the developing cartridge 100 approximately with the contact point between the support protrusion 172 and the abutting portion 13 as the fulcrum.

[0112] As Figure 12As shown, the supported protrusion 172 is closer to the rear end portion of the developing cartridge 100 than the front end portion of the developing cartridge 100 in the front-rear direction of the developing cartridge 100. In the front-rear direction of the developing cartridge 100, the supported protrusion 172 is located between the locked portion 107 and the second forced push protrusion 106b. That is to say, in the front-rear direction of the developing cartridge 100, the supported protrusion 172 is located on the side of the developing cartridge 100 away from the developing roller 120, so as to avoid interference between the supported protrusion 172 and the drum cartridge 50 when the developing cartridge 100 is installed on the drum cartridge 50 and affect the contact between the supported protrusion 172 and the imaging device. The supported protrusion 172 is configured as a protrusion extending in the left-right direction from the drive side of the developing cartridge 100. The supported protrusion 172 is located at the rightmost end of the developing cartridge 100 in the left-right direction. In the left-right direction, the supported protrusion 172 is farther from the drive side of the developing cartridge 100 than the second forced push protrusion 106b, so that the supported protrusion 172 can contact the imaging device. The supported protrusion 172 is connected to the powder cartridge 102 through the connecting portion 171. The connecting portion 171 is configured as a bridge-shaped bracket, so that the connection between the supported protrusion 172 and the powder cartridge 102 is more stable. In this embodiment, the supported protrusion 172 and the connecting portion 171 are integrally formed. The supported protrusion 172 extends outward from the side of the connecting portion 171 away from the powder cartridge 102. In other embodiments, the supported protrusion 172 may also extend outward in the left-right direction from the side of the powder cartridge 102 close to the conductive side. In the left-right direction, the separating protrusion 161 and the supported protrusion 172 are spaced apart from the developing roller 120. The separating protrusion 161 is farther from the conductive side of the developing cartridge 100 than the developing roller 120. The supported protrusion 172 is farther from the drive side of the developing cartridge 100 than the developing roller 120. Further, in the left-right direction, the separating protrusion 161 and the supported protrusion 172 are spaced apart from the colloidal portion of the developing roller 120. The separating protrusion 161 is farther from the conductive side of the developing cartridge 100 than the colloidal portion of the developing roller 120. The supported protrusion 172 is farther from the drive side of the developing cartridge 100 than the colloidal portion of the developing roller 120. That is to say, the separating protrusion 161 and the supported protrusion 172 are both arranged away from the colloidal portion of the developing roller 120 in the left-right direction, so that the colloidal portion of the developing roller 120 can obtain a larger movement amount when the separating protrusion 161 is stressed.

[0113] Figures 13-14 The positional relationship between the developing cartridge 100 and the photosensitive drum 52 is shown in the case where the separating protrusion 161 does not receive the forced push force and the case where it receives the forced push force, as Figure 13 shown in. In the state where the separating protrusion 161 does not receive the forced push force, the colloidal portion of the developing roller 120 is in close contact with the photosensitive drum 52, and the rotation axis of the developing roller 120 is parallel to the rotation axis of the photosensitive drum 52; as Figure 14As shown in the figure, when the separating protrusion 161 is subjected to the pushing force F, the supported protrusion 172 contacts the abutting portion 13 in the imaging device. At the same time, the separating protrusion 161 drives the developing roller 120 to tilt and move away from the photosensitive drum 52. At this time, the separation amount between the colloidal part of the developing roller 120 near the driving side of the developing cartridge 100 and the photosensitive drum 52 is S1, and the separation amount between the colloidal part of the developing roller 120 near the conductive side of the developing cartridge 100 and the photosensitive drum 52 is S2, and S1 is greater than S2. The distance between the surface of the developing roller 120 and the outer surface of the photosensitive drum 52 gradually increases in the left-right direction from the end away from the separating protrusion 161 to the end close to the separating protrusion 161.

[0114] Embodiment 3:

[0115] Next, Embodiment 3 of the present utility model will be introduced in detail with reference to the attached Figures 15-21 For the same parts as those in the above Embodiments 1-2, they will not be described in detail here. The difference is that the separating member provided on the developing cartridge in this embodiment is different from the separating member of the developing cartridge in the above embodiments. Optionally, a pushing member is provided inside the imaging device, and the pushing member can apply a force to the developing cartridge 100 to move the developing roller 120 away from the photosensitive drum 52, so as to separate the developing roller 120 from the photosensitive drum 52. An abutting portion for abutting against the components on the developing cartridge 100 is provided on the drum cartridge 50, such as Figures 1-2 As shown in the figure, in this embodiment, the upper edge 53a of the guide groove 53 serves as the abutting portion, but the abutting portion is not limited to the upper edge 53a of the guide groove 53; The following takes the upper edge 53a of the guide groove 53 in the drum cartridge 50 as the abutting portion as an example for illustration.

