Developing box

Abstract

The embodiment of the utility model relates to the technical field of image forming devices, and discloses a developing box which comprises a box body used for containing a developing agent; a developing roller extending in a first direction; the forced pushing part is used for receiving the forced pushing force, so that the box body moves towards the direction close to the front end in a third direction, and the developing roller is in contact with a photosensitive drum of the drum frame; a storage medium storing information of the developing cartridge; an electrical contact surface electrically connected to the storage medium; and the abutting piece abuts against the drum frame, can generate elastic deformation in a third direction, and applies an acting force towards the rear end to the electric contact surface in the third direction. By means of the mode, the developing box can be installed in the drum frame in the third direction and installed in place.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of image forming devices, in particular to a developing cartridge. BACKGROUND

[0002] An image forming device of an electrophotographic method is provided with a developing cartridge that develops an electrostatic latent image on a photosensitive drum using a developer. The developing cartridge has a developing roller that is rotatably supported in a cartridge body, and develops by supplying the developer accommodated in the cartridge body from the developing roller to the photosensitive drum.

[0003] In order to facilitate the image forming device to recognize the model, capacity and other information of the developing cartridge, a storage unit is usually arranged on the developing cartridge. When there is no printing task, the developing roller on the developing cartridge needs to be separated from the photosensitive drum to avoid unnecessary developer being transferred to the paper. After the developing cartridge is installed in the drum frame of the image forming device, the developing roller cannot be in contact with the photosensitive drum. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the embodiment of the present application provides a developing cartridge, which has a first end and a second end arranged oppositely in a first direction, has a third end and a fourth end arranged oppositely in a second direction, and has a fifth end and a sixth end arranged oppositely in a third direction, and characterized in that the developing cartridge comprises a cartridge body, a developing roller, an electrical contact surface, a pushing part and an abutting piece; the cartridge body is used for accommodating a developer; the developing roller is arranged on the cartridge body and extends along the first direction; the electrical contact surface is fixed relative to the cartridge body and faces the rear in the third direction, and is arranged in the second direction with the developing roller; the pushing part is used for receiving a pushing force to move the cartridge body and make the developing roller contact the photosensitive drum forward in the third direction; and the abutting piece is in abutment with the drum frame and can be elastically deformed in the third direction to apply a force to the electrical contact surface towards the rear end in the third direction.

[0005] Optionally, in the second direction, the distance from the abutting piece and the electrical contact surface to the developing roller is greater than the distance from the pushing part to the developing roller.

[0006] Optionally, the abutting piece and the electrical contact surface are located at the same end in the first direction.

[0007] Optionally, the pushing part, the abutting piece and the electrical contact surface are located at the same end in the first direction.

[0008] Optionally, the developing cartridge further comprises a bracket, the bracket is fixedly installed on the cartridge body, and the electrical contact surface is fixedly installed on the bracket; the abutting piece comprises an elastic piece and a first abutting piece, the elastic piece extends in the third direction, the first abutting piece is slidably connected with the bracket, and the first abutting piece can slide in the third direction.

[0009] Optionally, the developing cartridge has opposite first and second ends in the first direction, opposite third and fourth ends in the second direction, and opposite fifth and sixth ends in the third direction; the developing roller is located at the third end, the electrical contact surface is closer to the fourth end than the developing roller, and the urging member in the second direction is located between the electrical contact surface and the developing roller.

[0010] Optionally, in the first direction, the distance from the abutting member to the electrical contact surface is smaller than the distance from the second urging portion to the electrical contact surface.

[0011] Optionally, the abutting member is closer to the front of the developing cartridge than the electrical contact surface and the urging portion in the third direction.

[0012] Optionally, the developing cartridge further comprises an electrode, the electrode comprising a developing electrode or a powder feeding electrode, and the projection of the abutting member in the second direction overlaps the electrode.

[0013] Optionally, the developing cartridge further comprises a bracket fixedly installed on the cartridge body, and the electrical contact surface is fixedly installed on the bracket; the abutting member comprises an elastic member and a first abutting member, the elastic member extends in the third direction, and the first abutting member is slidably connected with the bracket and can slide in the third direction.

[0014] The embodiment realizes that the developing cartridge can be installed into the drum frame in the third direction and be installed in place. In addition, it also realizes that the identification assembly can still maintain electrical contact with the identification medium during the process that the developing cartridge receives the urging force to make the developing roller contact the photosensitive drum.

