Developing box

Abstract

A developing box is detachably installed in an image forming device comprising a drum assembly, the developing box comprises a box body, the two ends of the box body in the length direction are a driving end and a conductive end respectively, and the conductive end of the box body is provided with a conductive end cover; the developing roller is rotatably arranged on the box body; the chip is arranged at the conductive end of the box body, and the chip is provided with a chip contact which is used for being in contact with and electrically connected with an electric contact of the image forming device; and the positioning structure is arranged on the conductive end cover and is used for abutting against the image forming device or the drum assembly, so that the developing box is positioned. The processing box is prevented from shaking through the positioning structure, and the situation that the developing box cannot be normally used due to the fact that the developing box chip and the electrical contact of the imaging equipment are connected in a dislocation mode and the electrical connection is interrupted is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of imaging equipment, especially to a developing box. BACKGROUND

[0002] An image forming apparatus (also referred to as an image forming device) forms an image on a recording medium, and examples of the image forming apparatus include an electronic copying machine, an electrophotographic printer (e.g., a laser beam printer, an LED printer, etc.), a facsimile machine, a word processor, and the like. The image forming apparatus is provided with a developing box that develops an electrostatic latent image on a photosensitive drum using a developer. The developing box has a developing roller that is rotatably supported in a housing, and develops by supplying toner accommodated in the housing from the developing roller to the photosensitive drum.

[0003] As shown in Figs. Figure 1 and Figure 2 The image forming apparatus is further provided with a mounting detection device, wherein the mounting detection device includes a swing guide 81 / 80. The swing guide 81 is mounted in the image forming apparatus A1 through a connecting rod 81g, and can swing in the image forming apparatus A1 with the connecting rod 81g as the center. When the developing box 100 is mounted in the image forming apparatus, the developing box 100 cooperates with the swing guide 81 to drive the swing guide 81 to swing and cooperate with other structures of the image forming apparatus to complete the mounting detection of the developing box.

[0004] In the prior art, there is a developing box provided with a force receiving piece 70 / 72. When the developing box is mounted in the image forming apparatus A1, the image forming apparatus transmits a driving force to the developing box, and a forcing piece 151 of the image forming apparatus moves in the Nh8 direction and applies a forcing force to the force receiving piece on the developing box. The force receiving piece is pushed and slides in a sliding groove of an end cover of the developing box. When the force receiving piece slides, it touches the swing guide 81 in the image forming apparatus and drives the swing guide 81 to swing counterclockwise. A reset piece is arranged between the force receiving piece and the end cover. Therefore, when the forcing piece 151 moves in the NH7 direction and removes the force on the force receiving piece, the force receiving piece returns to the initial position in the NH7 direction under the action of the reset piece, thereby completing the mounting detection.

[0005] However, in the above mounting detection process, the movement of the force receiving piece causes the processing box to shake, resulting in the abnormal connection of the electrical contacts of the developing box chip rack and the image forming apparatus, the interruption of the electrical connection between the developing box chip and the electrical contacts of the image forming apparatus, and the failure of the developing box to be used normally. UTILITY MODEL CONTENTS

[0006] In order to solve at least one of the above technical problems, the utility model provides a developing box which is detachably mounted in an image forming device including a drum assembly, and the developing box includes:

[0007] The length direction of the box body is provided with a driving end and a conductive end respectively, and the conductive end is provided with a conductive end cover;

[0008] The developing roller is rotatably arranged on the box body;

[0009] The chip is arranged on the conductive end of the box body, and the chip has chip contacts for contacting and electrically connecting with electric contacts of the image forming device; and

[0010] The positioning structure is arranged on the conductive end cover and is used for abutting against the image forming device or the drum assembly, so that the developing cartridge is positioned.

[0011] The utility model discloses a positioning structure prevents the developing cartridge from shaking, prevents the chip of the developing cartridge from being connected with the electric contact of the imaging equipment in a wrong position, and interrupts the electric connection, thereby causing the developing cartridge to be unable to be normally used.

[0012] In some embodiments, the developing cartridge further comprises:

[0013] The electrode is arranged on the conductive end cover, and the electrode comprises electrode contacts for contacting and electrically connecting with the image forming device;

[0014] When observed on a projection plane perpendicular to the axis of the developing roller, the axis of the developing roller, the chip contacts and the connecting line of the electrode contacts of the two electrodes form an imaginary area, and at least a part of the positioning structure is arranged outside the imaginary area.

[0015] In some embodiments, the developing cartridge further comprises a powder outlet knife, and the electrode has two electrode contacts for electrically connecting with the powder outlet knife and the developing roller respectively;

[0016] When observed on a projection plane perpendicular to the axis of the developing roller, the axis of the developing roller, the chip contacts and the connecting line of the electrode contacts of the two electrodes form an imaginary area, and at least a part of the positioning structure is arranged outside the imaginary area.

[0017] In some embodiments, the positioning structure comprises a positioning column, and the positioning column is used for moving along a guide rail on the image forming device, thereby guiding the developing cartridge to be installed in place.

[0018] In some embodiments, the positioning structure further comprises an auxiliary positioning structure, and the auxiliary positioning structure is used for abutting against the image forming device, so that the chip contacts and the electric contacts are kept in contact.

[0019] In some embodiments, the auxiliary positioning structure is a deformable positioning elastic buckle, and the deformable positioning elastic buckle comprises a plate structure and a protrusion arranged on the plate structure;

[0020] The image forming device is provided with a rib, and the rib is provided with a avoiding surface and an abutting surface;

[0021] When the developing cartridge is installed, the protrusion abuts against the avoiding surface, so that the plate-shaped structure is elastically deformed. When the protrusion moves away from the avoiding surface, the plate-shaped structure elastically restores, so that the protrusion abuts against the abutting surface, thereby keeping the chip contact and the electric contact in contact.

[0022] In some embodiments, the auxiliary positioning structure is an abutting protrusion, which is arranged adjacent to the positioning column. When the developing cartridge is installed in place, the abutting protrusion abuts against the sidewall of the guide rail, so that the chip contact and the electric contact are kept in contact.

[0023] In some embodiments, the auxiliary positioning structure is an abutting protrusion.

[0024] The image forming apparatus comprises a door cover, which is provided with a rib.

[0025] When the developing cartridge is installed in place and the door cover is closed, the abutting protrusion abuts against the rib, so that the chip contact and the electric contact are kept in contact.

[0026] In some embodiments, the sidewall of the image forming apparatus is provided with a guide rail and a guide groove, the guide groove is used to guide the installation of the drum assembly, the accommodation space of the guide groove is larger than that of the guide rail, and the guide groove is closer to the drum assembly than the guide rail.