[0116] As Figures 15-18As shown, the separating member can receive the driving force of the pushing member in the imaging device to push the developing roller 120 to move away from the photosensitive drum 52, so as to realize the separation of the developing roller 120 from the photosensitive drum 52; specifically, the separating member includes a first movable member 261, a second movable member 262 and a bracket 263; the bracket 263 is fixedly connected to the right side of the housing 101 by means of screws or buckles, etc., and is used to support the first movable member 261 and the second movable member 262; the first movable member 261 can receive the pushing force provided by the pushing member in the imaging device to move relative to the housing 101 in the direction close to the second movable member 262; after the first movable member 261 contacts the second movable member 262, the first movable member 261 pushes the second movable member 262 to move relative to the housing 101 in the direction close to the developing roller 120, and the second movable member 262 can abut against the drum cartridge 50 during the movement and drive the developing cartridge 100 to move away from the photosensitive drum 52. The bracket 263 is provided with a first sliding groove 263a for accommodating the first movable member 261 and a second sliding groove 263b for accommodating the second movable member 262. In the front-rear direction, the first sliding groove 263a is farther from the developing roller 120 than the second sliding groove 263b. That is to say, in the state where the first movable member 261 and the second movable member 262 are installed on the bracket 263, in the front-rear direction, the first movable member 261 is farther from the developing roller 120 than the second movable member 262. The first movable member 261 includes a sliding portion 261a, and a force receiving portion 261b and a force applying portion 261c respectively provided at both ends of the sliding portion 261a. In the front-rear direction, the force receiving portion 261b is farther from the developing roller 120 than the force applying portion 261c, and the force applying portion 261c is configured as a cam shape that gradually protrudes forward from the downstream end to the upstream end in the X direction shown in Figure 17 That is, when the first movable member 261 moves in the X direction shown in Figure 17 , the force applying portion 261c externally applies a forward pushing force; the second movable member 262 is configured as a movable rod, and the second movable member 262 includes a pushed portion 262a and an abutting portion 262b. The second movable member 262 extends along the Figure 17 Y direction shown in, the pushed portion 262a is at one end close to the first movable member 261 in the front-rear direction of the developing cartridge 100, and the abutting portion 262b is at one end far from the first movable member 261 in the front-rear direction of the developing cartridge 100.

[0117] Furthermore, the sliding portion 261a of the second movable member 262 is configured as an arc shape. Correspondingly, the first sliding groove 263a is configured as an arc-shaped sliding groove that cooperates with the sliding portion 261a. The first sliding groove 263a is along Figure 17It extends along the arc where the X direction shown in the figure is located. When the pressing member in the imaging device applies a pressing force to the force-receiving portion 261b, the first movable member 261 moves in the X direction under the drive of the force-receiving portion 261b. During the movement of the first movable member 261, the force-applying portion 261c abuts against the pushed portion 262a of the second movable member 262 and transmits a driving force thereto, so that the second movable member 262 moves in the Y direction toward the side close to the developing roller 120 under the drive of the pushed portion 262a. During the movement of the second movable member 262, the abutting portion 262b approaches the guide groove 53 and finally abuts against the upper edge 53a provided in the guide groove 53 of the drum frame 51. When the abutting portion 262b abuts against the upper edge 53a, the abutting portion 262b applies a thrust force to the upper edge 53a of the guide groove 53. That is to say, the pressing force applied by the pressing member in the imaging device to the developing cartridge 100 is finally applied to the drum cartridge 50 through the transmission of the first movable member 261 and the second movable member 262. Under the action of the pressing force applied by the imaging device to the developing cartridge 100, the second movable member 262 remains in contact with the drum cartridge 50 and can move relative to the housing 101 in the Y direction toward the direction close to the photosensitive drum 52, so that the second movable member 262 drives the developing cartridge 100 to move away from the photosensitive drum 52, that is, the developing roller 120 moves away from the photosensitive drum 52, thereby realizing the separation of the developing roller 120 and the photosensitive drum 52.

[0118] Further, as Figure 21 shown, when the developing cartridge 100 and the drum cartridge 50 are installed together in the imaging device, the chip holder 104 is located inside the chip slot 11. The chip slot 11 limits the chip holder 104 in the vertical and horizontal directions of the developing cartridge 100 and restricts the movement of the developing cartridge 100 in its vertical and horizontal directions. As Figure 20 shown, when the imaging device applies a pressing force to the developing cartridge 100, the abutting portion 262b of the second movable member 262 in the separating member applies a pressing force to the upper edge 53a of the drum cartridge 50. Under the action of the pressing force, the right end portion of the developing cartridge 100 is supported with the side of the chip holder 104 close to the electrical contact surface 141 as a fulcrum and moves away from the photosensitive drum 52 along the Figure 20 Z direction shown in the figure; in the horizontal direction of the developing cartridge 100, the left end portion of the developing roller 120 is closer to the second movable member 262 than the chip holder 104, that is, the chip holder 104 and the developing roller 120 are spaced apart in the horizontal direction. Under the action of the pressing force of the imaging device, the complete separation of the developing roller 120 and the photosensitive drum 52 is realized.

[0119] Still further, as Figure 17As shown, at one end of the second movable member 262 close to the developing roller 120, a support portion 262c is provided opposite to the abutting portion 262b. The support portion 262c is closer to the developing roller 120 than the abutting portion 262b in the up-down direction. When the second movable member 262 moves toward the side close to the developing roller 120 along the Y direction and the abutting portion 262b abuts against the upper edge 53a of the drum cartridge 50, the support portion 262c contacts the second guiding protrusion 105b and receives the supporting force provided by the second guiding protrusion 105b. Under the action of the supporting force, the pressing force exerted by the abutting portion 262b on the upper edge 53a is stabilized, and further the separation between the developing roller 120 and the photosensitive drum 52 is stabilized.

[0120] Embodiment 4:

[0121] Next, Embodiment 4 of the present utility model will be introduced in detail in conjunction with the attached Figures 22-29 For the parts that are the same as those in the above Embodiments 1-3, they will not be elaborated here. The difference lies in that the separating member provided on the developing cartridge in this embodiment is different from the separating member of the developing cartridge in the above embodiments.

[0122] In order to effectively control the contact and separation between the photosensitive drum 52 and the developing roller 120 and be different from the prior art, the developing cartridge 100 of the present utility model is provided with a force-receiving protrusion for receiving an external force only on one side of the two sides in the left-right direction, and drives the separation of the developing roller 120 from the photosensitive drum 52 under the action of the external force. Specifically, the above external force can come from the pressing member of the imaging device or the separation cam 56 of the drum cartridge 50. Here, a specific embodiment in which the force-receiving protrusion of the developing cartridge 100 receives the pressing force of the separation cam 56 to realize the separation of the developing roller 120 from the photosensitive drum 52 will be specifically described.

