CN220208100U - Developing cartridge, process cartridge, and image forming apparatus - Google Patents

Abstract

The utility model provides a processing box and an image forming device thereof, wherein the processing box comprises a photosensitive box and a developing box which is detachably arranged in the photosensitive box, the photosensitive box comprises a waste powder bin, an end cover which is arranged at least one end part of the waste powder bin and a photosensitive drum which is arranged at an inlet of the waste powder bin; the developing cartridge includes a hopper and a developing roller mounted to an outlet of the hopper; the end part of the end cover is connected with a rear side bracket, and when the developing box is mounted to the photosensitive box, the rear side bracket can rotationally press against the developing box; through setting up rotatory rear side support, after the developing box is installed to the photosensitive box, can be through the rotatory first of pressing on the developing box that pushes away of second on the rear side support push away the piece to make developing roller and photosensitive drum close fit, avoid developing roller and photosensitive drum to have great clearance and the printing image that leads to appear the quality problem.

Description

Developing cartridge, process cartridge, and image forming apparatus

Technical Field

The present utility model relates to the field of image forming apparatuses, and more particularly, to a developing cartridge, a process cartridge, and an image forming apparatus thereof.

Background

Currently, consumable components, optical scanning components, developing components, control components, and the like are generally provided within an image forming apparatus. One of the most used consumables among the consumable components is a process cartridge. The process cartridge is divided into an integral type or a separate type, and the integral type process cartridge simultaneously integrates the photosensitive drum and the developing roller, and has a compact overall structure, a small occupied volume, and a large amount of developer inside the process cartridge cannot be stored due to the structure, so that it is necessary to frequently replace a new integral type process cartridge or manually inject the developer into the integral type process cartridge. However, even after the developer of the integrated process cartridge is consumed, the service lives of the photosensitive drum and the developing roller inside the integrated process cartridge are not yet finished, so that the integrated process cartridge can be continuously used by manually injecting the developer only in view of structural integrity. However, the manual operation of injecting the developer into the integrated processing box is performed by a professional, and the developer is slightly toxic, and if the developer is injected into the integrated processing box by a user who does not have professional training on the premise of no professional equipment or tools, the developer may be blown out, causing misfeeding or missucking, and having a certain potential safety hazard. And to this problem, designed a split type processing box, it divide into drum subassembly and developing assembly, namely the photosensitive drum of drum subassembly and developing assembly's developing roller carry out detachable connection promptly, inject into the developer in developing assembly simultaneously, its occupied volume is usually great, for integral type processing box, can store more developer, even after the developer finishes using, the user only need with developing assembly change can, need not to change drum subassembly, it is more convenient to use, and do benefit to the environmental protection and practice thrift.

In the printing process, the matching requirement of the developing roller and the photosensitive drum is extremely high, and the matching clearance between the developing roller and the photosensitive drum directly relates to the quality of printing. The existing split type processing box needs to ensure the fit clearance between the developing roller and the photosensitive drum because the developing component and the drum component are detachably connected, the developing component provided with the developing roller is always pushed towards the direction of the drum component provided with the photosensitive drum by using a forcing mechanism and the like, the set thrust is larger, the local part of the split type processing box is subjected to larger forcing reaction force, and if the resin frame of the processing box is not supported with enough strength, the deformation can be generated. In addition, if the urging force is set too small, the nip force between the developing roller and the photosensitive drum is too small, which affects the print quality, causing the image to become blurred. Meanwhile, there are cases where the developing assembly is mounted to or dismounted from the drum assembly, affecting the user's use experience.

Disclosure of Invention

The utility model provides a developing box, a processing box and an image forming device thereof, which are used for solving the problems of poor printing quality caused by integral deformation of the processing box or smaller forcing force due to larger forcing force due to relatively complex forcing mechanism and unreasonable forcing force provided by the forcing mechanism in the related art.

The utility model provides a developing box, which is detachably mounted to a photosensitive box, wherein the photosensitive box can be detachably mounted into an image forming device, the photosensitive box comprises a waste powder bin, an end cover mounted to at least one end part of the waste powder bin and a photosensitive drum mounted to an inlet of the waste powder bin, a channel is arranged on the end cover, the developing box comprises a powder bin and a developing roller mounted to an outlet of the powder bin, and at least one end part of the powder bin is provided with a first limit bulge and a second limit bulge for mounting the developing box; when the developing cartridge is mounted to the photosensitive cartridge, the second limit protrusion is guided to pass through the channel and is pressed against the end cover opposite to the first limit protrusion.