[0027] When the developing cartridge is installed, the positioning structure is used to move along the guide groove, thereby guiding the installation of the developing cartridge in place.

[0028] In some embodiments, the electrically conductive end cap is provided with an upwardly extending extension, and the positioning structure is arranged at the end of the extension and extends away from the cartridge body along the length direction of the cartridge body.

[0029] In some embodiments, when the developing cartridge is installed in place, the positioning structure abuts against the drum assembly, so that the developing cartridge is positioned.

[0030] In some embodiments, the electrically conductive end cap is provided with an upwardly extending extension, and the positioning structure is arranged at the end of the extension and extends towards the cartridge body along the length direction of the cartridge body, and then extends towards the drum assembly, thereby abutting against the drum frame of the drum assembly.

[0031] In some embodiments, the electrically conductive end cap is provided with an action fulcrum, which is used to abut against the image forming apparatus to guide the installation of the developing cartridge.

[0032] When viewed in a projection plane orthogonal to the axis of the developing roller, the axis of the developing roller, the chip contact, and the line connecting the action fulcrum form an imaginary region, and at least a part of the positioning structure is arranged outside the imaginary region.

[0033] In some embodiments, the conductive end cap is provided with a plate-shaped auxiliary positioning structure at one end of the developing cartridge away from the developing roller in the width direction of the developing cartridge, and the auxiliary positioning structure is provided with an action fulcrum at the end away from the developing roller in the width direction of the developing cartridge.

[0034] In some embodiments, when viewed on a projection plane perpendicular to the axis of the developing roller, a line L1 is formed between the axis of the developing roller and the action fulcrum, a line L2 is formed between the chip contact and the action fulcrum, and a line L3 is formed between the chip contact and the axis of the developing roller, and L3 < L2 < L1.

[0035] In some embodiments, the positioning structure is a positioning column, which is used to move along a guide rail on the image forming device to guide the installation of the developing cartridge.

[0036] In some embodiments, the developing cartridge further comprises a chip mounting portion, and the chip mounting portion is provided with a mounting groove for mounting the chip, and the mounting groove is provided with a recess at one side of the cartridge body away from the developing cartridge in the length direction of the developing cartridge.

[0037] In some embodiments, the developing cartridge further comprises a chip mounting portion, and the chip mounting portion is provided with a mounting groove for mounting the chip, and the mounting groove is provided with a shielding portion at one side of the cartridge body away from the developing cartridge in the length direction of the developing cartridge. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of the prior art image forming device;

[0039] Figure 2 It is a structural schematic diagram of the prior art image forming device;

[0040] Figure 3 It is a structural schematic diagram of the developing cartridge installed in the image forming device in the first embodiment of the present application;

[0041] Figure 4 It is a sectional view of the developing cartridge installed in the image forming device in the first embodiment of the present application;

[0042] Figure 5 It is a sectional view of the developing cartridge installed in the image forming device in the second embodiment of the present application;

[0043] Figure 6 It is a structural schematic diagram of the developing cartridge installed in the image forming device in the third embodiment of the present application;

[0044] Figure 7 It is a structural schematic diagram of the developing cartridge installed in the image forming device in the third embodiment of the present application; Figure 6 Part of the structure is enlarged;

[0045] Figure 8Structure schematic view of the developing box in the embodiment three of the utility model from another angle of installing to the image forming device;

[0046] Figure 9 Connecting schematic view of the developing box and drum assembly in the embodiment one of the utility model;

[0047] Figure 10 Structure schematic view of the developing box in the embodiment one of the utility model;

[0048] Figure 11 Structure schematic view of the developing box in the embodiment one of the utility model;

[0049] Figure 12 Structure schematic view of the drive assembly of the developing box in the embodiment one of the utility model;

[0050] Figure 13 Front view of the conductive end of the developing box in the embodiment one of the utility model;

[0051] Figure 14 Structure schematic view of the drive end end cover of the developing box in the embodiment one of the utility model;

[0052] Figure 15 Partial structure enlarged view of the drive end end cover of the developing box in the embodiment one of the utility model after hiding elastic piece;

[0053] Figure 16 Structure schematic view of the conductive end end cover of the developing box in the embodiment one of the utility model;

[0054] Figure 17 Front view of the conductive end of the developing box in the embodiment two of the utility model;

[0055] Figure 18 Front view of the conductive end of the developing box in the embodiment three of the utility model;

[0056] Figure 19 Perspective view of the developing box in the embodiment four of the utility model;

[0057] Figure 20 Sectional view of the developing box and drum assembly cooperation in the embodiment four of the utility model.

[0058] Figure 21 Side surface structure schematic view of the conductive side of the developing box in the embodiment four of the utility model;

[0059] Figure 22 Perspective view of the developing box in the embodiment four of the utility model installing in the image forming device;

[0060] Figure 23 Perspective view of the developing box in the embodiment five of the utility model;

[0061] Figure 24 It is the side surface structure schematic view of the conductive side of the developing box in the embodiment five of the utility model;

[0062] Figure 25 It is the perspective view of the developing box installed in the image forming device in the embodiment five of the utility model;

[0063] Figure 26 It is the perspective structure view of the developing box of the embodiment six of the utility model;

[0064] Figure 27 It is the perspective structure view of the developing box of the embodiment six of the utility model from another angle;

[0065] Figure 28 It is the perspective structure view of the developing box of the embodiment six of the utility model when observing the processing box along the developing roller axis direction;

[0066] Figure 29 It is the perspective structure view of the developing box of the embodiment six of the utility model from another angle;

[0067] Figure 30 It is the perspective structure view of the developing box of the embodiment six of the utility model from another angle; Figure 4 It is the partial enlarged view of A in the embodiment six of the utility model;

[0068] Figure 31 It is the perspective structure view of the developing box of the embodiment seven of the utility model when observing the processing box along the developing roller axis direction;

[0069] Figure 32 It is the perspective structure view of the developing box of the embodiment seven of the utility model from another angle;

[0070] Figure 33 It is the perspective structure view of the developing box of the embodiment seven of the utility model from another angle; Figure 7 It is the partial enlarged view of B in the embodiment seven of the utility model. DETAILED DESCRIPTION

[0071] The utility model will be further described in detail below in conjunction with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0072] It should be noted that the terms "first", "second" and the like are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0073] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "mounting" and "connecting" can be fixed connection, or can be movable connection, "fixing" can be non-detachable fixed connection, or can be detachable fixed connection, wherein "non-detachable fixed connection" can be two parts formed separately and then mounted, or can be two parts formed integrally; can be mechanical connection; can be direct connection, or can be indirect connection through intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0074] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0075] In the above description, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0076] Embodiment one

[0077] As Figures 3 to 8 shown, the present embodiment provides a developing box 100, which is detachably mounted in an image forming device (not shown), which can be an electronic copier, an electronic photocopier (such as a laser beam printer, an LED printer, etc.), a facsimile machine, a word processor, etc.