[0123] Specifically, the developing cartridge 100 is provided with a force-receiving member 710 including a force-receiving protrusion 711 for receiving an external force to separate the developing roller 120 from the photosensitive drum 52; the force-receiving protrusion 711 is located on the left side of the developing cartridge 100 in the left-right direction. In the state where the developing cartridge 100 is installed on the drum cartridge 50, the force-receiving protrusion 711 can contact the separation cam 56. The developing roller 120 includes a colloidal part for carrying the developer. In the left-right direction, the force-receiving protrusion 711 is separated from the colloidal part, and the force-receiving protrusion 711 is farther from the right side of the housing 101 than the colloidal part; in the front-rear direction, the force-receiving protrusion 711 is closer to the developing roller 120 than the input gear 111.

[0124] As Figure 25 shown, the force-receiving member 710 is configured as a slider that can move relative to the housing 101, and the force-receiving protrusion 711 extends outward in the left-right direction. When the force-receiving protrusion 711 receives the separating force of the separation cam 56, the force-receiving member 710 can move the developing roller 120 from the first position in contact with the photosensitive drum 52 (such asFigure 25 shown) to the second position where the developing roller 120 is separated from the photosensitive drum 52 (as Figure 27 shown).

[0125] The developing cartridge 100 further includes a separating lever, which includes a first separating lever 720 and a second separating lever 730. The first separating lever 720 is located on the side of the developing cartridge 100 closer to the force-receiving member 710 in the left-right direction, and the second separating lever 730 is located on the side of the developing cartridge 100 farther from the force-receiving member 710 in the left-right direction. When the force-receiving protrusion 711 receives a force from the separating cam 56, the first separating lever 720 and the second separating lever 730 can respectively abut against both sides of the drum frame 51 according to the movement of the force-receiving member 710, and drive the developing roller 120 to separate from the photosensitive drum 52; when the first separating lever 720 and the second separating lever 730 respectively abut against both sides of the drum frame 51 in the longitudinal direction, the relative movement between the developing roller 120 and the photosensitive drum 52 is more balanced.

[0126] Specifically, Figure 25 and Figure 28 shown, the force-receiving member 710 further includes a pushing surface 712; the first separating lever 720 includes a receiving portion 721 that can receive an external force and a first separating portion 722 that can contact the drum frame 51; the second separating lever 730 includes a second separating portion 731 that can contact the drum frame 51; further, a connecting rod 740 is provided between the first separating lever 720 and the second separating lever 730, and the connecting rod 740 connects the first separating lever 720 and the second separating lever 730, so that the second separating lever 730 can move synchronously with the first separating lever 720; specifically, as Figure 7 shown, the connecting rod 740 is connected to the housing 101 through a guiding groove 117 provided on the housing 101, the guiding groove 117 extends in the front-rear direction, and the connecting rod 740 moves in the front-rear direction along the guiding groove 117.

[0127] Further, in this embodiment, the first separation rod 720 and the second separation rod 730 are respectively located on the left and right sides of the developing cartridge 100 in the left-right direction; specifically, the first separation rod 720 is located on the left side of the developing cartridge 100, and the second separation rod 730 is located on the right side of the developing cartridge 100. Both the first separation rod 720 and the second separation rod 730 are connected to the housing 101 through the limiting members 118 provided on both sides of the developing cartridge 100. The limiting member 118 is configured as a limiting sleeve sleeved on the outer surfaces of the first separation rod 720 and the second separation rod 730. The inside of the limiting member 118 includes a limiting hole 118a. Preferably, the limiting hole 118a is configured as a square hole that cooperates with the first separation rod 720 and the second separation rod 730 to limit the movement and rotation of the first separation rod 720 and the second separation rod 730 in the radial direction in their extending directions, so that the first separation rod 720 and the second separation rod 730 can only move along the extending directions of the first separation rod 720 and the second separation rod 730, and drive the developing roller 120 to separate from the photosensitive drum 52.

[0128] As Figures 27-28 shown, when the imaging device needs to control the separation of the developing roller 120 and the photosensitive drum 52, when the separating member (not shown) in the imaging device applies a force to the separating cam 56, the separating cam 56 applies a force to the force-receiving projection 711, so that the force-receiving member 710 moves relative to the housing 101 from the first position (as Figure 26 shown) to the second position (as Figure 27 shown). At this time, the second pushing surface 712 of the force-receiving member 710 applies a force to the force-receiving projection 721 of the first separation rod 720. At the same time, the first separating portion 722 of the first separation rod 720 is in contact with the drum frame 51, so that the first separation rod 720 drives the developing cartridge 100 to move in the width direction of the drum cartridge 50 away from the photosensitive drum 52. The developing roller 120 moves with the developing cartridge 100 away from the photosensitive drum 52. At this point, the developing roller 120 and the photosensitive drum 52 will be separated by a distance S, thus realizing the separation of the developing roller 120 and the photosensitive drum 52. Further, as Figure 11 shown, the developing cartridge 100 is provided with a limiting member 118 for preventing the force-receiving member 710, the first separation rod 720, and the second separation rod 730 from falling off the developing cartridge 100. The limiting member 118 can also be used as a guiding member for guiding the movement of the force-receiving member 710, the first separation rod 720, and the second separation rod 730. When the force-receiving member 710 is pushed by an external force and generates a thrust on the first separation rod 720, the first separation rod 720 moves relative to the housing 101 along the extending direction of the limiting member 118 under the guidance of the limiting member 118.