Further, the included angle of the first limiting protrusion to the horizontal plane of the first pressure of the end cover in the first direction is a right angle or an acute angle; and the included angle of the second limiting protrusion to the horizontal plane of the second pressure of the end cover in the first direction is a right angle or an acute angle.

Further, the horizontal distance L1 of the photosensitive drum of the first spacing protrusion in the first direction is smaller than the horizontal distance L2 of the photosensitive drum of the second spacing protrusion in the first direction.

Further, one side of the first limiting protrusion and one side of the second limiting protrusion, which are close to the photosensitive drum, are cambered surfaces or straight surfaces.

Further, at least one first pushing member extending in the second direction is disposed on a side portion of the powder bin away from the developing roller, and when the developing cartridge is mounted to the photosensitive cartridge, the first pushing member is guided to abut against at least a portion of the photosensitive cartridge.

Further, the first pushing piece is of a trapezoid table structure.

The present utility model also provides a process cartridge detachably mountable to an image forming apparatus, the process cartridge including a developing cartridge and a photosensitive cartridge, the photosensitive cartridge including a waste toner hopper, an end cap mounted to at least one end of the waste toner hopper, and a photosensitive drum mounted to an inlet of the waste toner hopper, the end cap being provided with a passage, characterized in that the developing cartridge includes a toner hopper and a developing roller mounted to an outlet of the toner hopper, at least one end of the toner hopper being provided with a first spacing protrusion and a second spacing protrusion for mounting the developing cartridge; when the developing cartridge is mounted to the photosensitive cartridge, the second limit protrusion is guided to pass through the channel and is pressed against the end cover opposite to the first limit protrusion.

Further, the width of the channel along the first direction is greater than or equal to the length of the second limiting protrusion along the first direction.

Further, a chamfer is arranged at the opening edge of the channel.

Further, the end spacing L3 of the end cover near the photosensitive drum gradually increases in the first direction.

Further, the end cover is pivotally connected with a rear side bracket, and the rear side bracket is provided with at least one second pushing member extending in a second direction, and when the developing cartridge is mounted on the photosensitive cartridge, the second pushing member is guided to be pressed against at least a part of the developing cartridge.

Further, the second pushing piece is of a trapezoid table structure.

The utility model also provides an image forming device, wherein the processing box according to the scheme is detachable in the image forming device.

After the technical scheme is adopted, 1, two groups of opposite pushing parts are respectively arranged on the developing box and the photosensitive box, so that the developing box can have pushing force to the photosensitive box, further the developing roller is tightly matched with the photosensitive drum, and the quality problem of a printed image caused by a large gap between the developing roller and the photosensitive drum is avoided; 2. through the cooperation of first spacing arch, the spacing arch of second and passageway, make the developing box can install fast to the photosensitive box on, promote user's use experience, when guaranteeing developing box quick installation, dismantlement, restrict the relative distance of developing box and photosensitive box, and then restrict the relative distance of developing roller and photosensitive drum to prevent that the processing box warp.

Drawings

FIG. 1 is a schematic view of a process cartridge according to some embodiments of the present utility model;

FIG. 2 is a schematic view of a developer cartridge according to some embodiments of the present utility model in a first state removed from a photosensitive cartridge;

FIG. 3 is a schematic view illustrating a second state in which a developing cartridge is removed from a photosensitive cartridge according to some embodiments of the present utility model;

FIG. 4 is a schematic view illustrating a third configuration of a developer cartridge according to some embodiments of the present utility model when the developer cartridge is removed from the photosensitive cartridge;

FIG. 5 is a schematic view of another embodiment of a developing cartridge according to the present utility model in a second state of being removed from a photosensitive cartridge;

FIG. 6 is an exploded view of a photosensitive cartridge of a process cartridge according to some embodiments of the present utility model;

FIG. 7 is a schematic view of a photosensitive cartridge of a process cartridge according to some embodiments of the present utility model;

FIG. 8 is a schematic view of an end cap of a photosensitive cartridge of a process cartridge according to some embodiments of the present utility model;

FIG. 9 is a partial cross-sectional view of a process cartridge according to some embodiments of the present utility model;

FIG. 10 is a schematic view of a rear side frame of a photosensitive cartridge of a process cartridge according to some embodiments of the present utility model;

FIG. 11 is a cross-sectional view of a process cartridge according to some embodiments of the present utility model;

FIG. 12 is an enlarged view of a portion of FIG. 11 at A;

fig. 13 is another schematic structural view of a process cartridge according to some embodiments of the present utility model.