[0078] In the present specification, in order to better describe the corresponding structure, the length direction of the developing box 100 in the drawing is defined as the first direction, and the reference Figure 11A1, A2 directions shown in the figure, wherein the A1 direction corresponds to the driving end of the developing cartridge, and the A2 direction corresponds to the non-driving end of the developing cartridge, the width direction of the developing cartridge 100 is defined as the second direction, the B1, B2 directions in the figure are referred to, the height direction of the developing cartridge 100 is defined as the third direction (the height direction is substantially the up-down direction), the first direction, the second direction and the third direction are intersected with each other. The above directions are also applicable to the drum assembly 200.

[0079] The image forming apparatus has a main frame, the drum assembly 200 is installed in the main frame, the main frame has side plates 300 at both ends along the axis direction (A1 and A2 directions) of the photosensitive drum 220, the inner side of the side plates is provided with guide plates 310, the guide plates are provided with inclined guide rails 311, the guide rails 311 have side walls 311a (see Figure 5 ), the developing cartridge 100 can be installed into the main frame along the guide rails 311. At one end of the A1 direction of the main frame, the side plate 300 is further provided with a rib 320 to support the developing cartridge 100, wherein the rib 320 includes a avoiding surface 321 and an abutting surface 322 (see Figure 4 ). The image forming apparatus is further provided with a chip receiving frame 330 (see Figures 6-7 ) to interface with the chip mounting portion 121 of the developing cartridge 100, so that the electrical contacts on the chip receiving frame 330 are in contact with the chip on the chip mounting portion 121 and are electrically connected to identify the chip information of the developing cartridge 100. The image forming apparatus is further provided with a door cover 340 (see Figure 6 , Figure 8 ), when the developing cartridge 100 is installed into the image forming apparatus, the door cover 340 of the image forming apparatus is closed, and the image forming apparatus starts to perform the installation detection device. In some embodiments, the door cover 340 is further provided with a rib 341 protruding in the C2 direction.

[0080] As shown in Figure 9 , the drum assembly 200 includes a drum frame 210, a photosensitive drum 220, a charging roller (not shown) and a drum frame electrode (not shown), the photosensitive drum 220 and the charging roller are rotatably supported on the drum frame 210, and the drum frame electrode is electrically connected with the charging roller and the image forming apparatus to supply the voltage of the image forming apparatus to the charging roller, so that the charging roller can charge the photosensitive drum 220.

[0081] As shown in Figure 10 and Figure 11 , the developing cartridge 100 includes a cartridge body 1, a developing roller 2, a stirring frame (not shown), a powder outlet knife 3, a driving assembly 6, an electrode 5, a chip and a positioning structure 8.

[0082] As shown in Figure 10 and Figure 11As shown, the housing 1 includes a developing frame 11, a conductive end cap 12, and a driving end cap 13. One end of the developing frame 11 in a first direction (length direction) is the driving end (A1 direction end), and the other end is the conductive end (A2 direction end). The housing 1 has a toner cartridge for containing developer, which can be toner powder. The driving end cap 13 is located on the outer side of the driving end face of the developing frame 11, and the conductive end cap 12 is located on the outer side of the conductive end face of the developing frame 11.

[0083] like Figure 10 and Figure 11 As shown, the developing roller 2 is rotatably supported on the developing frame 11. Specifically, the axial direction of the developing roller 2 is aligned with the length direction (along the A1 and A2 directions) of the developing frame 11. The developing roller 2 includes a developing roller shaft and a rubber roller body. The two ends of the developing roller shaft are respectively supported on the end face of the driving end of the developing frame 11 and the conductive end cap 12. The developing roller shaft can be made of a conductive metal material. In the second direction (B1 and B2 directions), the developing roller 2 is positioned at the end of the cartridge 1 closest to the B1 direction. In the third direction (C1 and C2 directions), the developing roller 2 is positioned at the end of the cartridge 1 closest to the C1 direction.

[0084] The stirring rack is rotatably supported on the developing frame 11 and located inside the powder hopper. Specifically, the two ends of the stirring rack are supported on the end face of the driving end and the end face of the conductive end of the developing frame 11. The length direction of the stirring rack is consistent with the length direction of the developing frame 11. The stirring rack can rotate along its axis in the length direction. The stirring rack can have one or more blades. By rotating, the blades are driven to stir the developer in the powder hopper to prevent the developer in the powder hopper from clumping. At the same time, it can also transport the developer towards the developing roller 2 and be attracted by the charged developing roller 2.

[0085] like Figure 10 and Figure 11 As shown, the powder ejector blade 3 is mounted on the developing frame 11. A portion of the powder ejector blade 3 is in linear contact with the surface of the developing roller 2, used to control the thickness of the developer layer attached to the developing roller 2, so as to ensure that the developer delivered by the developing roller 2 is uniform. Specifically, the powder ejector blade 3 includes a blade holder and a blade. The blade is mounted on the blade holder and fixed to the developing frame 11 together with the blade holder. The blade holder can be made of a conductive metal material, and the blade can be made of a rubber material. A portion of the blade is in linear contact with the roller surface of the developing roller 2.

[0086] like Figure 12As shown, a driving assembly 6 is arranged on the side of the driving end of the developing frame 11 (the side of the A1 direction), specifically, between the developing frame 11 and the driving end end cover 13. The driving assembly 6 includes a power receiving member 61 and a gear set. The power receiving member 61 is used to receive the driving force of the image forming apparatus A1 and transmit the driving force through the gear set, and further drive the developing roller 2 and the stirring frame to rotate. The gear set includes a developing roller gear 62, an intermediate transmission gear 64 and a stirring frame gear 63. The developing roller gear 62 is fixed on one end of the developing roller shaft in the length direction, and the developing roller gear 62 is engaged with the power receiving member 61, so that the developing roller 2 can receive the driving force to rotate. The stirring frame gear 63 is fixed on one end of the stirring frame in the length direction, and the stirring frame gear 63 is engaged with the intermediate transmission gear 64, and the intermediate transmission gear 64 is engaged with the power receiving member 61, so that the stirring frame gear 63 at one end of the stirring frame can receive the driving force from the power receiving member 61 through the intermediate transmission gear 64 to rotate. In some other embodiments, the developing roller gear 62 and the stirring frame gear 63 can be directly or indirectly engaged with the power receiving member 61.