[0015] The above description is only a summary of the technical solutions of the present application. In order to enable one of ordinary skill in the art to better understand the technical means of the present application and implement it according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Moreover, the same reference numerals in the attached drawings indicate the same or similar components. In the drawings:

[0017] Figure 1 A structure schematic diagram of the developing cartridge provided by the embodiment installed in the drum frame is shown;

[0018] Figure 2 A partial cross-sectional structure schematic diagram of the developing cartridge provided by the embodiment installed in the drum frame is shown;

[0019] Figure 3 、 Figure 4 andFigure 6 Fig. 6 shows a perspective structural schematic view of the developing cartridge provided by the embodiment from different angles;

[0020] Figure 5 Fig. 7 shows a partial exploded structural schematic view of the first end of the developing cartridge provided by the embodiment;

[0021] Figure 7 Fig. 8 shows a partial exploded structural schematic view of the second end of the developing cartridge provided by the embodiment;

[0022] Figure 8 Fig. 9 shows a projection structural schematic view of the second end of the developing cartridge provided by the embodiment;

[0023] Figure 9 Fig. 10 shows a structural schematic view of the identification assembly in the developing cartridge provided by the embodiment. DETAILED DESCRIPTION

[0024] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising" and "having," and any variations thereof, as used in the specification and claims and the aforementioned drawings, are intended to cover not exclusive inclusions.

[0026] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0027] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the existence of A, the existence of A and B, and the existence of B. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0029] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0030] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0031] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0032] For the convenience of description, the embodiments take the left-right direction as the first direction, the up-down direction as the second direction, and the front-rear direction as the third direction, which does not constitute a limitation. Please refer to Figures 1 to 7 , the developing cartridge has a first end 11 and a second end 12 arranged oppositely in the left-right direction, a third end 13 and a fourth end 14 arranged oppositely in the up-down direction, and a fifth end 15 and a sixth end 16 arranged oppositely in the front-rear direction. The developing cartridge 1 is installed in the drum frame 5 from top to bottom. The drum frame 5 is provided with four accommodating cavities 50 for installing developing cartridges of different colors. The drum frame 5 is provided with a photosensitive drum 51, a drum urging 52 and an identification medium 53 at the corresponding position of each accommodating cavity 50. The accommodating cavity 50 is formed between the photosensitive drum 51 and the drum urging 52. The photosensitive drum 51 extends along the left-right direction and is rotatably supported on the drum frame 5. The drum urging 52 can be elastically deformed. The drum frame 5 is installed on the image forming device.

[0033] The developing cartridge 1 includes a cartridge body 10, a powder filling port 101, a powder discharge blade 132, a developing roller 131, a powder feeding roller, a stirring frame, a transmission assembly, a cover 111, an electrode 30, a pushing portion 21, a separating portion 31 and an identification assembly. The cartridge body 10 is used to contain the developer. The powder filling port 101 is used to supplement the developer into the cartridge body 10. The developing roller 131, the powder feeding roller and the stirring frame all extend along a first direction, and both ends thereof are rotatably supported on the cartridge body 10. The stirring frame stirs the developer in the cartridge body 10 to prevent the developer from loosening. The powder feeding roller is in contact with the developing roller 131 and generates friction to make the developing roller 131 receive the charged developer. The powder discharge blade 132 extends along the first direction and is in contact with the outer periphery of the developing roller 131 to limit the layer thickness of the developer on the developing roller. The developing roller 131 is located at a third end 13 of the cartridge body 10 in the up-down direction, and the developing roller 131 is in contact with the photosensitive drum 51 on the drum frame 5 to deliver the charged developer to the photosensitive drum 51.

