Developing box

Abstract

A box body is provided with a first end and a second end which are oppositely arranged in a first direction, is provided with a third end and a fourth end which are oppositely arranged in a second direction, and is provided with a fifth end and a sixth end which are oppositely arranged in a third direction; a developing roller located at the third end, rotating around a developing axis extending in the first direction, and rotating coaxially with the developing gear; the driving part is located at the first end, receives power, rotates around a driving axis extending in the first direction and comprises a driving gear rotating coaxially; the storage medium comprises an electric contact surface located at the first end, and the electric contact surface faces upwards in the third direction; in the second direction, a distance between the fourth end and the drive axis is not greater than a distance between the electrical contact surface and the drive axis. According to the scheme, the developing box is more compact, miniaturization of the developing box is facilitated, and the manufacturing cost of the developing box is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic imaging technical field especially relates to a developing box. BACKGROUND

[0002] The developing box is a kind of widely used detachable part on image forming device, and the developing box is installed to drum assembly and is jointly installed to image forming device with drum assembly.The box body part of developing box in prior art is generally made larger, and the rear end of box body part is more away from the front end of box body than the chip (storage medium) on developing box in terms of size, which is not conducive to cost control of developing box and miniaturization of developing box. SUMMARY

[0003] According to an aspect of the utility model, provide a kind of developing box, comprising:

[0004] Box body, for storing developer, the box body has oppositely arranged first end and second end in first direction, oppositely arranged third end and fourth end in second direction, oppositely arranged fifth end and sixth end in third direction, the first direction, second direction and third direction cross each other;

[0005] Developing roller, located at the third end, rotates around the developing axis extending in the first direction, and rotates coaxially with developing gear;

[0006] Driving part, located at the first end, receives power and rotates around the driving axis extending in the first direction, and includes coaxially rotating driving gear;

[0007] Storage medium, including electrical contact surface located at the first end, the direction of the electrical contact surface is towards upper in third direction;

[0008] In second direction, the distance between the fourth end and the driving axis is not greater than the distance between the electrical contact surface and the driving axis.

[0009] In some embodiments, as viewed in the first direction, the electrical contact surface is located behind the fourth end.

[0010] In some embodiments, the electrical contact surface is flush with the fourth end at the front end in second direction;Or, the electrical contact surface is flush with the fourth end at the rear end in second direction.

[0011] In some embodiments, in second direction, the distance from the developing axis to the fourth end is 56-70mm.

[0012] In some embodiments, in second direction, the distance from the farthest point of the developing roller away from the fourth end to the fourth end is 60-75mm.

[0013] In some embodiments, the distance between the driving axis of the driving part and the fourth end in the second direction is 44-52mm.

[0014] In some embodiments, there are at least two gears between the driving gear and the developing gear, and the distance between the driving axis and the fourth end is 22-28mm.

[0015] In some embodiments, the distance between the developing axis and the fourth end is 45-52mm.

[0016] In some embodiments, the second end is provided with an electrode and a pushing part, the electrode is used to receive external voltage and transmit to the developing roller, the electrode is at least partially supported by the pushing part, the end of the pushing part away from the third end is provided with a matching part, the electrode comprises a first electric contact part, and the first electric contact part is engaged with the matching part.

[0017] In the second direction, the first electric contact part is at least partially farther away from the developing axis than the pushing part.

[0018] In some embodiments, the first end further comprises a support, and in the third direction, the support is below the electric contact surface, and the support supports the electric contact surface.

[0019] The utility model discloses the beneficial effects: the scheme is through setting up the volume of box body smaller and the distance between each component is reasonably set, makes electric contact surface in the second direction behind the fourth end or with the fourth end overlap, makes the developing box more compact, is favorable to the miniaturization of developing box, has reduced the manufacturing cost of developing box. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the first perspective solid drawing of drum assembly in example one.

[0021] Figure 2 It is the second perspective solid drawing of drum assembly in example one.

[0022] Figure 3 It is the solid drawing of developing box in example one.

[0023] Figure 4 It is the first end solid drawing of developing box in example one.

[0024] Figure 5 It is the second end solid drawing of developing box in example one.

[0025] Figure 6 It is the first end explosion schematic drawing of developing box in example one.