[0129] Similar to the first separation lever 720, when the first separation lever 720 moves from the first position to the second position, the second separation lever 730 connected to the first separation lever 740 through the connecting rod 740 moves synchronously with the first separation lever 720. At this time, the second separation part 731 of the second separation lever 730 abuts against the drum frame 51 at the same time, so that the developing cartridge 100 moves in the width direction of the drum cartridge 50 away from the photosensitive drum 52, thus realizing the separation of the developing roller 120 from the photosensitive drum 52. By applying separation forces to the drum frame 51 on both sides in the length direction of the drum cartridge 50 through the first separation lever 720 and the second separation lever 730, the separation of the developing roller 120 from the photosensitive drum 52 is more balanced.

[0130] When the imaging device needs to control a certain developing cartridge 100 to participate in the imaging operation (when the color imaging device switches color modes). The imaging device stops applying a separation force to the separation cam 56 in the drum cartridge 50. That is to say, the separation force received by the force-receiving member 710 in the developing cartridge 100 is released. At this time, only the joining force applied to the developing cartridge 100 by the urging portion 55 exists between the developing cartridge 100 and the drum cartridge 50. Under the action of the joining force, the developing cartridge 100 drives the developing roller 120 to move in the width direction of the drum cartridge 50 towards the photosensitive drum 52, so that the developing roller 120 contacts the photosensitive drum 52 again.

[0131] Compared with the prior art method of setting separation structures on both sides of the drum cartridge 50 and the developing cartridge 100, the developing cartridge 100 of the present utility model is only provided with a force-receiving member 710 for receiving a separation force on one side, and transmits the separation force to the separation levers located on both sides of the developing cartridge 100, so that the separation levers apply separation forces to the drum frame 51 on the left and right sides of the developing cartridge 100 at the same time, thereby realizing the separation of the developing roller 120 from the photosensitive drum 52, simplifying the structures of the developing cartridge 100 and the drum cartridge 50, effectively reducing the production cost of the developing cartridge 100, and being beneficial to meeting the requirement of miniaturization of the developing cartridge 100.

[0132] Preferably, in this embodiment, the first separation lever 720, the second separation lever 730 and the connecting rod 740 can be set as an integral separation lever; alternatively, in an implementable way of this embodiment, the separation lever can also be split into multiple independent structures. When the force-receiving member 710 applies a force to any component of the separation lever, the separation lever can move relative to the housing 101.

[0133] Alternatively, in an implementable way of this embodiment, Figure 29As shown, an elastic member 740a is provided between the separation lever and the housing 101. Specifically, the housing 101 includes two guide grooves 117 provided on the housing 101 and opposed to each other in the left-right direction. The separation lever includes a connecting rod 740 extending in the left-right direction. The connecting rod 740 is located inside the guide groove 117 and is slidably connected to the guide groove 117. Two elastic members 740a are provided, and the two elastic members 740a are correspondingly installed inside the two guide grooves 117. The elastic member 740a is located on the side of the connecting rod 740 closer to the developing roller 120 in the front-rear direction. The elastic member 740a is configured as a compression spring that applies a thrust force in the direction away from the developing roller 120 to the connecting rod 740 in the front-rear direction. When the force-receiving member 710 is subjected to an external force, the force-receiving member 710 applies a forward thrust force in the front-rear direction to the first separation lever 720 located on the left side of the separation lever. When the first separation lever 720 moves forward under the force, when the first separation lever 720 drives the second separation lever 730 located on the right side of the separation lever to move together, the two elastic members 740a respectively apply thrust forces to both sides of the connecting rod 740, thereby preventing the separation lever from being unevenly stressed when receiving the thrust force of the force-receiving member 710, and making the movement of the separation lever smoother. Preferably, the elastic member 740a is configured as a compression spring, the elastic force of the elastic member 740a is small, and the elastic force of the elastic member 740a is much smaller than the pressing force received by the force-receiving member 710.

[0134] Embodiment 5:

[0135] Next, embodiments 5 of the present invention will be described in detail with reference to the attached Figures 30-31 Embodiment 5 of the present invention provides a developing cartridge. For the same parts of the developing cartridge in this embodiment and the developing cartridge in the above embodiment, this embodiment will not be described again. The difference is that the separating member provided on the developing cartridge in this embodiment is different from the separating member of the developing cartridge in the above embodiment. A force-receiving protrusion 161 is provided on one side of the developing cartridge 100. The force-receiving protrusion 161 receives an external force, and this external force can drive the separation of the developing roller 120 and the photosensitive drum 52.

[0136] Specifically, as Figure 30 shown, the force-receiving protrusion 161 is located on the left side of the developing cartridge 100 in the left-right direction.

[0137] Optionally, the force-receiving protrusion 161 is relatively fixedly connected to the left side of the developing cartridge 100; when the imaging device needs to control the separation of the developing roller 120 and the photosensitive drum 52 (when the color imaging device switches the color mode and a certain developing cartridge 100 is not involved). As Figure 31 shown, the force-receiving protrusion 161 receives a force outside the developing cartridge 100, and the force-receiving protrusion 161 drives the developing cartridge 100 to tilt left-rearward, thereby realizing the separation of the developing roller 120 and the photosensitive drum 52.

[0138] Embodiment 6:

[0139] Next, embodiments of the present utility model will be described in detail with reference to the accompanying Figures 32-34 drawings. Embodiment 6 of the present utility model provides a developing cartridge. For the similarities between the developing cartridge of this embodiment and the developing cartridge in the above embodiments, they will not be elaborated in this embodiment. The difference lies in that the separating member in this embodiment has a different setting from that in the above embodiments.