[0034] The transmission assembly and the cover 111 are arranged at the first end 11 of the cartridge body 10, and the cover 111 covers at least a part of the transmission assembly to protect the transmission assembly, and the cover is detachably mounted on the cartridge body 10 by a threaded connection. The transmission assembly includes a driving portion 112, a developing gear 113, a powder feeding gear, an idler gear 114 and a stirring gear 115. The driving portion 112 includes a power receiving portion 1121 and a driving gear 1122 arranged coaxially, the power receiving portion 1121 is exposed through a mounting hole on the cover 111, and the power receiving portion is also exposed to a mounting hole on the drum frame 5 to receive the driving force of the image forming apparatus. The developing gear 113, the powder feeding gear and the idler gear 114 are respectively engaged with the driving gear 1122, and the stirring gear 115 is engaged with the idler gear. When the power receiving portion 1121 receives the first driving force, the developing gear 113, the powder feeding gear, the idler gear 114 and the stirring gear 115 are driven to rotate together. The developing gear 113 is mounted at one end of the developing roller 131 to drive the developing gear 113 to rotate together. The powder feeding gear is mounted at one end of the powder feeding roller to drive the powder feeding roller to rotate together. The stirring gear 115 is mounted at one end of the stirring frame to drive the stirring frame to rotate.

[0035] The electrode 30 is electrically connected with the power output portion of the image forming apparatus to transmit electricity to the developing roller 131 and the powder feeding roller. The electrode 30 is arranged at the second end 12 of the developing cartridge, and the electrode 30 includes a developing electrode 31 formed in a protruding shape and electrically connected with the power output portion and connected with one end of the developing roller 131, and the electrode 30 is formed in a bracket shape, and the developing electrode 31 is formed on the bracket-shaped electrode 30, and the electrode 30 is formed with a bearing 32 supporting one end of the powder feeding roller, and the bearing 32 can also conduct electricity to the powder feeding roller, and the bearing 32 is a powder feeding electrode.

[0036] The urging portion 21 is configured to apply an urging force to the cartridge to bring the developing roller 131 into contact with the photosensitive drum. The urging portion 21 includes a first urging portion 211 disposed at the first end 11 of the cartridge 10 and a second urging portion 212 disposed at the second end 12 of the cartridge 10. The first urging portion 211 and the second urging portion 212 are configured in the same manner, and the second urging portion 212 will be described below as an example. When the developing cartridge 1 is installed in the accommodating cavity 50 of the drum frame 5 from top to bottom, the developing roller 131 is located behind the photosensitive drum 51 in the front-rear direction, and the drum urging portion 52 is located behind the second urging portion 212 in the front-rear direction. The second urging portion 212 is configured to receive the forward urging force of the drum urging portion 52 to move the cartridge 10 forward, so that the developing roller 131 is in contact with and remains in contact with the photosensitive drum 51. Specifically, the first urging portion 211 is recessed forward from the cartridge 10 to accommodate the drum urging portion 52 and receive the forward urging force of the drum urging portion 52. In some embodiments, a second cover or bracket can also be provided at the second end 12 of the cartridge 10, and the second urging portion 212 is indirectly disposed on the cartridge 10 through the second cover or bracket. The first urging portion 211 can also be indirectly disposed on the cartridge 10 through the cover 111 of the first end 11. In this embodiment, the urging portion 21 is provided at both ends of the cartridge, so that the forces at both ends of the cartridge in the first direction are balanced, and the developing roller 131 remains in contact with the photosensitive drum 51 at both ends in the first direction. In some embodiments, the urging portion 21 can also be provided only at one end of the cartridge 10.

[0037] The image forming device is provided with a separating force output element at a position corresponding to the accommodating cavity of each drum frame. When the image forming device does not need a certain color of developer, the separating force output element at a position corresponding to the developing cartridge of the certain color of developer of the image forming device extends in the first direction. The separating part 31 of the developing cartridge is used to apply a separating force to the cartridge body, so that the developing roller 131 is separated from the photosensitive drum 51. The separating part 31 is arranged at the first end 11 of the cartridge body, and the separating part 31 receives the separating force of the separating force output element extending in the first direction in the rear direction, so that the cartridge body 10 moves rearward in the front-rear direction against the urging force provided by the urging part 21, and the developing roller 131 is separated from the photosensitive drum 51. The separating part 31 is arranged at the cover 111 and indirectly arranged at the cartridge body 10, and the separating part 31 extends in the direction away from the cartridge body 10 in the first direction. The separating part 31 has a separating inclined surface 311 extending in the first direction towards the cartridge body 10 and extending in the front-rear direction towards the fifth end 15, and the separating inclined surface 311 is arranged to facilitate the separating part 31 to receive the separating force of the separating force output element, so that the developing cartridge moves rearward towards the sixth end 16, i.e. rearward, so that the developing roller 131 is separated from the photosensitive drum 51. The separating inclined surface 311 is an inclined plane, and can also be a curved surface. The separating part 31 can also be formed integrally with the cartridge body. When the image forming device needs a certain color of developer, the separating force output element is retracted in the first direction, and the separating part 31 loses the abutment of the separating force output element. Under the urging force received by the urging part 21, the cartridge body 10 moves forward, and the developing roller 131 is in contact with the photosensitive drum 51 again.