Reference numerals:

10. a light-sensitive box;

101. a waste powder bin;

102. an end cap; 1021. a channel; 1022. a positioning pin; 1023. positioning the bulge; 1024. a limit part; 1025. a groove; 1026. a first end cap; 1027. a second end cap;

103. a rear side bracket; 1031. a graspable portion; 1032. a clamping groove; 1033. a second urging member; 10331. a second abutment surface; 10332. a second engagement surface; 1034. a support; 1035. a limit column; 1036. positioning columns; 1037. an extension; 1038. slotting;

20. a developing cartridge;

201. a powder bin;

202. a first urging member; 2021. a first engagement surface; 2022. a first abutment surface;

203. a grip;

204. the first limiting protrusion;

205. the second limiting bulge;

D. a developing roller;

p, photosensitive drum.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the utility model have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", and the like used in the embodiments of the present utility model indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or an azimuth or the positional relationship that a product of this embodiment conventionally puts in use, are merely for convenience of describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the embodiments of the present utility model.

The terms "first," "second," and the like, as used in embodiments of the present utility model, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Nor does the terms "a," "an," or "the" or similar terms mean a limitation of quantity, but rather that at least one is present. Likewise, the word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The steps preceding or following the methods of embodiments of the present utility model are not necessarily performed in a sequential order. Rather, the various steps may be processed in reverse order or simultaneously. Also, other operations may be added to or removed from these processes.

At least one embodiment of the present utility model provides a developing cartridge 20, the developing cartridge 20 being detachably mounted to a photosensitive cartridge 10, the photosensitive cartridge 10 being detachably mountable to an image forming apparatus, the photosensitive cartridge 10 including a waste toner hopper 101, an end cap 102 mounted to at least one end of the waste toner hopper 101, and a photosensitive drum P mounted to an inlet of the waste toner hopper 101, the end cap 102 being provided with a passage 1021, the developing cartridge 20 including a toner hopper 201 and a developing roller D mounted to an outlet of the toner hopper 201, at least one end of the toner hopper 201 being provided with a first stopper protrusion 204 and a second stopper protrusion 205 for mounting the developing cartridge 20; when the developing cartridge 20 is mounted to the photosensitive cartridge 10, the second limiting projection 205 is guided to pass through the passage 1021 and to be pressed against the end cap 102 opposite to the first limiting projection 204.

At least one embodiment of the present utility model provides a process cartridge detachably mountable to an image forming apparatus, the process cartridge including a developing cartridge 20 and a photosensitive cartridge 10, the photosensitive cartridge 10 including a waste toner hopper 101, an end cap 102 mounted to at least one end of the waste toner hopper 101, and a photosensitive drum P mounted to an inlet of the waste toner hopper 101, the end cap 102 being provided with a passage 1021, characterized in that the developing cartridge 20 includes a toner hopper 201 and a developing roller D mounted to an outlet of the toner hopper 201, at least one end of the toner hopper 201 being provided with a first stopper protrusion 204 and a second stopper protrusion 205 for mounting the developing cartridge 20; when the developing cartridge 20 is mounted to the photosensitive cartridge 10, the second limiting projection 205 is guided to pass through the passage 1021 and to be pressed against the end cap 102 opposite to the first limiting projection 204.

At least one embodiment of the present utility model provides an image forming apparatus in which the process cartridge described in the above embodiment is detachable.

The developing cartridge 20, the processing cartridge and the image forming apparatus thereof according to the above embodiment of the present utility model have the advantages that by respectively arranging two sets of opposite urging members on the developing cartridge 20 and the photosensitive cartridge 10, the developing cartridge 20 can have urging force to the photosensitive cartridge 10, and further, the developing roller D is tightly matched with the photosensitive drum P, so that quality problems of printed images caused by a large gap between the developing roller D and the photosensitive drum P are avoided; through the cooperation of the first spacing protrusion 204, the second spacing protrusion 205 and the channel 1021, the developing cartridge 20 can be quickly installed onto the photosensitive cartridge 10, the use experience of a user is improved, the relative distance between the developing cartridge 20 and the photosensitive cartridge 10 is limited while the developing cartridge 20 is quickly installed and dismounted, and the relative distance between the developing roller D and the photosensitive drum P is further limited, so that the deformation of the processing cartridge is prevented.

Embodiments of the present utility model and examples thereof are described in detail below with reference to the attached drawings.