[0140] As Figure 32 shown, in this embodiment, the developing cartridge 100 includes a force-receiving member 610 having a force-receiving protrusion 611, and a separating member that can separate the developing roller 120 from the photosensitive drum 52. The separating member includes a first separating member 620 and a second separating member 630. A connecting rod 640 is provided between the first separating member 620 and the second separating member 630. The connecting rod 640 connects the first separating member 620 and the second separating member 630, so that the second separating member 630 can move synchronously with the first separating member 620; and the first separating member 620 and the second separating member 630 can rotate relative to the housing 101 about the axis where the connecting rod 640 is located. The force-receiving member 610 further includes a pushing surface 612. The first separating member 620 includes a force-receiving surface 621 and a first separating protrusion 622. The second separating member 630 includes a second separating protrusion 631.

[0141] As Figures 33-34 shown, in a state where the force-receiving protrusion 611 of the force-receiving member 610 receives the force of the separating protrusion 56 in the drum cartridge 50, the force-receiving member 610 moves from the first position (as Figure 33 shown) to the second position (as Figure 34 shown). At this time, the force-receiving surface 621 of the first separating member 620 is pushed by the second pushing surface 612 of the force-receiving member 610, so as to rotate about the axis of the connecting rod 640 from the position where the developing roller 120 is in contact with the photosensitive drum 52 (as Figure 33 shown) to the position where the developing roller 120 is separated from the photosensitive drum 52 (as Figure 33 shown). When the first separating member 620 moves from the first position to the second position, the first separating protrusion 622 of the first separating member 620 rotates in the direction M close to the photosensitive drum 52. During the rotation, the first separating protrusion 622 abuts against the drum frame 51, driving the developing cartridge 100 to move away from the photosensitive drum 52 by a distance S until the developing roller 120 is separated from the photosensitive drum 52, thus realizing the separation of the developing roller 120 from the photosensitive drum 52.

[0142] The second separating member 630 connected to the connecting rod 640 moves along with the first separating member 620. When the force-receiving protrusion 611 is subjected to force, similar to the first separating rod 620, the second separating protrusion 631 of the second separating member 630 abuts against the drum frame 51 on the right side in the length direction of the drum cartridge 50, driving the developing cartridge 100 to move away from the photosensitive drum 52, thereby realizing the separation of the developing roller 120 from the photosensitive drum 52. By applying separation forces to the drum frame 51 simultaneously on both sides in the length direction of the drum cartridge 50 by the first separating member 620 and the second separating member 630, the separation of the developing roller 120 from the photosensitive drum 52 becomes more balanced.

[0143] Compared with the prior art in which separation structures are provided on both sides of the drum cartridge 50 and the developing cartridge 100, in the developing cartridge 100 of the present utility model, a force-receiving member 610 for receiving the separation force is provided on one side, and the separation force is transmitted to the separating members located on both sides of the developing cartridge 100, so that the separating members apply separation forces to the drum frame 51 simultaneously on the left and right sides of the developing cartridge 100, thereby completing the separation of the developing roller 120 from the photosensitive drum 52; this setting simplifies the structures of the developing cartridge 100 and the drum cartridge 50, can effectively reduce the production cost of the developing cartridge 100, and is conducive to meeting the requirement of miniaturization of the developing cartridge 100.

[0144] Embodiment 7:

[0145] Next, embodiments 7 of the present utility model will be described in detail with reference to the attached Figures 35-37 To describe Embodiment 7 of the present utility model in detail, Embodiment 7 provides a developing cartridge. For the similarities between the developing cartridge of this embodiment and the developing cartridge in Embodiment 7 above, they will not be elaborated in this embodiment. The separating member provided on the developing cartridge in this embodiment is different from the separating member of the developing cartridge in the above embodiment; specifically, to realize the control of the contact and separation between the developing roller 120 and the photosensitive drum 52, a force-receiving member 1010 having a force-receiving protrusion 1011 is provided on one side of the developing cartridge 100 in the left-right direction. The force-receiving protrusion 1011 can receive an external force of the developing cartridge 100 and drive the developing roller 120 to move from a first position in contact with the photosensitive drum to a second position where at least a part of the developing roller is separated from the photosensitive drum 52. The developing cartridge 100 further includes a chip holder 104 fixedly provided on the left side of the housing 101 and a chip 140 supported by the chip holder 104; the chip holder 104 is provided on the opposite side of the force-receiving protrusion 1011 in the left-right direction. In the front-rear direction, the force-receiving protrusion 1011 is closer to the rear side of the housing 101 than the front side. The second forced push protrusion 106b includes an electrical contact part, and the electrical contact part is exposed on the right side of the housing 101 in the left-right direction. In the front-rear direction, the force-receiving protrusion 1011 is closer to the rear side of the housing than the electrical contact part.

[0146] Specifically, the force-receiving protrusion 1011 is located on the left or right side of the developing cartridge 100 in the left-right direction; in this embodiment, an example is specifically described where the force-receiving protrusion 911 is located on the right side of the developing cartridge 100 in the left-right direction; as Figures 36-37 shown, the developing cartridge 100 includes a force-receiving member 1010 and a separating lever 1030, and a connecting member 1020 for transmitting a driving force is provided between the force-receiving member 1010 and the separating lever 1030. When an external force acts on the force-receiving protrusion 1011 of the developing cartridge 100 to cause the separating lever 1030 to drive the developing cartridge 100 to tilt upward to the right with the contact position between the guiding protrusion 1012 provided on the left side of the housing 101 and the guiding groove 53 on the right side of the drum cartridge 50 as a fulcrum (as Figure 37 shown), at this time, the distance between the developing roller 120 on the right side of the developing cartridge 100 and the photosensitive drum 52 is S1, and the distance between the developing roller 120 on the left side of the developing cartridge 100 and the photosensitive drum 52 is S2. S1 is greater than S2. That is to say, when the developing cartridge 100 is separated by an external force, the movement amount of the right side of the developing cartridge 100 is greater than the movement amount of the left side of the developing cartridge 100. When the developing roller 120 and the photosensitive drum 52 in the developing cartridge 100 are separated, the movement amount of the electrical contact surface 141 of the developing cartridge 100 is small, and the electrical contact surface 141 can maintain contact with the electrical contact point in the imaging device when the developing roller 120 and the photosensitive drum 52 are separated, thereby ensuring that the communication connection between the developing cartridge 100 and the imaging device is not affected when the developing roller 120 and the photosensitive drum 52 are separated.