[0038] The identification component is in electrical contact with the identification medium 53 on the drum frame 5, so that the image forming device identifies the information of the developing cartridge. The identification component is arranged at the second end 12 of the cartridge body. During the process that the cartridge body 10 moves forward under the urging force received by the urging part 21 and the developing roller 131 is in contact with the photosensitive drum 51, the urging force received by the urging part 21 is forward, and the identification component needs to be in contact with the identification medium 53 in the rearward direction, which causes the identification component to be out of contact with the identification medium 53. Therefore, an abutting element is arranged at the second end 12 of the cartridge body, the abutting element is in abutment with the drum frame 5 and receives a rearward acting force, so that during the process that the developing roller 131 is in contact with the photosensitive drum 51 under the action of the urging part 21, the identification component can still maintain electrical contact with the identification medium 53.

[0039] But in the process of installing the developing cartridge 1 into the drum frame 5 from top to bottom, the developing cartridge is limited in size in the front-rear direction by the drum frame 5 or the abutting member, resulting in that the developing cartridge 1 cannot be installed into the drum frame 5 to the right position, even if the urging portion 21 applies a forward force, the developing roller 131 cannot be in contact with the photosensitive drum 51. By setting the abutting member which can be deformed elastically, the developing cartridge can be deformed in the front-rear direction, so that the developing cartridge 10 can be installed into the drum frame 5, when the developing cartridge receives the forward urging force so that the developing roller 131 is in contact with the photosensitive drum 51, the abutting member is in abutment with the drum frame 5 and releases the elastic force extension, so that the cartridge body 10 and the electric contact surface 44 of the identification assembly receive the force towards the rear end, so that the electric contact surface 44 can still be in electric contact with the identification medium 53 of the drum frame 5.

[0040] Please refer to Figure 7 The identification assembly is arranged at the second end 12 of the developing cartridge, including a bracket 41, an abutting member, a storage medium 44 and an electric contact surface 45. The storage medium 44 stores information of the developing cartridge, and is fixedly installed on the bracket 41. The electric contact surface 45 is formed on the storage medium 44, and is used for electric contact with the identification medium 53, so that the image forming apparatus identifies the information of the storage medium 44. The storage medium 44 is, for example, a chip, and the electric contact surface 45 can be specifically a terminal. The abutting member includes an elastic member 42 and a first abutting member 43. The bracket 41 is detachably installed at the second end 12 of the cartridge body 10, the first abutting member 43 is slidably connected to the bracket 41, and the elastic member 42 is in abutment between the bracket 41 and the first abutting member 43. The first abutting member 43 can slide relative to the bracket 41 in the front-rear direction, the elastic member 42 extends in the front-rear direction, and the elastic member 42 is compressed or stretched in the front-rear direction with the sliding of the first abutting member 43. When the developing cartridge is installed into the drum frame 5, the first abutting member 43 is in abutment with the drum frame 5 and receives a rearward force, the first abutting member 43 compresses the elastic member 42 and slides rearward relative to the bracket 41, so that the developing cartridge can be installed into the drum frame 5 in the up-down direction and to the right position.

[0041] The first abutting member 43 is closer to the front of the cartridge 10 than the storage medium 44, the electrical contact surface 45 and the second pushing portion 212 in the front-rear direction, facilitating the abutting of the first abutting member 43 with the drum frame 5 and providing a rearward force to the electrical contact surface 45. The electrical contact surface 44 and the first abutting member 43 are closer to the fourth end 14 of the developing cartridge than the second pushing portion 212 in the up-down direction, i.e. the distance from the abutting member and the electrical contact surface 44 to the developing roller 131 is greater than the distance from the pushing portion 21 to the developing roller 131 in the second direction, so that the force of the first abutting member 43 on the electrical contact surface 44 in the rearward direction and the pushing force of the second pushing portion 212 on the cartridge 10 in the forward direction can be staggered in the up-down direction, ensuring that the developing roller 131 is in contact with the photosensitive drum and that the electrical contact surface 44 is in electrical contact with the recognition medium 53. The projection of the first abutting member 43 in the up-down direction overlaps the electrode 30, facilitating the abutting of the first abutting member 43 with the drum frame 5.