[0087] As shown, Figure 14 As shown, a force receiving member 7 is further arranged on the developing cartridge 100. In this embodiment, the force receiving member is arranged on the side of the driving end of the developing cartridge 100, and is used to cooperate with the image forming apparatus to complete the installation detection of the developing cartridge 100. The force receiving member 7 includes a force receiving part 71, a sliding part 72, a connecting part 73 and an abutting part 74. Specifically, the force receiving member 7 is arranged on the driving end end cover 13, and the force receiving part 71 can move under the action force of the driving end pushing member 151 of the image forming apparatus A1. A guide sliding groove 131a is arranged on the driving end end cover 13, and the sliding part 72 of the force receiving member 7 moves on the guide sliding groove 131a when the force receiving member 7 moves under the action force. A first elastic member 40 is further arranged between the driving end end cover 13 and the force receiving member 7. One end of the first elastic member 40 is connected to the connecting part 73 of the force receiving member 7, and the other end is connected to the driving end end cover 13, so as to reset the force receiving member 7 when the force receiving member 7 does not receive external force. Specifically, when the driving end pushing member moves in the Nh8 direction and drives the force receiving member 7 to slide in the Nh8 direction, the first elastic member 40 elastically deforms and stores force, and at the same time, the force receiving member 7 drives the driving end pushing member to swing, so as to cooperate with the installation detection device to detect. In this process, the developing cartridge does not move relative to the drum assembly, that is, the photosensitive drum and the developing roller do not appear in the interval state; after the detection signal is triggered, under the action force of the driving end pushing member in the NH7 direction and the elastic force release of the first elastic member 40, the force receiving member 7 resets to the uninstalled position in the NH7 direction.

[0088] The chip is arranged on the conductive end end cover 12, specifically at an end (B1 direction end) of the conductive end end cover 12 close to the axis of the developing roller 2 in the width direction (second direction), and the chip is closer to the B1 direction end than the developing roller 2 in the second direction. The chip stores information about the developing cartridge 100, and the chip is provided with chip contacts 4 configured to be electrically connected with the electrical contacts of the image forming apparatus chip receiving frame 330 to establish communication with the image forming apparatus, so that the image forming apparatus can acquire / identify the information about the developing cartridge 100. As shown in Figure 13 The conductive end end cover 12 is provided with a chip mounting portion 121 on the end close to the developing roller 2 in the width direction, for mounting the chip, and when the chip is mounted in the chip mounting portion 121, the chip contacts 4 are directed away from the conductive end end cover 12. When the developing cartridge 100 is installed in place, the chip mounting portion 121 is docked with the image forming apparatus chip receiving frame 330, so that the chip contacts with the electrical contacts of the image forming apparatus, and electrical connection is achieved.

[0089] As shown in Figure 13 and Figure 16 The conductive end of the developing cartridge 100 is also provided with an electrode 5, specifically, the electrode 5 is arranged on the inner side of the conductive end end cover 12, and the conductive end end cover 12 is provided with an opening, and the electrode contacts 9 of the electrode 5 can be exposed from the opening, i.e. the electrode contacts 9 are exposed to the outside of the conductive end end cover 12, so as to be electrically connected with the image forming apparatus, and the electrode 5 is also electrically connected with the other end of the developing roller 2 in the length direction, so as to charge the developing roller 2 and enable it to adsorb the developer, in this embodiment, the electrode 5 has two, and is electrically connected with the developing roller 2 and the powder outlet knife 3 respectively, and each electrode includes one electrode contact, i.e. the electrode contacts 9 are provided with two.

[0090] As shown in Figure 4 and Figure 13As shown, on the side of the conductive end of the developing cartridge 100, a positioning structure 8 is arranged, wherein the positioning structure 8 comprises a positioning column 81 and an auxiliary positioning structure, in this embodiment, the auxiliary positioning structure is specifically a deformable positioning elastic buckle 82. The positioning structure 8 is arranged on the conductive end end cover 12. Specifically, the positioning column 81 can be provided with one or more, in this embodiment, two positioning columns (positioning column 81a and positioning column 81b) are arranged adjacent to each other, for relatively positioning the developing cartridge 100 and the image forming apparatus, when the developing cartridge 100 is installed, the positioning column 81 is guided to install the developing cartridge 100 to the image forming apparatus by contacting and moving along the guide rail 311 of the image forming apparatus, and the developing cartridge 100 is positioned to ensure stable installation. The deformable positioning elastic buckle 82 can be integrally formed with the conductive end end cover 12, and optionally, the deformable positioning elastic buckle 82 and the conductive end end cover 12 can be made of POM material. Specifically, the deformable positioning elastic buckle 82 comprises a plate structure 821 and a protrusion 822. When the developing cartridge 100 is installed, the protrusion 822 of the deformable positioning elastic buckle 82 abuts against the avoiding surface 321 of the rib 320, so that the plate structure 821 elastically deforms to avoid the rib 320, when the developing cartridge 100 is installed in place, the protrusion 822 leaves the avoiding surface 321, the deformation of the plate structure 821 recovers, so that the protrusion 822 abuts against the abutting surface 322 of the end of the rib 320, the developing cartridge 100 is positioned, the electrical contact of the image forming apparatus chip receiving frame 330 is stably connected with the chip contact 4 of the chip mounting portion 121 of the developing cartridge 100, and the developing cartridge 100 is prevented from shaking when the force receiving member 7 moves, so as to cause the electrical contact and the chip contact 4 to be misaligned to cause the electrical connection to be interrupted.

[0091] As shown, Figure 13 In the width direction (second direction), the positioning column 81 is located at one end (B2 direction end) of the conductive end end cover 12 away from the developing roller 2, and the deformable positioning elastic buckle 82 is located at one end (B1 direction end) of the conductive end end cover 12 closer to the developing roller 2 than the positioning column 81; in the height direction (third direction), the positioning column 81 is located at one end (C1 direction end) of the conductive end end cover 12 closer to the developing roller 2, and the deformable positioning elastic buckle 82 is located at one end (C2 direction end) of the conductive end end cover 12 farther away from the developing roller 2 than the positioning column 81. When observed in the projection plane perpendicular to the axis of the developing roller (i.e., observed along the A1 direction), the axis H of the developing roller 2, the connecting line of the chip contact 4 and the electrode contact 9 form an imaginary area S1, the area with the largest area formed by the above-mentioned axis H of the developing roller 2, the chip contact 4 and the electrode contact 9 is taken as the imaginary area S1, and at least a part of the positioning structure 8 is arranged outside the imaginary area S1. Through the above arrangement, the distribution of the positioning structure 8 on the conductive end end cover 12 is more dispersed, the stress points are more dispersed, the stress of the developing cartridge 100 during installation is more balanced, and the stable installation of the developing cartridge 100 can be maximized.