As shown in fig. 1, a developing cartridge 20, the developing cartridge 20 is detachably mounted to a photosensitive cartridge 10, the photosensitive cartridge 10 is detachably mountable to an image forming apparatus, the photosensitive cartridge 10 includes a waste toner hopper 101, an end cap 102 mounted to at least one end of the waste toner hopper 101, and a photosensitive drum P mounted to an inlet of the waste toner hopper 101, a passage 1021 is provided on the end cap 102, the developing cartridge 20 includes a toner hopper 201 and a developing roller D mounted to an outlet of the toner hopper 201, at least one end of the toner hopper 201 is provided with a first stopper protrusion 204 and a second stopper protrusion 205 for mounting the developing cartridge 20; when the developing cartridge 20 is mounted to the photosensitive cartridge 10, the second limiting projection 205 is guided to pass through the passage 1021 and to be pressed against the end cap 102 opposite to the first limiting projection 204.

In the present embodiment, the end caps 102 are provided in two. One end of each of the two specific end caps 102 is symmetrically disposed at two sides of the waste bin 101 of the photosensitive cartridge 10, and the other end of each of the two end caps 102 is pivotally connected to two ends of the rear support 103 along the second direction (Y), so that the photosensitive cartridge 10 forms a mounting space for mounting the developing cartridge 20 through the waste bin 101, the two end caps 102 and the rear support 103, and the whole mounting space can accommodate the developing cartridge 20, and further has an adjusting space for enabling the developing cartridge 20 to move a certain distance in the first direction (X) near one side of the photosensitive drum P before the mounting is completed. The user has more adjustment space in the process of installing the developing box 20 to the photosensitive box 10, so that the developing box 20 can be slightly adjusted according to actual conditions, the developing box 20 can be more prone to be close to the photosensitive box 10, namely the developing roller D is close to the photosensitive drum P, the structure is prevented from being too fixed, when the matching deviation occurs, the condition that adjustment cannot be performed occurs, and the stability of printing quality is ensured.

As shown in fig. 3 and 4, the first limiting protrusion 204 and the second limiting protrusion 205 are respectively disposed at ends of the powder bin 201 of the developing cartridge 20 in the second direction (Y), wherein the first limiting portion 1024 is closer to the top of the powder bin 201 of the developing cartridge 20 than the second limiting portion 1024 is to the second limiting portion 1024, and there is a distance L4 therebetween, the distance L4 being greater than or equal to the width of the end cap 102 in the third direction (Z).

As shown in fig. 4, in the process of installing the developing cartridge 20 to the photosensitive cartridge 10, the user first grips the grip 203 on the developing cartridge 20 and moves the developing cartridge 20 in the inclined downward posture to the upper side of the photosensitive cartridge 10 in the first direction (X), then, when the second limit projection 205 on the cartridge 201 moves to the position right above the channel 1021 of the end cap 102, the user keeps the same posture of the developing cartridge 20 and moves the developing cartridge 20 to the lower side of the third direction (Z) until the second limit projection 205 can move to the opening of the channel 1021, at this time, the movement of the developing cartridge 20 to the lower side of the third direction (Z) is continued, the second limit projection 205 moves along the length direction of the channel 1021 and next to the inner wall of the channel 1021 until the second limit projection 205 moves out of the outlet of the channel 1021, and then, the user moves the developing cartridge 20 to the installation direction of the developing cartridge 20 (the side of the first direction (X) next to the drum P side) so that the second limit projection 205 is completely separated from the channel 1021 to prevent the situation that the second limit projection is separated from the photosensitive cartridge 1021 from the lower side of the channel 10 again, and the situation occurs from the normal condition of the photosensitive cartridge 10.

As shown in fig. 2, in some embodiments, the end spacing L3 of the end cap 102 adjacent to the photosensitive drum P becomes gradually larger in the first direction (X). Specifically, the photosensitive cartridge 10 is placed on a horizontal plane, and the end cap 102 of the photosensitive cartridge 10 is projected from the second direction (Y), the spacing L3 between both side edges of the end cap 102 increases continuously from the position of the passage 1021 toward the side of the first direction (X) closest to the photosensitive drum P, and the spacing L3 at the side closest to the photosensitive drum P is larger than the distance L4 between the first spacing protrusion 204 and the second spacing protrusion 205. When the user needs to move the developing cartridge 20 in the mounting direction of the developing cartridge 20 (the side close to the photosensitive drum P in the first direction (X)) after inserting the second limiting protrusion 205 into the passage 1021, the movement of the developing cartridge 20 in the first direction (X) can be limited, so that the occurrence of the condition that the developing roller D is too close to the photosensitive drum P can be prevented, and the deformation of the process cartridge can be prevented while the printing quality is ensured.