[0026] Figure 7 is a front view of the developer cartridge drive assembly in Example One;

[0027] Figure 8 is a front view of the first end of the developer cartridge in Example One;

[0028] Figure 9 is an exploded view of the first end of the developer cartridge in a variation of Example One;

[0029] Figure 10 is a perspective view of the developer cartridge drive assembly in a variation of Example One;

[0030] Figure 11 is a partial cross-sectional view of the developer cartridge mounted to the drum assembly in a variation of Example One;

[0031] Figure 12 is a perspective view of the first end of the developer cartridge and drum assembly in Example One;

[0032] Figure 13 is a partial perspective view of the developer cartridge and drum assembly with the drum roller removed in Example One;

[0033] Figure 14 is a partial perspective view of the developer cartridge in Example Two;

[0034] Figure 15 is an exploded view of the developer cartridge in Example Two;

[0035] Figure 16 is an exploded view of the developer cartridge in Example Three;

[0036] Figure 17 is a view of the developer cartridge mounted to the drum assembly in Example Four;

[0037] Figure 18 is a view of the drum assembly in Example Four;

[0038] Figure 19 is a view of the developer cartridge in Example Four;

[0039] Figure 20 is a partial exploded view of the developer cartridge in Example Four;

[0040] Figure 21 is a view of the bottom of the developer cartridge mounted to the drum assembly in Example Four;

[0041] Figure 22 is a view of the second end of the developer cartridge in Example Four;

[0042] Figure 23 is a side view projection of the first end of the developer cartridge in Example Five;

[0043] Figure 24 is a structural diagram of a second bracket in the developing cartridge in Embodiment 5;

[0044] Figure 25 is a structural diagram of a bottom view of the developing cartridge installed to the drum assembly in Embodiment 5;

[0045] Figure 26 is a partial structural diagram of a first end of the developing cartridge in Embodiment 6;

[0046] Figure 27 is a partial structural diagram of a second end of the developing cartridge in Embodiment 6;

[0047] Figure 28 is a structural diagram of a top view of the developing cartridge in Embodiment 7;

[0048] Figure 29 is a structural diagram of a perspective view of the developing cartridge in Embodiment 7;

[0049] Figure 30 is a structural diagram of a side view of the developing cartridge in Embodiment 7 with a cover removed;

[0050] Figure 31 is a structural diagram of a side view of the developing cartridge in Embodiment 7;

[0051] Figure 32 is a partial structural diagram of the developing cartridge in Embodiment 7;

[0052] Figure 33 is a cross-sectional diagram of the developing cartridge in Embodiment 7;

[0053] Figure 34 is an exploded diagram of a cartridge body of the developing cartridge in Embodiment 8;

[0054] Figure 35 is a structural diagram of a second end of the developing cartridge in Embodiment 8;

[0055] Figure 36 is an exploded diagram of the second end of the developing cartridge in Embodiment 8;

[0056] Figure 37 is a positional diagram between a drive portion, an electrode, a second reinforcing portion, and a powder outlet blade in Embodiment 8;

[0057] Figure 38 is a cross-sectional diagram of the developing cartridge installed to the drum assembly in Embodiment 8. DETAILED DESCRIPTION

[0058] The utility model will make further detailed description in combination with the drawings, obviously, the described embodiment is a part of the utility model embodiment, 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.

[0059] It needs to be explained that the terms "first", "second" and the like are only 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 "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0060] In the utility model, unless otherwise specifically specified and limited, the terms "installation", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0061] In the utility model, unless otherwise specifically specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be indirectly contacted through an intermediate medium. Moreover, the first feature "above", "above" and "above" of 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" of 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.

[0062] In the above description, the description of the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model. In the description, the illustrative description of the above terms is not necessarily for 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, the person skilled in the art can combine and combine the different embodiments or examples described in the description and the features of the different embodiments or examples without contradiction.

[0063] For the convenience of description, in the present specification, the left-right direction indicated in the drawings is a first direction, the front-rear direction indicated in the drawings is a second direction, and the up-down direction indicated in the drawings is a third direction.