[0092] Next, the installation process of the developing cartridge will be described in detail. When the developing cartridge 100 is installed into the image forming apparatus along the direction of the guide rail 311, the positioning post 81 guides the developing cartridge 100 to be installed into the image forming apparatus by sliding along the guide rail 311. When the protrusion 822 of the deformable positioning elastic buckle 82 abuts against the avoiding surface 321 of the image forming apparatus rib 320, the plate structure 821 deforms to the inside of the developing cartridge (i.e., in the A1 direction) to avoid the image forming apparatus rib 320. When the deformable positioning elastic buckle 82 moves beyond the rib 320 as the developing cartridge 100 continues to move, the plate structure 821 returns to the initial state. At this time, the developing cartridge 100 is installed in place, the image forming apparatus chip receiving holder 330 is engaged with the chip mounting portion 121 of the developing cartridge 100, and the protrusion 822 of the deformable positioning elastic buckle 82 abuts against the abutting surface 322 of the rib 320 to maintain the stable engagement of the image forming apparatus chip receiving holder 330 and the chip mounting portion 121 of the developing cartridge 100. When the developing cartridge 100 is installed in place, the driving end forcing member of the image forming apparatus moves in the NH8 direction to contact and push the stress receiving portion 71 of the stress receiving member 7. Under the action of the driving end forcing member, the sliding portion 72 moves along the guide sliding groove 131a on the driving end cover 13 to touch and swing the swinging guide member 81 in the image forming apparatus counterclockwise. Then, the driving end forcing member moves in the NH7 direction, and when the force on the stress receiving portion 71 is removed, the stress receiving member 7 returns to the initial position under the action of the first elastic member 40, thereby completing the installation detection. During the installation detection, the protrusion 822 abutting against the abutting surface 322 of the rib 320 stably electrically connects the developing cartridge 100 and the image forming apparatus, and the chip mounting portion 121 and the chip receiving holder 330 are always stably engaged. Therefore, the technical problem of dislocation of the connection between the chip contact 4 and the electric contact of the image forming apparatus and interruption of the electrical connection does not occur.

[0093] As Figures 14 to 16As shown, the developing cartridge 100 provided in this embodiment is also provided with a buffer elastic component to adjust the contact pressure between the developing roller 2 and the photosensitive drum. Specifically, a guide groove 131b and a buffer elastic component are provided on the drive end cap 13. The buffer elastic component includes a second elastic element 41 and a pushable block 42. The pushable block 42 can move within the guide groove 131b. One end of the second elastic element 41 is connected to the pushable block 42, and the other end is connected to the drive end cap 13. When the force-receiving member 7 is subjected to a force from the drive end pushing member along the NH7 direction, the abutment portion 74 of the force-receiving member 7 pushes the pushable block 42, and the second elastic element 41 is stretched. When the force from the drive end pushing member is removed, the pushable block 42 is reset under the action of the elastic element 41. A buffer elastic component can also be provided on the conductive end cap 12 of the non-drive end of the developing cartridge 100, including a force receiver 43 and a third elastic component 44. The force receiver 43 is sleeved on the conductive end cap 12, and one end of the third elastic component 44 is connected to the conductive end cap 12, and the other end is connected to the force receiver 43. When the force receiver 43 is subjected to a force along the NH7 direction from the non-drive end pusher of the image forming apparatus, the force receiver 43 swings, and the third elastic component 44 stretches. When the image forming apparatus removes the force, the force receiver 43 resets under the action of the third elastic component 44. The purpose of providing the buffer elastic component is to adjust the pressure of the developing roller on the photosensitive drum when the developing roller 2 contacts the photosensitive drum, thereby improving the developing quality.

[0094] Example 2

[0095] This embodiment provides a developing cartridge, which differs from Embodiment 1 above in that, as follows: Figure 5 and Figure 17 As shown, in this technical solution, the auxiliary positioning structure 8 is an abutment protrusion 83. Specifically, the abutment protrusion 83 is arranged adjacent to the two positioning posts 81a and 81b and extends in the B2 direction to abut against the side wall 311a of the guide rail 311, thereby replacing the deformable positioning spring buckle 82 and stabilizing the chip mounting part 121 and the image forming apparatus chip receiving frame 330 after the cassette packaging machine is in place. Optionally, the two positioning posts 81a and 81b and the abutment protrusion 83 can be integrally injection molded into a single positioning protrusion, as long as they serve the same positioning function.

[0096] When the developing cartridge 100 is mounted into the image forming apparatus along the direction of the guide rail 311, the positioning column 81 slides along the guide rail 311 to guide the developing cartridge 100 to be mounted into the image forming apparatus. When the developing cartridge 100 is mounted into place, the image forming apparatus chip receiving frame 330 is engaged with the chip mounting portion 121 of the developing cartridge 100, and the abutting protrusion 83 abuts against the side wall 311a of the guide rail 311 to keep the stable engagement of the image forming apparatus chip receiving frame 330 and the chip mounting portion 121 of the developing cartridge 100. When the mounting detection is performed after the developing cartridge 100 is mounted into place, the chip contact 4 is stably electrically connected with the image forming apparatus electric contact due to the abutting of the abutting protrusion 83 against the side wall 311a of the guide rail 311, and the chip mounting portion 121 is always stably engaged with the chip receiving frame 330. Therefore, the phenomenon that the chip mounting portion 121 is connected with the image forming apparatus out of position and the electrical connection between the chip contact 4 and the image forming apparatus electric contact is interrupted does not occur.

[0097] When viewed in the projection plane orthogonal to the axis of the developing roller (i.e. viewed along the Al direction), the axis H of the developing roller 2, the chip contact 4 and the electrode contact 9 form a virtual region S1. The largest area region formed by the axis H of the developing roller 2, the chip contact 4 and the electrode contact 9 is taken as the virtual region S1, and at least a part of the positioning structure 8 is arranged outside the virtual region S1. By the above arrangement, the positioning structure 8 can maximize the stable mounting of the developing cartridge 100.

[0098] The other structures of the developing cartridge 100 are similar to those of the first embodiment, and are not described here again.