[0042] The bracket 41 is formed with a recess for mounting the storage medium 43 at the rear in the front-rear direction. The bracket 41 is provided with a mounting cavity 413 for mounting the elastic member 42 and the first abutting member 43. The elastic member 42 is accommodated in the mounting cavity 413 and extends in the front-rear direction and is limited by the mounting cavity 413 on all sides, so as to ensure that the elastic member 42 is compressed or stretched in a predetermined direction. The first abutting member 43 has an abutting portion 431 for abutting with the drum frame 5. The side wall of the first abutting member 43 is formed with a clamping portion 432, and the side wall of the mounting cavity 413 is formed with a clamping matching portion 4131, and the clamping portion 432 and the clamping matching portion 4131 are matched to prevent the first abutting member 43 from falling off. The two clamping portions 432 are symmetrically arranged on the two side walls of the first abutting member 43, so that the cooperation between the first abutting member 43 and the bracket 41 is more stable. The elastic member 42 and the first abutting member 43 are mounted on the bracket 41 along the front-rear direction. When the first abutting member 43 is removed, an inward force can be applied to the clamping portion 432 towards the inside of the bracket 41, so that the clamping portion 432 is inwardly retracted, and the first abutting member can be removed. The elastic member 42 is preferably a spring.

[0043] The bracket 41 is detachably mounted on the cartridge 10. Specifically, the bracket 41 is provided with a plug-in portion 412, and the cartridge 10 is provided with a plug-in matching portion 122, and the bracket 41 is mounted on the cartridge 10 by plugging the plug-in portion 412 into the plug-in matching portion 122. The plug-in portion 412 has a buckle 4121 which can be clamped with the side wall of the plug-in matching portion 122 to prevent the bracket 41 from falling off. The bracket 41 is also provided with a first mounting hole 411, and the cartridge 10 is also provided with a first matching hole 121, and the bracket is mounted on the cartridge 10 by being threaded through the first mounting hole 411 and the first matching hole 121 with a threaded fastener such as a screw. The bracket 41 is mounted on the cartridge 10 along the first direction.

[0044] In the embodiment, the first abutting member 43 slides relative to the bracket 41 in a direction substantially parallel to the front-rear direction of the cartridge 10. In some embodiments, the first abutting member 43 slides relative to the bracket 41 in a direction inclined relative to the front-rear direction, which is also a case that the first abutting member 43 slides relative to the bracket 41 in the front-rear direction. In some embodiments, the electrical contact surface 44 of the storage medium is mounted to the bracket 41, the bracket 41 is mounted to the cartridge 10, and the first abutting member 43 is directly mounted to the cartridge 10 and in sliding connection with the cartridge 10. In some embodiments, the bracket 41 can also be formed integrally with the cartridge 10, and the first abutting member 43 is slidably mounted to the bracket 41. In the embodiment, the elastic member 42 is elastic, which can be a spring 42 or a deformable plastic member. In some embodiments, the abutting member can also be a plastic member or a metal sheet such as a steel sheet that can elastically deform in the front-rear direction. In the embodiment, the first abutting member extends through the electrical contact surface 44 in the front-rear direction, so that the electrical contact surface 44 can more reliably receive the force acting in the rear direction. In some embodiments, the first abutting member 43 can also not extend through the electrical contact surface 44. In some embodiments, the abutting member can also be arranged at a position in front of the cartridge, such as a position in the middle of the front. In the embodiment, the abutting member is closer to the second end than to the first end relative to the electrical contact surface 44, so that the abutting member can more easily apply a force to the electrical contact surface 44 in the rear direction. In some embodiments, the electrical contact surface 44 can also be arranged at the second end, and the abutting member can be arranged at the first end 11.