As shown in fig. 6, the end cap 102 is divided into a first end cap 1026 and a second end cap 1027, wherein the first end cap 1026 is provided with the channel 1021 described in the above embodiment, and the second end cap 1027 is connected to the rear support 103. The upper and lower end surfaces of the first end cap 1026 are substantially in a meandering inclined state, and the upper end surface of the second end cap 1027 is substantially in a horizontal state, as viewed in the projection in the second direction (Y).

As shown in fig. 13, in some embodiments, to further prevent the mounted developing cartridge 20 from being displaced under abnormal conditions, a displacement groove 1028 is provided in the first end cap 1026 on the end cap 102, the displacement groove 1028 is located at the junction of the end cap 102 and the first stopper projection 204, and the displacement groove 1028 is located closer to the photosensitive drum P with respect to the passage 1021. Specifically, the displacement groove 1028 is formed of approximately 3 faces, which are an arc face near the passage 1021, a plane substantially parallel to the horizontal plane, and an arc face near the photosensitive drum P, respectively, as viewed in the projection in the second direction (Y). In the process of installing the developing cartridge 20 on the photosensitive cartridge 10, the first limiting protrusion 204 on the developing cartridge 20 is tightly attached to the upper surface of the first end cap 1026 and gradually moves toward the photosensitive drum P in the second direction (Y), when moving to the displacement slot 1028, the second limiting protrusion 205 first slides onto a plane along the arc surface close to the channel 1021, and has a certain displacement distance on the plane, so that the installation of the developing cartridge 20 is completed, and the arc surface close to the photosensitive drum P can limit the user to excessively push the developing cartridge 20 onto the photosensitive cartridge 10, so as to prevent the deformation of the process cartridge. When the developing cartridge 20 needs to be detached from the photosensitive cartridge 10, the first limiting projection 204 needs to be close to and separated from the arc surface near the passage 1021, and the first limiting projection 204 can be limited to be easily separated from the end cover 102 in the abnormal condition of the second direction (Y) by the arc surface near the passage 1021, so that the developing cartridge 20 is prevented from being separated from the photosensitive cartridge 10 in the abnormal condition.

It should be noted that, the initial end distance L3 of the plane of the displacement slot 1028, which is substantially parallel to the horizontal plane, starts to increase toward the side of the first direction (X) near the photosensitive drum P and reaches the maximum value of the distance L3 at the end of the plane, which is substantially parallel to the horizontal plane, so as to further prevent the developing cartridge 20 from being too close to the photosensitive cartridge 10 after the mounting is completed, thereby preventing the process cartridge from being deformed.

As shown in fig. 1, the second limiting protrusion 205 forms an acute angle with respect to the horizontal plane of the first pressure F1 of the end cap 102 in the first direction (X). Specifically, the included angle formed by the first pressure F1 of the second limiting protrusion 205 acting on the first end cap 1026 is an acute angle, and in the static state after the installation of the photosensitive cartridge 10 on the developing cartridge 20, the second limiting protrusion 205 of the developing cartridge 20 can press the first end cap 1026, and the developing cartridge 20 can have a force in the installation direction close to the developing cartridge 20, so that the developing roller D on the developing cartridge 20 and the photosensitive drum P on the photosensitive cartridge 10 can be tightly attached, and the printing quality is ensured.

As shown in fig. 1 to 4, the horizontal distance L1 of the photosensitive drum P of the first spacing protrusion 204 in the first direction (X) is smaller than the horizontal distance L2 of the photosensitive drum P of the second spacing protrusion 205 in the first direction (X). Specifically, in the process of mounting or dismounting the developing cartridge 20, the first limiting protrusion 204 is required to be used as a fulcrum, and the developing cartridge 20 is rotated about the fulcrum, so that the second limiting protrusion 205 enters or leaves the channel 1021 on the end cover 102, and the process of mounting or dismounting the developing cartridge 20 is smoother.

As shown in fig. 1 to 4, it should be noted that a side of the first limiting protrusion 204 and the second limiting protrusion 205, which is close to the photosensitive drum P, is an arc surface or a straight surface. And is convenient for the developer cartridge 20 to rotate relative to the end cover 102 when being disassembled, and is convenient for the developer cartridge 20 to be taken out.

As shown in fig. 13, in some embodiments, in order to further prevent the developing cartridge 20 from being dismounted and rotating relative to the end cap 102 without jamming, so as to facilitate the removal of the developing cartridge 20, the first limiting projection 204 and the second limiting projection 205 are both provided in a cylindrical structure, and the first limiting projection 204 and the second limiting projection 205 are both circular when viewed from the second direction (Y), and no jamming of the developing cartridge 20 occurs no matter when the developing cartridge 20 is dismounted, the developing cartridge 20 is rotated with the first limiting projection 204 as a fulcrum, or the second limiting projection 205 enters or leaves the passage 1021.