[0099] Embodiment Three

[0100] The embodiment provides a developing cartridge, which is different from the second embodiment in the position of the abutting protrusion and the object to be abutted. As shown in Figure 8 and Figure 18 Specifically, the abutting protrusion 83 is arranged at one end of the conductive end cover 12 in the Cl direction and protrudes outside the conductive end cover 12 to abut against the rib 341 of the door cover 340, so as to enable the stable butt joint of the chip mounting portion 121 and the image forming apparatus chip receiving frame 330 after the process cartridge is mounted into place.

[0101] When the developing cartridge 100 is mounted into the image forming apparatus along the direction of the guide rail 311, the positioning posts 81a and 81b slide along the guide rail 311 to guide the developing cartridge 100 to be mounted into the image forming apparatus. When the developing cartridge 100 is mounted in place and the image forming apparatus chip receiving frame 330 is engaged with the chip mounting portion 121 of the developing cartridge 100, the door cover 340 is closed and the rib 341 abuts against the abutting protrusion 83 to keep the stable engagement between the image forming apparatus chip receiving frame 330 and the chip mounting portion 121 of the developing cartridge 100. When the mounting detection is performed after the developing cartridge 100 is mounted in place, the developing cartridge 100 is stably electrically connected with the image forming apparatus due to the abutment of the rib 341 against the abutting protrusion 83, and the chip mounting portion 121 is always stably engaged with the chip receiving frame. Therefore, the phenomenon that the connection between the chip mounting portion 121 and the image forming apparatus is out of place and the electrical connection between the chip contact 4 and the electrical contact of the image forming apparatus is interrupted does not occur.

[0102] When viewed on a projection plane orthogonal to the axis of the developing roller (i.e. viewed along the A1 direction), the axis H of the developing roller 2, the chip contact 4 and the electrical contact 9 form a virtual region S1. The maximum area region formed by the axis H of the developing roller 2, the chip contact 4 and the electrical contact 9 is taken as the virtual region S1, and at least a part of the positioning structure 8 is arranged outside the virtual region S1. By the above arrangement, the positioning structure 8 can maximize the stable mounting of the developing cartridge 100.

[0103] Embodiment Four

[0104] Referring to Figures 19-22 The difference between this embodiment and the first embodiment is mainly that this embodiment does not arrange the auxiliary positioning structure, and the positioning structure 8 of this embodiment moves along the guide slot 410 on the main frame instead of moving along the guide rail 311.

[0105] Referring to Figure 22 On the two side plates 300 of the main frame, the guide slots 410 are arranged, wherein the accommodation space of the guide slots 410 is larger than that of the guide rail 311, and in the width direction (the B1 and B2 directions) of the developing cartridge, the guide slots 410 are closer to the drum assembly 200 than the guide rail 311. The drum assembly 200 cooperates with the guide slots 410 during the installation process to guide or position, so that when the drum assembly 200 is placed on the main frame, it can move smoothly until it reaches the correct installation position. The installation sequence is to first install the drum assembly 200 on the main frame of the image forming apparatus through the guide slots 410, and then install the developing cartridge 100 into the image forming apparatus to combine with the drum assembly 200.

[0106] As shown in Figures 19 to 22 In this embodiment, the part of the developing cartridge 100 used for positioning is the positioning structure 8, which plays a guiding and positioning role when the developing cartridge 100 is mounted into the image forming apparatus. Referring toFigure 19 and 21 The positioning structure 8 is arranged on the conductive end of the developing cartridge 100, and is used to guide the stable installation of the developing cartridge 100 and to position the developing cartridge 100 to prevent it from rotating or moving during operation. The conductive end cover 12 has an extension portion 1141 extending in the C1 direction, and the positioning structure 8 is arranged at the end of the extension portion 1141 and extends in the direction away from the cartridge body (i.e. the A2 direction) along the length direction of the cartridge body. Specifically, the positioning structure 8 is a square-shaped protrusion.

[0107] During the installation of the developing cartridge 100 to the main frame, the positioning structure 8 moves on the guide groove 410 of the image forming apparatus to guide the installation of the developing cartridge 100. When the developing cartridge 100 is installed in place, the positioning structure 8 abuts against the guide groove 410, and when the developing cartridge 100 receives driving force to perform developing work, the positioning structure 8 can prevent the developing cartridge 100 from rotating or moving in the main frame, thereby positioning the developing cartridge 100. In the present embodiment, the positioning structure 8 is no longer positioned by the original guide rail 311. Since the space of the guide groove 410 is larger than that of the guide rail 311, the positioning structure 8 is less likely to jam when moving along the guide groove 410, thereby enabling smooth installation of the developing cartridge 100.

[0108] In some embodiments, referring to Figure 21 The positioning structure 8 is arranged on the conductive end cover 12, and is arranged away from components such as the chip contact 4 and the developing roller 2. Preferably, when viewed in the projection plane orthogonal to the axis of the developing roller (i.e. viewed in the A1 direction), an imaginary region S1 is formed by the chip contact 4, the two electrode contacts 9, and the axis H of the developing roller 2, and the positioning structure 8 is located outside the imaginary region S1.

[0109] In the present embodiment, the developing cartridge 100 can also be provided with the positioning structure 8 on both the conductive end and the driving end as needed. The shape of the positioning structure 8 is not limited to the above shape, and can be any shape that is compatible with the guide groove 410, such as a circular, triangular, pentagonal, or other protrusion structure.

[0110] Embodiment Five

[0111] As shown in Figures 23 to 25 The difference between the present embodiment and Embodiment Four is that, in the present embodiment, the positioning structure 8 no longer cooperates with the guide groove 410 in the main frame to position the developing cartridge 100, but cooperates with the drum assembly 200 installed in the main frame to position the developing cartridge 100. Moreover, the positioning structure 8 in the present embodiment no longer moves in the guide groove 410 or any other guide structure, and no longer plays a role in guiding installation, but only plays a role in abutting positioning after the developing cartridge 100 is installed in place.

[0112] As shown in Figure 23As shown, the positioning structure 8 is also arranged on the conductive end cover 12 of the developing cartridge 100 and outside the imaginary area S1. The positioning structure is arranged at the end of the extension portion 1141 and extends towards the drum assembly 200 along the length direction of the cartridge body 1 (i.e. the A1 direction), and then extends towards the drum assembly 200, thereby abutting against the drum frame 210 of the drum assembly 200 to form positioning, so as to prevent the developing cartridge 100 from rotating or moving in the main frame. As viewed along the axial direction of the developing roller, the positioning structure 8 and the extension portion 1141 jointly form a "7" shape.