[0064] Embodiment One

[0065] As Figures 1-13 shown, the present embodiment provides a developing cartridge 1, which is detachably installed on a drum assembly 2 of an image forming apparatus, the image forming apparatus is provided with a separation output, the drum assembly 2 is used for carrying the developing cartridge 1, the drum assembly 2 includes a first side wall 21, a second side wall 22 and a photosensitive drum 23, the photosensitive drum 23 is rotatably supported by the first side wall 21 and the second side wall 22, and the photosensitive drum 23 receives a developer provided by the developing cartridge 1 to develop an electrostatic latent image on its surface. A first guide rail 211 is arranged at the first side wall 21, and a second guide rail 221 is arranged at the second side wall 22, both the first guide rail 211 and the second guide rail 221 are arc-shaped openings, which are used for guiding the developing cartridge 1 to be smoothly installed on the drum assembly 2, and an abutting portion 2211 is arranged at an end of the second guide rail 221. The drum assembly 2 further includes a force applying assembly, which is used for applying a pushing force to the developing cartridge 1, so that the photosensitive drum 23 can more stably receive the developer, the force applying assembly includes a first force applying member 212 arranged close to the first side wall 21 and a second force applying member 222 arranged close to the second side wall 22, both the first force applying member 212 and the second force applying member 222 are connected to the drum assembly 2 through elastic members and can move relative to the photosensitive drum 23, and when the developing cartridge 1 is installed on the drum assembly 2, the first force applying member 212 and the second force applying member 222 can apply a pushing force to the developing cartridge 1 along the second direction towards the photosensitive drum 23. The drum assembly 2 is further provided with a separation rod 24 close to the first side wall 21, the separation rod 24 can move relative to the drum assembly 2, the separation rod 24 can receive a force applied by the separation force output on the image forming apparatus, and then generate a displacement relative to the drum assembly 2 while applying a separation force to the developing cartridge 1 to force a developing roller 131 on the developing cartridge 1 to separate from the photosensitive drum 23, so that the drum roller is separated.

[0066] The developing cartridge 1 includes a cartridge body 10, a developing assembly, a transmission assembly, a separation member and an identification assembly.

[0067] As Figure 3 and Figure 4As shown, the cartridge 10 has a containing cavity for containing the developer, the cartridge 10 has a first end 11 (right end) and a second end 12 (left end) oppositely arranged in a first direction; the cartridge 10 has a third end 13 (front end) and a fourth end 14 (rear end) oppositely arranged in a second direction; the cartridge 10 has a fifth end 15 (upper end) and a sixth end 16 (lower end) oppositely arranged in a third direction. The cartridge 10 is provided with a friction portion 151 on the fifth end 15, the friction portion 151 is provided with a plurality of rib strips extending in the first direction, the friction portion 151 is used to facilitate the user to pick up the developing cartridge 1. The transmission assembly is located at the first end 11, used to receive the power output by the image forming device, so that the developing assembly in the developing cartridge 1 is driven. The first cover 111 is detachably fixedly installed on the first end 11 by screwing, the first cover 111 covers at least part of the transmission assembly, and the first cover 111 is used to protect the transmission assembly.

[0068] The identification assembly is located at the first end 11, and the identification assembly in the application is specifically a storage medium 113, the storage medium 113 is used to store the information of the developing cartridge 1, and the information is transmitted to the image forming device in the state that the developing cartridge 1 is installed in the image forming device, so that the developing cartridge 1 is recognized by the image forming device. The storage medium 113 includes an electrical contact surface 1131 which is integrally formed or combined separately, and the electrical contact surface 1131 can be electrically connected with the image forming device. The orientation of the electrical contact surface 1131 extends in the third direction, specifically, the orientation of the electrical contact surface 1131 extends upward in the third direction, and the electrical contact surface 1131 contacts the electrical contact pin of the image forming device in the third direction.

[0069] As shown in the drawings, Figure 4 and Figure 6As shown, the first end 11 is fixedly provided with a support 114, which is first clamped on the first cover 111 by buckling, and then further fixed on the first cover 111 by a screw, so as to indirectly fix and install the support 114 on the box body 10. The support 114 is provided with a clamping jaw 1143, and the first cover 111 is provided with a clamping hole 1112 capable of cooperating with the clamping jaw 1143. The support 114 can be clamped / detached on the first cover 111 in the first direction. In other embodiments, the clamping jaw 1143 can be arranged on the first cover 111, and the clamping hole 1112 can be arranged on the support 114. The support 114 is provided with a rib plate 1141 on the lower side in the up-down direction (third direction). The rib plate 1141 extends downward by a certain distance beyond the bottom wall of the support 114 in the third direction (i.e., protrudes from the bottom wall of the support 114). The rib plate 1141 can be separately arranged from the support 114, or integrally arranged with the support 114. In this application, preferably, the rib plate 1141 is integrally formed with the support 114. One or more rib strips 1142 are arranged between the rib plate 1141 and the support 114 to reinforce the rib plate 1141.

[0070] In other embodiments, the support 114 can be directly fixed on the box body 10 or the first cover 111 by welding, gluing or the like. The storage medium 113 is fixedly installed on the support 114. Specifically, the support 114 is provided with a mounting recess recessed from top to bottom. The storage medium 113 is fixedly installed in the mounting recess by gluing, clamping or the like. Alternatively, for the separately arranged storage medium 113, only the electrical contact surface 1131 can be fixedly installed on the support 114. In the third direction, the support 114 is located below the electrical contact surface 1131 to support the electrical contact surface 1131.