As shown in fig. 5, 11 and 12, at least one first urging member 202 extending in the second direction (Y) is provided on the side of the powder hopper 201 away from the developing roller D, and the first urging member 202 is guided to be pressed against at least a portion of the photosensitive cartridge 10 when the developing cartridge 20 is mounted to the photosensitive cartridge 10. Specifically, the first pushing member 202 may be configured as a trapezoidal table structure, which has a first engagement surface 2021, a first abutment surface 2022, and a first vertical surface, where the end cover 102 is pivotally connected to the rear support 103, and at least one second pushing member 1033 extending in the second direction (Y) is disposed on the rear support 103, and when the developing cartridge 20 is mounted to the photosensitive cartridge 10, the second pushing member 1033 is guided to abut against at least a portion of the developing cartridge 20. Specifically, the second pushing member 1033 is a trapezoidal table structure, and has a second engagement surface 10332, a second abutment surface 10331, and a second vertical surface. When the developing cartridge 20 is mounted to the photosensitive cartridge 10, the second abutting surface 10331 of the second urging member 1033 on the photosensitive cartridge 10 abuts against the first vertical surface, the second abutting surface 10332 abuts against the first abutting surface 2021, and the second vertical surface abuts against the first abutting surface 2022, and the second urging member 1033 on the rear side bracket 103 urges the first urging member 202 of the developing cartridge 20, so that the developing cartridge 20 has an urging force in the photosensitive drum P direction of the photosensitive cartridge 10, so that the developing roller D can abut against the photosensitive drum P to ensure printing quality. The first urging member 202 and the second urging member 1033 may be not only trapezoidal table mechanisms, but also hemispherical structures, wavy structures, and the like, and are not limited thereto, as long as the second urging member 1033 has urging force against the first urging member 202.

As shown in fig. 1 to 5, the present utility model also provides a process cartridge detachably mountable to an image forming apparatus, the process cartridge including a developing cartridge 20 and a photosensitive cartridge 10, the photosensitive cartridge 10 including a waste toner hopper 101, an end cap 102 mounted to at least one end portion of the waste toner hopper 101, and a photosensitive drum P mounted to an inlet of the waste toner hopper 101, the end cap 102 being provided with a passage 1021, the developing cartridge 20 including a toner hopper 201 and a developing roller D mounted to an outlet of the toner hopper 201, characterized in that at least one end portion of the toner hopper 201 is provided with a first stopper projection 204 and a second stopper projection 205 for mounting the developing cartridge 20; when the developing cartridge 20 is mounted to the photosensitive cartridge 10, the second limiting projection 205 is guided to pass through the passage 1021 and to be pressed against the end cap 102 opposite to the first limiting projection 204. The photosensitive cartridge 10 forms an installation space for installing the developing cartridge 20 by the waste toner hopper 101, the two end caps 102 and the rear side bracket 103, and the installation space is capable of accommodating the developing cartridge 20 as a whole and is also provided with an adjustment space capable of moving the developing cartridge 20 a certain distance in a first direction (X) near one side of the photosensitive drum P before the installation is completed. The user has more adjustment space in the process of installing the developing box 20 to the photosensitive box 10, so that the developing box 20 can be slightly adjusted according to actual conditions, the developing box 20 can be more prone to be close to the photosensitive box 10, namely the developing roller D is close to the photosensitive drum P, the structure is prevented from being too fixed, when the matching deviation occurs, the condition that adjustment cannot be performed occurs, and the stability of printing quality is ensured.

As shown in fig. 6, in some embodiments, the rear support 103 is located between the end caps 102 and is pivotally connected to the end caps 102. Specifically, the second end cover 1027 is provided with a positioning protrusion 1023 extending towards the rear side bracket 103 and having a hole-shaped structure in the middle, and correspondingly, the end of the rear side bracket 103 is provided with a positioning column 1036 inserted into the middle of the positioning protrusion 1023, in the installation process of the rear side bracket 103, firstly, the positioning column 1036 on one end of the rear side bracket 103 is installed to the middle of the positioning protrusion 1023 of one second end cover 1027, then, the other positioning column 1036 on the other end of the rear side bracket 103 is installed with the other positioning protrusion 1023 of the other second end cover 1027, finally, the positioning pins 1022 are respectively installed to the end of each positioning column 1036, so as to realize the positioning installation of the rear side bracket 103, and since the positioning pins 1022 are directly sleeved at the end of the positioning column 1036, the rear side bracket 103 can rotate a certain angle with the axis of the positioning column 1036 as the axis, after the developing box 20 is installed to the photosensitive box 10, the rear side bracket 103 can rotate a certain angle, and the second pushing member 1033 on the rear side bracket 103 can be forced to push the developing box 20 against the first pushing member 202 to further press the photosensitive drum 202 tightly, so as to ensure the quality of printing.