[0113] The use mode of the developing cartridge 100 provided by the utility model when being installed on the image forming device is as follows:

[0114] As shown in Figure 25 , align the developing cartridge 100 with the main frame, and push the developing cartridge 100 to move into the main frame. During the movement, the developing cartridge 100 can be moved in any convenient direction without having to move in a specific direction, until the developing cartridge 100 is installed in place. During the installation of the developing cartridge, the positioning structure 8 does not interfere with the guide rail 311 and the guide groove 410. After the developing cartridge 100 is installed in place, the positioning structure 8 abuts against the drum frame 210, so that the developing cartridge 100 is limited and positioned in the image forming device, preventing the developing cartridge 100 from rotating counterclockwise or moving in other ways relative to the image forming device during operation, preventing poor contact between the electrode contact 9 and the image forming device, and ensuring the stability between the developing cartridge 100 and the image forming device.

[0115] It can be understood that, in the case where the developing cartridge 100 is not provided with a cover, the positioning structure 8 can also be directly arranged on the conductive end of the cartridge body 1 of the developing cartridge 100, as long as the positioning function can be achieved, which is not limited here.

[0116] Embodiment six

[0117] Referring to Figures 26-30 , the embodiment is generally similar to embodiment one, and the difference mainly lies in that the auxiliary positioning structure of the embodiment is plate-shaped and has an action fulcrum 321.

[0118] In the embodiment, the positioning structure 8a includes a positioning column 81 and an auxiliary positioning structure 32. The positioning column 81 is the same as that of embodiment one, and the developing cartridge 100 abuts against the guide rail 311 on the side plate 300 of the image forming device through the positioning column 81. The positioning column 81 slides under the guidance of the guide rail 311, so that the developing cartridge 100 reaches the installation position and is assembled with the drum assembly 200, thereby installing the developing cartridge 100 into the image forming device.

[0119] Specifically, the conductive end cover 12 is provided with a plurality of positioning posts 81 protruding outward (i.e., protruding in the A2 direction). The conductive end cover 12 is provided with an auxiliary positioning structure 32 protruding outward in the width direction of the developing cartridge 100 away from the end of the developing roller 2 (i.e., in the B2 direction), and the auxiliary positioning structure 32 is provided with an action fulcrum 321 away from the end of the developing roller 2 in the width direction of the developing cartridge 100 (i.e., the end in the B2 direction). When viewed on a projection plane orthogonal to the axis of the developing roller 2 (i.e., viewed along the A1 direction), the axis center H of the developing roller 2, the chip contact 4, and the action fulcrum 321 form a pair of lines, which constitute an imaginary region U1.

[0120] As shown in Figure 28 , a straight line formed by connecting the axis center H of the developing roller 2 and the action fulcrum 321 is denoted as L1; a straight line formed by connecting the chip contact 4 and the action fulcrum 321 is denoted as L2; and a straight line formed by connecting the chip contact 4 and the axis center H of the developing roller 2 is denoted as L3. In this embodiment, L1, L2, and L3 are all virtual imaginary lines.

[0121] The imaginary region U1 is composed of the three lines L1, L2, and L3. When viewed on a projection plane orthogonal to the axis of the developing roller (i.e., viewed along the A1 direction), the three lines L1, L2, and L3 satisfy L3 < L2 < L1, i.e., the length of L3 is less than the length of L2, and the length of L2 is less than the length of L1.

[0122] As shown in Figure 28 and Figure 30 , the chip mounting portion 121 includes a mounting groove 1211, and the chip is detachably mounted in the mounting groove 1211. When the developing cartridge 100 is placed on a horizontal placement surface f, the surface of the chip is inclined relative to the horizontal placement surface f, and the mounting groove 1211 is provided with a recess 312 on the side of the cartridge body 1 away from the side in the length direction of the developing cartridge 100 (i.e., on the side in the A2 direction), which facilitates the removal of the chip from the chip mounting portion 3 by the worker.

[0123] As shown in Figures 28-29 , the plurality of positioning posts 81 on the conductive end cover 12 are generally circular posts. The positioning posts 81 are used to abut the guide rails 311 in the image forming apparatus and are guided by the guide rails 311 to reach the installed position of the cartridge body 1. Specifically, at least one positioning post 81 is not arranged in the imaginary region U1, and in this embodiment, the cartridge body 1 is provided with two positioning posts 81 on the conductive end 11, one of which is located in the imaginary region U1, and the other is located outside the imaginary region U1.

[0124] As shown in Figure 28As shown, in this embodiment, preferably, the auxiliary positioning structure 32 is a plate-shaped structure, and the action fulcrum 321 is located on the abutment edge of the auxiliary positioning structure 32 extending towards the conductive end cap 12 in the negative direction (i.e., the B2 direction) of the second direction, and the action fulcrum 321 is farther away from the developing roller 2 in the second direction than the positioning post 81. The auxiliary positioning structure 32 is used to cooperate with the image forming apparatus for installation, avoiding instability during the installation of the developing cartridge 100. The action fulcrum 321 abuts against the structure on the main frame of the image forming apparatus, assisting in the smooth installation of the developing cartridge 100. Specifically, during the installation of the developing cartridge 100, the action fulcrum 321 moves along the abutment structure 312 on the side plate 300 of the image forming apparatus (see... Figure 22 The movement guides the installation of the developing cartridge 100. It should be noted that any support point on the cartridge 1, depending on the model, can be considered a functional support point. Therefore, the specific location of the functional support point 321 in this application is not limited to the aforementioned location.

[0125] In the prior art, since the developing cartridge 100 is guided by the positioning post 81 on the developing cartridge 100 during installation, uneven force on the developing cartridge 100 during installation can easily cause the developing cartridge 100 to tilt or even rotate significantly. This results in one end of the developing cartridge 100 being installed in the initial position, while the other end cannot be installed, creating an installation dead point. The developing cartridge 100 becomes stuck and difficult to install, requiring it to be removed and reinstalled. However, in this embodiment, the fulcrum 321 can effectively assist the positioning post 81, thus assisting in the installation of the developing cartridge 100. The machine's function is that, due to the presence of two force-bearing points, the positioning post 81 and the fulcrum 321, the developing cartridge 100 is more stable during installation. Furthermore, since at least a portion of the positioning structure 8 (specifically at least one positioning post 81) is located outside the imaginary area U1, the distribution of at least one positioning post 81 and the fulcrum 321 on the conductive end cap 12 is more dispersed, making the force-bearing points more dispersed. This results in a more balanced force on the developing cartridge 100 during installation, maximizing the stability of the developing cartridge 100 during installation.