[0147] Embodiment 8:

[0148] Next, it will be combined with the attached Figures 38-42As shown in the figure, Embodiment 8 of the present utility model will be described in detail. For the similarities between the developing cartridge in this Embodiment 8 and the developing cartridge in the above embodiment, they will not be repeated in this embodiment. The difference is that the separating member provided on the developing cartridge in this embodiment is different from the separating member of the developing cartridge in the above embodiment; the developing cartridge 100 in this embodiment includes a force-receiving protrusion 1111 for receiving an external force. The force-receiving protrusion 1111 protrudes rightward from the right side of the sliding block 1110. The sliding block 1110 is located on the right side of the housing 101 of the developing cartridge 100; the developing cartridge 100 further includes a second sliding block 1120. The second sliding block 1120 can move according to the movement of the sliding block 1110. Specifically, the sliding block 1110 includes a first guiding groove 1112 and a second guiding groove 1113. After the force-receiving protrusion 1111 receives a pushing force, the sliding block 1110 moves along the first guiding groove 1112 in the direction of the applied force. The first guiding groove 1112 extends in the front-back direction. The extending direction of the second guiding groove 1113 intersects with the extending direction of the first guiding groove 1112. The second guiding groove 1113 extends from the rear-lower direction to the front-upper direction; the second sliding block 1120 includes a guiding protrusion 1121. The guiding protrusion 1121 protrudes rightward from the right side of the second sliding block 1120. The guiding protrusion 1121 is located inside the second guiding groove 1113 of the sliding block 110; the right side of the developing cartridge 100 further includes a right cover 1130 for covering the above-mentioned sliding block 1110 and the second sliding block 1120. A sliding groove 1131 for accommodating the second sliding block 1120 is provided on the inner side of the right cover 1130. The extending direction of the sliding groove 1131 intersects with the extending direction of the second guiding groove 1113. So that when the sliding block 1110 slides along the first guiding groove 1112, the second sliding block 1120 moves along the direction of the sliding groove 1131 under the push of the second guiding groove 1113. The inner side of the right cover 1130 further includes a limiting protrusion 1132. When the right cover 1130 covers the sliding block 1110 and the second sliding block 1120, the limiting protrusion 1132 is located inside the first guiding groove 1112. Thus, after the force-receiving protrusion 1111 of the sliding block 1110 receives an external force, the sliding block 1110 moves along the first guiding groove 1112 in the downstream direction of the force.

[0149] As Figures 41-42 As shown in the figure, the right side of the drum cartridge 50 includes an abutting portion 57 that extends upward in the up-down direction of the drum frame 51. The second sliding block 1120 further includes a pressing surface 1122. When the second sliding block 1120 slides along the sliding groove 1131, the second sliding block 1120 contacts the abutting portion 57. At this time, the pressing surface 1122 of the second sliding block 1120 contacts the abutting portion 57 and abuts against the abutting portion 57. Thereby, the second sliding block 1120 drives the developing cartridge 100 to move a distance S in the direction away from the photosensitive drum 52 (the width direction of the drum cartridge 50 in the figure), and further separates the developing roller 120 from the photosensitive drum 52.

[0150] When the imaging device needs the developing cartridge 100 to participate in the imaging operation, the imaging device cancels the acting force on the force-receiving protrusion 1111. The force-receiving protrusion 1111 no longer receives the thrust force. At the same time, the developing cartridge 100 receives the thrust force from the urging portion 55 of the drum cartridge 50, so that the developing cartridge 100 moves toward the photosensitive drum 52 of the drum cartridge 50 until the developing roller 120 is in close contact with the photosensitive drum 52 under the pushing of the urging portion 55. In this way, the imaging device can conveniently control the contact and separation between the developing roller 120 and the photosensitive drum 52.

[0151] Embodiment 9:

[0152] Next, the embodiments in the present utility model will be described in detail with reference to the appended Figures 43-46 Embodiment 9 of the present utility model will be described in detail below. For the similarities between the developing cartridge of this embodiment 9 and the developing cartridge 1 in the above embodiment, this embodiment will not be repeated. The differences between this embodiment 9 and the above embodiment are that in this embodiment, the developing cartridge 100 is provided with support protrusions 1260 that extend outward from both sides of the housing 101 in the left-right direction; the developing cartridge 100 includes a sliding member 1210 and a separating member 1220 as separating components, and a cover 1230 for supporting the sliding member 1210 and the separating member 1220. The right side of the sliding member 1210 protrudes to the right to form a force-receiving protrusion 1211; in the front-rear direction, the support protrusion 1260 is located between the force-receiving protrusion 1211 and the developing roller 120, and the support protrusion 1260 can cooperate with the support portion 61 of the drum cartridge 50; when the force-receiving protrusion 1211 of the developing cartridge 100 receives an external force and transmits the force to the separating member 1220, the abutting portion 1222 of the separating member 1220 abuts against the drum frame 51. At the same time, the support protrusion 1260 abuts against the support portion 61 on the drum cartridge 500, and the separating member 1220 drives the developing cartridge 100 to rotate clockwise in the direction F around the support protrusion 1260, so that the developing roller 120 moves away from the photosensitive drum 52, thereby realizing the separation between the developing roller 120 in the developing cartridge 100 and the photosensitive drum 52 in the drum cartridge 50; further, when the force-receiving protrusion 1211 receives an external force and transmits it to the separating member 1220, the separating member 1220 can move along the Figure 43 direction E shown in the figure; in the front-rear direction, the support protrusion 1260 is arranged closer to the developing roller 120 than the separating member 1220. During the separation process, when the support protrusion 1260 and the support portion 61 abut, the relative movement between the developing cartridge 100 and the drum cartridge 50 is more stable, that is, the separation action between the developing roller 120 and the photosensitive drum 52 can be ensured to be more stable.