As shown in fig. 6 and 8-10, in some embodiments, in order to ensure that the rotation amplitude of the rear support 103 is within a controllable range, the second pushing member 1033 of the rear support 103 caused by the excessive rotation amplitude has excessive downward pressure, so as to excessively press the first pushing member 202 on the developing cartridge 20, so that the side of the developing cartridge 20, which is close to the photosensitive drum P, is tilted up, and the developing roller D is separated from the photosensitive drum P, thereby affecting the printing quality. The rear bracket 103 is provided with a limit post 1035 extending along the axis of the rear bracket 103, the second end cover 1027 is provided with a limit part 1024 with a waist-shaped hole structure, and the limit post 1035 is limited to move in the limit part 1024. When the rear bracket 103 rotates around the axis of the positioning post 1036, the limit post 1035 located on the rear bracket 103 moves in the limit portion 1024 of the waist-shaped hole structure, and the limit portion 1024 of the waist-shaped hole structure is configured to limit the swing amplitude of the limit post 1035 along the swing direction of the limit post 1035 when the rear bracket 103 rotates. The second pushing member 1033 of the rear support 103 has excessive downward pressure due to the excessive rotation, so that the first pushing member 202 on the developing cartridge 20 is excessively pressed, and the developing cartridge 20 is lifted up at a side close to the photosensitive drum P, which further causes the separation of the developing roller D and the photosensitive drum P, and affects the printing quality.

As shown in fig. 1 to 10 and 13, in some embodiments, an extension 1037 is provided at an end of the rear bracket 103 extending toward the upper edge of the photosensitive drum P in the first direction (X), a support 1034 extending axially in the second direction (Y) is provided at an end of the extension 1037, and a groove 1025 having a semicircular arc structure is provided on the first end cap 1026. The supporting member 1034 rotates into the groove 1025 with the semicircular arc structure when the second pushing member 1033 of the rear bracket 103 pushes the first pushing member 202 of the developer cartridge 20, and the groove 1025 further limits the rotation angle of the supporting member 1034 according to the rear bracket 103, so as to prevent the overlarge rotation angle of the rear bracket 103.

In the present embodiment, the rear bracket 103, the extension 1037, and the support 1034 are integrally formed by injection molding, and in other embodiments, since the support 1034 is directly applied to the inside of the image forming apparatus, in direct contact with the components of the image forming apparatus, a urging force is given to the support 1034 by the components of the image forming apparatus, so that the generation of the rotational torque of the process cartridge is reduced in order to make the process cartridge more stable. Because the supporting member 1034 is stressed greatly, in the long term, the condition that scratches and even breakage easily occur in the past, so the supporting member 1034 can be respectively detachably connected with the extension portion 1037, the extension portion 1037 and the rear side support 103, and when the conditions that normal printing is potentially influenced due to excessive scratches of the supporting member 1034 occur through the detachable connection of the supporting member 1034 or the extension portion 1037, the supporting member 1034 can be replaced, so that the printing is more stable.

It should be noted that, as in the above embodiment, the end cap 102 is divided into a first end cap 1026 and a second end cap 1027, where the first end cap 1026 is provided with the channel 1021 described in the above embodiment, and the second end cap 1027 is connected to the rear bracket 103. The upper and lower end surfaces of the first end cap 1026 are substantially in a meandering inclined state, and the upper end surface of the second end cap 1027 is substantially in a horizontal state, as viewed in the projection in the second direction (Y).

Wherein, the width of the channel 1021 along the first direction (X) of the first end cap 1026 is greater than or equal to the length of the second limiting protrusion 205 along the first direction (X). Specifically, the width of the channel 1021 is greater than or equal to the diameter of the second limiting protrusion 205, so as to prevent the second limiting protrusion 205 from being unable to smoothly enter or leave the channel 1021, or from being jammed during the movement of the channel 1021, so as to ensure the printing quality.

In order to further ensure that the second limiting protrusion 205 smoothly enters the channel 1021, a chamfer is arranged at the edge of the opening of the channel 1021, and the chamfer can be a straight chamfer or an arc chamfer, and the effect of the chamfer is to ensure that the second limiting protrusion 205 smoothly enters the channel 1021 so as to ensure that the developing cartridge 20 can be quickly mounted on the photosensitive cartridge 10.