[0126] Example 7

[0127] The difference from Example 6 is that, as Figures 31-33 As shown, the chip mounting part 121 includes a mounting groove 1211. The mounting groove 1211 has a shielding part 313 on the side away from the cartridge body 1 in the length direction of the developing cartridge 100 (i.e., the side facing the A2 direction). (That is, unlike the chip mounting part 3 in Embodiment 6, this embodiment does not have a groove 312) to prevent the chip from being damaged by the structure on the image forming apparatus when the machine is stuck due to improper installation by the user.

[0128] All other structures in this embodiment are the same as those in Embodiment Six, therefore, they will not be described in detail again.

[0129] The above merely describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept, some modifications and improvements or free combinations of the above technical solutions can be made, including free combinations of technical features among different embodiments, which all belong to the protection scope of the present application.

Claims

1. A developing cartridge detachably mounted in an image forming apparatus including a drum assembly, characterized by, The developing cartridge comprises: a cartridge body, two ends of the cartridge body in the length direction are a driving end and a conductive end respectively, a conductive end cover is arranged on the conductive end of the cartridge body; a developing roller rotatably arranged on the cartridge body; a chip arranged on the conductive end of the cartridge body, the chip having chip contacts for contacting and electrically connecting with electrical contacts of the image forming apparatus; and a positioning structure arranged on the conductive end cover for abutting against the image forming apparatus or the drum assembly so that the developing cartridge is positioned.

2. The process cartridge according to claim 1, wherein, The developing cartridge further comprises: an electrode arranged on the conductive end cover, the electrode comprising electrode contacts for contacting and electrically connecting with the image forming apparatus; when viewed on a projection plane perpendicular to an axis of the developing roller, a line connecting an axis center of the developing roller, the chip contacts and the electrode contacts forms an imaginary area, and at least a part of the positioning structure is arranged outside the imaginary area.

3. The process cartridge of claim 2 wherein, The developing cartridge further comprises a powder outlet blade, and the electrode has two electrode contacts for electrically connecting with the powder outlet blade and the developing roller respectively; when viewed on a projection plane perpendicular to an axis of the developing roller, a line connecting an axis center of the developing roller, the chip contacts and the electrode contacts of the two electrodes forms an imaginary area, and at least a part of the positioning structure is arranged outside the imaginary area.

4. The process cartridge according to any one of claims 1 to 3, wherein, The positioning structure comprises a positioning column for moving along a guide rail on the image forming apparatus so as to guide the developing cartridge to be installed in place.

5. The process cartridge of claim 4 wherein, The positioning structure further comprises an auxiliary positioning structure for abutting against the image forming apparatus so that the chip contacts keep contacting with the electrical contacts.

6. The process cartridge of claim 5 wherein, The auxiliary positioning structure is a deformable positioning spring, which comprises a plate structure and a protrusion arranged on the plate structure; The image forming apparatus is provided with a rib, and the rib is provided with an avoiding surface and an abutting surface; When the developing cartridge is installed, the protrusion abuts against the avoiding surface, so that the plate structure is elastically deformed, and when the protrusion moves away from the avoiding surface, the plate structure elastically recovers, so that the protrusion abuts against the abutting surface, thereby making the chip contacts keep contacting with the electrical contacts.

7. The process cartridge of claim 5 wherein, The auxiliary positioning structure is an abutting protrusion, which is arranged adjacent to the positioning column; after the developing cartridge is installed in place, the abutting protrusion abuts against a side wall of the guide rail, so that the chip contacts keep contacting with the electrical contacts.

8. The process cartridge of claim 5 wherein, The auxiliary positioning structure is an abutting protrusion; The image forming apparatus comprises a door cover, and the door cover is provided with a rib; When the developing cartridge is installed in place and the door cover is closed, the abutting protrusion abuts against the rib, so that the chip contacts keep contacting with the electrical contacts.

9. The developer cartridge of any one of claims 1 to 3, wherein, A guide rail and a guide groove are arranged on a side wall of the image forming apparatus, the guide groove is used for guiding the installation of the drum assembly, a containing space of the guide groove is larger relative to a containing space of the guide rail, and the guide groove is closer to the drum assembly relative to the guide rail; When the developing cartridge is installed, the positioning structure is used for moving along the guide groove so as to guide the developing cartridge to be installed in place.

10. The process cartridge of claim 9 wherein, The conductive end cover is provided with an extension part extending upwardly, and the positioning structure is arranged at the end of the extension part and extends away from the cartridge body along the length direction of the cartridge body.

11. The developer cartridge of any one of claims 1 to 3, wherein, The positioning structure abuts against the drum assembly when the developing cartridge is installed in place, so that the developing cartridge is positioned.

12. The process cartridge of claim 11, wherein, The conductive end cover is provided with an extension part extending upwardly, and the positioning structure is arranged at the end of the extension part and extends away from the cartridge body along the length direction of the cartridge body.

13. The process cartridge of claim 1, wherein, The conductive end cover is provided with an action fulcrum for abutting against the image forming apparatus to guide the installation of the developing cartridge. When viewed in a projection plane orthogonal to the axis of the developing roller, the connecting line between the axis of the developing roller, the chip contact and the action fulcrum forms an imaginary area, and at least a part of the positioning structure is arranged outside the imaginary area.

14. The process cartridge of claim 13 wherein, The conductive end cover is provided with a plate-shaped auxiliary positioning structure at the end away from the developing roller in the width direction of the developing cartridge, and the action fulcrum is arranged at the end of the auxiliary positioning structure away from the developing roller in the width direction of the developing cartridge.

15. The process cartridge of claim 13, wherein, When viewed in a projection plane orthogonal to the axis of the developing roller, the connecting line between the axis of the developing roller and the action fulcrum forms L1, the connecting line between the chip contact and the action fulcrum forms L2, and the connecting line between the chip contact and the axis of the developing roller forms L3, L3 < L2 < L1.

16. The process cartridge of claim 13 wherein, The positioning structure is a positioning column for moving along a guide rail on the image forming apparatus to guide the installation of the developing cartridge in place.

17. The process cartridge of claim 13, wherein, The developing cartridge further comprises a chip mounting part provided with a mounting groove for mounting the chip, and the mounting groove is provided with a recess at the side away from the cartridge body in the length direction of the developing cartridge.

18. The process cartridge of claim 13 wherein, The developing cartridge further comprises a chip mounting part provided with a mounting groove for mounting the chip, and the mounting groove is provided with a shielding part at the side away from the cartridge body in the length direction of the developing cartridge.

Images