[0153] Similar to the above embodiment, when the force-receiving protrusion 1211 is no longer under force, the developing cartridge 100 moves the developing roller 120 toward the photosensitive drum 52 and contacts it under the thrust force of the urging portion 55.

[0154] Example 10:

[0155] Next, embodiments of the present utility model will be described in detail with reference to the Figures 47-49 drawings. In Example 10 of the present utility model, a developing cartridge is provided. For the similarities between the developing cartridge in this example and the developing cartridges in the above embodiments, they will not be repeated in this example. In this example, the developing roller 120 includes a developing roller shaft 122 and a rubber layer 123 as the colloidal part. A sheath 124 is sleeved on the developing roller shaft 122. The sheath 124 includes a left sheath 124a and a right sheath 124b; the sheath 124 is provided at the ends of the developing roller shaft 122 in the left-right direction. The left sheath 124a is provided at the left end of the developing roller shaft 122, and the right sheath 124b is provided at the right end of the developing roller shaft 122; one of the left sheath 124a and the right sheath 124b can be set according to actual applications, and it is not necessary to have both.

[0156] The sheath 124 is annular, and the thickness H1 of the sheath 124 is substantially the same as the thickness H2 of the rubber layer 123. When the developing cartridge 100 is installed on the drum cartridge 50, the outer surface of the sheath 124 contacts the outer surface of the photosensitive drum 52. The sheath 124 can limit the distance between the developing roller shaft 120 and the outer surface of the photosensitive drum 52, so that the contact between the outer surface of the developing roller 120 and the outer surface of the photosensitive drum 52 is more uniform.

[0157] On the other hand, when the imaging device or the drum cartridge 50 applies a thrust to the force receiving protrusion 1311 located on one side of the developing cartridge 100, the force receiving protrusion 1311 drives the developing cartridge 100 to tilt backward toward the side close to the force receiving protrusion 1311, so that the developing roller 120 and the photosensitive drum 52 are tilted and separated; when the developing roller 120 and the photosensitive drum 52 are separated, the sheath 124 on the side opposite to the force receiving protrusion 1311 supports between the photosensitive drum 52 and the developing roller 120, so that the outer surface of the photosensitive drum 52 and the outer surface of the developing roller 120 are separated.

[0158] Sheaths 124 are provided at both ends of the developing roller shaft 122; alternatively, the sheath 124 is provided at one end of the developing roller shaft 122 that is far from the force receiving protrusion 1311 in the left-right direction. When the force receiving protrusion 1311 receives a thrust from the imaging device or the drum cartridge 50, the sheath 124 supports between the developing roller shaft 122 and the photosensitive drum 52. By providing the sheath 124, it is possible to prevent the situation where the imaging effect is affected due to incomplete separation of the developing roller 120 and the photosensitive drum 52. After the force receiving protrusion 1311 receives a thrust from the imaging device or the drum cartridge 50, the force receiving protrusion 1311 drives the developing cartridge 100 to tilt away from the photosensitive drum 52 around the sheath 124, so that the outer surface of the developing roller 120 and the outer surface of the photosensitive drum 52 are separated.

[0159] Functions and beneficial effects:

[0160] Compared with the prior art, for the developing cartridge of the present utility model, a force-receiving member including a force-receiving protrusion is only provided on one side of the housing, and the force-receiving member can receive an external force to drive the developing roller to separate from the photosensitive drum; thus, the separation of the developing roller from the photosensitive drum is achieved when the developing cartridge only receives the pushing force of the imaging device or the drum cartridge. Compared with the prior art, the structure of the developing cartridge is simplified, while reducing the production cost of the developing cartridge, it is beneficial to meet the requirement of miniaturization of the developing cartridge.

[0161] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A developing box, which can be detachably mounted in a drum box having a photosensitive drum, the developing box comprising: A housing for containing a developer, the housing having a first side and a second side separately arranged in a first direction, and the housing having a third side and a fourth side separately arranged in a second direction intersecting the first direction; a developing roller rotatable about a developing roller axis extending in the first direction, the developing roller being disposed on the third side of the housing in the second direction; an input gear, for receiving a driving force from outside the developing cartridge, the input gear being located on the first side of the housing in the first direction; a chip having an electrical contact surface, the electrical contact surface being located on the first side of the housing in the first direction; It is characterized by further comprising: a first protrusion, capable of receiving a force from outside the developing cartridge to move the developing roller from a first position to a second position, wherein the first position is a position where the developing roller contacts the photosensitive drum, and the second position is a position where at least a portion of the developing roller is separated from the photosensitive drum; The first protrusion is located on the first side of the housing in the first direction; The developing roller has a developing roller surface, the photosensitive drum has a photosensitive drum surface, the developing roller surface has a first portion located at the first side of the housing in the first direction and a second portion located at the second side of the housing in the first direction; When the developing roller is located at the second position, there is a first distance between the first portion and the surface of the photosensitive drum, and there is a second distance between the second portion and the surface of the photosensitive drum, wherein the first distance is greater than the second distance.