As shown in fig. 1, 5 to 7 and 10, in order to allow the grip 203 portion of the developing cartridge 20 to be received in the photosensitive cartridge 10 when the developing cartridge 20 is mounted in the photosensitive cartridge 10, or in order to make the developing cartridge 20 and the photosensitive cartridge 10 more compact in structure in combination as a process cartridge, the rear side bracket 103 is provided with symmetrically arranged catching grooves 1032 in the first direction (X), the catching grooves 1032 having the same structure as the edge portion of the grip 203 portion of the developing cartridge 20 and capable of receiving the edge portion of the grip 203 portion. Meanwhile, the middle part of the rear side bracket 103 also has a grippable part 1031 for carrying the middle part of the grip 203 part on the developing cartridge 20, so that when a user needs to take out the process cartridge, the grip 203 part of the developing cartridge 20 and the grippable part 1031 of the rear side bracket 103 can be simultaneously gripped to take out the whole process cartridge, and the occurrence of loosening or detachment of other cartridge bodies caused by pulling out only the developing cartridge 20 or the photosensitive cartridge 10 does not occur.

The present utility model also provides an image forming apparatus (not shown) in which the process cartridge according to the above embodiment is detachable.

According to the image forming device of the embodiment, the image generated by the image forming device is clearer by adopting the processing box, and the imaging quality is ensured.

It should be noted that, in the embodiments of the present utility model, specific mechanisms and technical effects of the process cartridge may refer to the description about the chip above, and are not described herein.

The following points need to be described:

(1) The drawings of the embodiments of the present utility model relate only to the structures to which the embodiments of the present utility model relate, and other structures may refer to the general designs.

(2) The embodiments of the utility model and the features of the embodiments can be combined with each other to give new embodiments without conflict.

The above description is only specific embodiments of the present utility model, but the scope of the present utility model should not be limited thereto, and the scope of the present utility model should be determined by the claims.

Claims (10)

1. A process cartridge comprising a photosensitive cartridge and a developing cartridge detachably mounted into the photosensitive cartridge, the photosensitive cartridge comprising a waste toner hopper, an end cap mounted to at least one end of the waste toner hopper, and a photosensitive drum mounted to an inlet of the waste toner hopper; the developing cartridge includes a hopper and a developing roller mounted to an outlet of the hopper; the end cover is characterized in that the end part of the end cover is connected with a rear side bracket, and the rear side bracket can rotationally press against the developing box when the developing box is mounted on the photosensitive box.

2. A process cartridge according to claim 1, wherein said side portion of said hopper remote from said developing roller is provided with at least one first urging member extending in a first direction, said rear side bracket is provided with at least one second urging member extending in the first direction, and said second urging member is guided to be pressed against said first urging member when said developing cartridge is mounted to said photosensitive drum.

3. The process cartridge according to claim 1, wherein an end portion of the rear side bracket is provided with an extension portion extending in a first direction, and a distal end of the extension portion is provided with a support member extending in a second direction;

the rear side bracket, the extension part and the support piece are integrally formed

Or the rear side bracket and the extension part, the extension part and the support part are respectively detachably connected.

4. The process cartridge of claim 1, wherein said end caps comprise a first end cap and a second end cap, said first end cap being coupled to said waste bin and said second end cap being pivotally coupled to said rear bracket.

5. The process cartridge according to claim 4, wherein the second end cap is provided with a positioning boss, and the rear side bracket is provided with a positioning post inserted into the positioning boss.

6. The process cartridge according to claim 4, wherein the rear side bracket is provided with a stopper post, and the second end cap is provided with a stopper portion that restricts movement of the stopper post.

7. A process cartridge according to claim 4, wherein an end of said rear side bracket is provided with a support member in the second direction, and said first end cap is provided with a recess for restricting movement of said support member.

8. A process cartridge according to any one of claims 1-7, wherein said rear side bracket is provided with at least one catching groove extending in the first direction.

9. A process cartridge according to any one of claims 1-7, wherein at least one end of said cartridge is provided with a first limit projection and a second limit projection for mounting said developing cartridge; when the developing cartridge is mounted to the photosensitive cartridge, the second limit protrusion is guided to pass through a part of the end cover and is in opposite pressing with the first limit protrusion on the end cover.

10. An image forming apparatus, wherein the process cartridge according to any one of claims 1 to 9 is detachable in the image forming apparatus.