[0045] In the embodiment, the electrical contact surface 45, the storage medium 44, and the bracket 41 are fixed relative to the cartridge 10, which is simple. In some embodiments, the electrical contact surface 45 is fixed to the bracket 41, the storage medium 44 is mounted to the cartridge 10, and the electrical contact surface 45 is electrically connected to the storage medium 44 through an intermediate medium such as a wire. In some embodiments, the electrical contact surface 45 and the storage medium 44 can be directly mounted to the cartridge. In the embodiment, the second pushing portion 212 and the abutting member are closer to the electrical contact surface 44 at the second end 12 than to the first end 11, so that the abutting member can well balance the force applied by the second pushing portion 212 in the front direction, and the electrical contact surface 44 can reliably receive the force acting in the rear direction to maintain contact with the identification medium 53. In some embodiments, in the first direction, the abutting member is closer to the electrical contact surface 44 than the second pushing portion 212, i.e., the distance from the abutting member to the electrical contact surface 44 is smaller than the distance from the second pushing portion 212 to the electrical contact surface 44, so that the electrical contact surface 44 can also reliably receive the force acting in the rear direction to maintain contact with the identification medium 53. In some embodiments, the abutting member can also be closer to the first end 11 than to the second end 12, and the second pushing portion 212 can be closer to the second end 12 than to the abutting member.

[0046] The abutting piece deforms elastically, so that the developing cartridge can deform in the front-rear direction, and the developing cartridge 10 can be installed downward into the drum frame 5. When the developing cartridge receives a forward pushing force so that the developing roller 131 contacts the photosensitive drum 51, the abutting piece abuts against the drum frame 5 and releases the elastic force to stretch, so that the cartridge body 10 and the electric contact surface 44 of the recognition assembly receive a force toward the rear end, so that the electric contact surface 44 can still maintain electric contact with the recognition medium 53 of the drum frame 5.

[0047] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A developing cartridge, characterized in that, include: The container is used to hold the developer; A developing roller is disposed on the cartridge body and extends along a first direction; The electrical contact surface is fixed relative to the housing and faces rearward in a third direction, arranged with the developing roller in a second direction; A pushing section is used to receive a pushing force to move the cartridge body and make the developing roller contact the photosensitive drum in a third-direction forward direction; The abutting member, which abuts against the drum frame, can undergo elastic deformation in the third direction and apply a force toward the rear end to the electrical contact surface in the third direction.

2. The developing cartridge according to claim 1, characterized in that, In the second direction, the distance from the abutment and the electrical contact surface to the developing roller is greater than the distance from the pushing part to the developing roller.

3. The developing cartridge according to claim 1 or 2, characterized in that, The abutment and the electrical contact surface are located at the same end in a first direction.

4. The developing cartridge according to claim 3, characterized in that, The pushing part, the abutting member, and the electrical contact surface are located at the same end in a first direction.

5. The developing cartridge according to claim 4, characterized in that, The developing cartridge also includes a bracket, which is fixedly installed on the cartridge body, and the electrical contact surface is fixedly installed on the bracket; The abutment includes an elastic member and a first abutment. The elastic member extends upward in a third direction, and the first abutment is slidably connected to the bracket and can slide upward in a third direction.

6. The developing cartridge according to claim 4, characterized in that, The developing cartridge has a first end and a second end opposite to each other in a first direction, a third end and a fourth end opposite to each other in a second direction, and a fifth end and a sixth end opposite to each other in a third direction. The developing roller is located at the third end, the electrical contact surface is closer to the fourth end than the developing roller, and the pushing part is located between the electrical contact surface and the developing roller in the second direction.

7. The developing cartridge according to claim 1 or 2, characterized in that, In the first direction, the distance from the abutment to the electrical contact surface is smaller than the distance from the pusher to the electrical contact surface.

8. The developing cartridge according to claim 1 or 2, characterized in that, The abutment is located closer to the front of the developing cartridge in a third-party orientation than the electrical contact surface and the pushing portion.

9. The developing cartridge according to claim 1 or 2, characterized in that, The developing chamber also includes electrodes, which include developing electrodes or powder feeding electrodes, and the projection of the abutment in the second direction overlaps with the electrodes.

10. The developing cartridge according to claim 1 or 2, characterized in that, The developing cartridge also includes a bracket, which is fixedly installed on the cartridge body, and the electrical contact surface is fixedly installed on the bracket; The abutment includes an elastic member and a first abutment. The elastic member extends upward in a third direction, and the first abutment is slidably connected to the bracket and can slide upward in a third direction.

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