2. The developing cartridge according to claim 1, characterized in that: The first protrusion can receive the force of the drum cartridge to drive the developing roller to move from the first position to the second position.

3. The developing cartridge according to claim 1, characterized in that: A second protrusion is also included, which is located at the second side of the housing in the first direction, and when the second protrusion is supported by the drum cartridge, the first protrusion receives a force outside the developing cartridge to move the developing roller from the first position to the second position.

4. The developing cartridge according to claim 3, characterized in that: The electrical contact surface is fixedly disposed on the first side of the housing, and in the second direction, the second protrusion is located between the rotation axis of the developing roller and the electrical contact surface.

5. The developing cartridge according to claim 3, characterized in that: In the second direction, the second protrusion is closer to the fourth side of the housing than to the third side of the housing.

6. The developing cartridge according to claim 3, characterized in that: In the second direction, the second protrusion is closer to the third side of the housing than to the fourth side of the housing.

7. The developing cartridge according to claim 3, characterized in that: The developing roller includes a gel portion, the second protrusion is spaced apart from the gel portion in the first direction, and the second protrusion is farther from the first side of the housing than the gel portion of the developing roller.

8. The developing cartridge according to claim 3, characterized in that: The developing roller has a developing roller shaft, and the second protrusion is configured as a sleeve sleeved on the developing roller shaft.

9. The developing cartridge according to claim 8, characterized in that: The outer surface of the sleeve is configured to be arc-shaped, and when in the second position, the outer surface of the sleeve contacts the surface of the photosensitive drum.

10. The developing cartridge according to claim 2, characterized in that: The developing cartridge can be mounted to an electrophotographic imaging device; It also includes a second protrusion located on the second side of the shell in the first direction, and when the second protrusion is supported by the electronic photographic imaging device, the first protrusion receives a force outside the developing box to move the developing roller from the first position to the second position.

11. The developing cartridge according to claim 1, characterized in that: It also includes a locking portion, which cooperates with the drum box to prevent the developer box from being separated from the drum box when the developer box is installed in the drum box; the locking portion is located on the second side of the shell in the first direction, and in the second direction, the locking portion is closer to the fourth side of the shell relative to the third side.

12. The developing cartridge according to claim 1, characterized in that: It also includes a developing roller gear arranged at one end of the developing roller, and at least a first transmission gear and a second transmission gear are arranged between the input gear and the developing roller gear.

13. The developing cartridge according to claim 1, characterized in that: It also includes a stirring frame, a stirring frame gear arranged at one end of the stirring frame, and a third transmission gear connected between the input gear and the stirring frame gear. In the second direction, the rotation axis of the stirring frame gear is located between the rotation axis of the third transmission gear and the rotation axis of the input gear.

14. The developing cartridge according to claim 1, wherein: When the developing roller is located at the second position, the distance between the surface of the developing roller and the surface of the photosensitive drum gradually increases along the first direction from one end away from the first protrusion to the other end close to the first protrusion.

15. A developing cartridge, which can be detachably mounted in a drum cartridge having a photosensitive drum, the developing cartridge comprising: A housing for containing a developer, the housing having a first side and a second side separately arranged in a first direction, and the housing having a third side and a fourth side separately arranged in a second direction intersecting the first direction; a developing roller rotatable about a developing roller axis extending in the first direction, the developing roller being disposed on the third side of the housing in the second direction; an input gear, for receiving a driving force from outside the developing cartridge, the input gear being located on the first side of the housing in the first direction; a chip having an electrical contact surface, the electrical contact surface being located on the first side of the housing in the first direction; It is characterized by further comprising: a first protrusion, the first protrusion being located on the first side or the second side of the housing in the first direction; a second protrusion, the second protrusion being disposed on an opposite side of the first protrusion in the first direction; When the second protrusion is supported by the drum box, the first protrusion receives the force outside the developing box to move the developing roller from a first position to a second position, wherein the first position is a position where the developing roller contacts the photosensitive drum, and the second position is a position where at least a portion of the developing roller is separated from the photosensitive drum.

16. The developing cartridge according to claim 15, characterized in that: The second protrusion has a supported surface, and when the supported surface is supported by the drum cartridge, the first protrusion can receive a force outside the developing cartridge to move the developing roller around the supported surface from the first position to the second position.

17. The developing cartridge according to claim 15, characterized in that: The developing roller includes a colloid portion, and the second protrusions are spaced apart from the colloid portion in the first direction.

18. The developing cartridge according to claim 15, characterized in that: The developing roller has a developing roller shaft, and the second protrusion is configured as a sleeve sleeved on the developing roller shaft.

19. The developing cartridge according to claim 15, characterized in that: The first protrusion is located at the first side of the housing in the first direction, and the first protrusion can receive the force of the drum cartridge to drive the developing roller to move from the first position to the second position; The first protrusion at least partially overlaps with the developing roller when viewed along the first direction.

20. The developing cartridge according to claim 15, characterized in that: In the second direction, the second protrusion is closer to the fourth side of the housing than to the third side of the housing.

21. The developing cartridge according to claim 15, characterized in that: In the second direction, the second protrusion is closer to the third side of the housing than to the fourth side of the housing.

22. The developing cartridge according to claim 15, characterized in that: In the first direction, the first protrusion is located at the second side of the housing, and the first protrusion can receive the force of the drum cartridge to drive the developing roller to move from the first position to the second position; The first protrusion is movable relative to the housing.

23. The developing cartridge according to claim 22, characterized in that: The second protrusion is closer to the fourth side of the housing relative to the third side of the housing in the second direction.

Images