[0071] As shown, Figure 8 In this embodiment, the storage medium 113 is located at the rear side of the fourth end 14 in the second direction. Specifically, the electrical contact surface 1131 is provided with a first horizontal line L1, which is a horizontal line perpendicular to the second direction and formed by connecting the points where the electrical contact surface 1131 is electrically connected to the image forming apparatus. In the second direction, the first horizontal line L1 is located at the rear side of the fourth end 14.

[0072] As shown, Figure 7As shown, the fourth end 14 has a second horizontal line L2 perpendicular to the second direction at its farthest point from the third end 13. In this embodiment, the first horizontal line L1 is parallel to or coincides with the second horizontal line L2. When the first horizontal line L1 is parallel to the second horizontal line L2, the first horizontal line L1 is further back than the second horizontal line L2, meaning the first horizontal line L1 is farther from the third end 13. When the first horizontal line L1 coincides with the second horizontal line L2, the plane where the electrical contact surface contacts the electrical contact pin on the image forming apparatus is coplanar with the plane where the fourth end 14 is furthest from the third end 13. In this embodiment, the volume of the cartridge 10 is made smaller, and the electrical contact surface 1131 is located behind the fourth end 14 in the second direction, making the structure of the developing cartridge 1 more compact and reducing the manufacturing cost of the developing cartridge 1.

[0073] The developing assembly includes a developing roller 131, a powder feeding roller 132, and a stirring frame 133, all of which are rotatably supported by the cartridge 10. The axes of the developing roller 131, the stirring frame 133, and the powder feeding roller 132 all extend along a first direction. The powder feeding roller 132 is disposed adjacent to the developing roller 131. The stirring frame 133 is used to stir the developer within the developing chamber, creating friction to prevent developer agglomeration. The developing roller 131 is used to contact the photosensitive drum 23 to transfer the developer to it. The developing assembly also includes a powder exit blade 134, which extends along the first direction and contacts the developing roller 131 to control the thickness of the developer layer on the developing roller 131.

[0074] like Figure 6 As shown, a transmission assembly is disposed at the first end 11. The transmission assembly includes a drive unit, which includes a power receiving unit 40 and a drive gear 43. The two can be integrally formed or combined. In the first direction, the drive gear 43 is closer to the housing 10 than the power receiving unit 40. The power receiving unit 40 is used to receive the power output from the image forming apparatus and rotate it around a drive axis extending in the first direction, thereby driving the drive gear 43 to rotate. The first cover 111 is provided with a mounting hole 1111, which extends in the first direction. The power receiving unit 40 is exposed through the mounting hole 1111 to facilitate engagement between the power receiving unit 40 and the power output shaft of the image forming apparatus.

[0075] like Figure 7 , Figure 8As shown, in the second direction, the distance between the fourth end 14 and the driving axis of the driving part is not greater than the distance between the electric contact surface 1131 and the driving axis. Specifically, the central axis of the driving part in the third direction is the third horizontal line L3, in the embodiment, the distance between the third horizontal line L3 and the second horizontal line L2 of the fourth end 14 in the second direction is the first distance H1 (i.e. the distance between the fourth end 14 and the driving axis), the distance between the third horizontal line L3 and the first horizontal line L1 in the second direction is the second distance H2 (i.e. the distance between the electric contact surface 1131 and the driving axis), in the embodiment, the first distance H1 is less than or equal to the second distance H2, when the first distance H1 is less than the second distance H2, i.e. the first horizontal line L1 is parallel to the second horizontal line L2 and the first horizontal line L1 is more backward than the second horizontal line L2 in the second direction, and the distance between the first horizontal line L1 and the second horizontal line L2 in the second direction is the difference between the first distance H1 and the second distance H2. When the first distance H1 is equal to the second distance H2, the first horizontal line L1 and the second horizontal line L2 coincide, i.e. the plane on which the point of contact between the electric contact surface 1131 and the electric contact pin on the image forming device is coplanar with the plane on which the fourth end 14 is most backward in the second direction. In the embodiment, the first distance H1 is 22-28 mm, and in the embodiment, it is preferably 25 mm. Further, in the second direction, the third distance between the fourth end 14 and the developing axis is 45-52 mm, and in the embodiment, it is preferably 49 mm.

[0076] As shown, Figure 6 The transmission assembly further includes a developing gear 41, a powder feeding gear 42, a first idler gear 44, a second idler gear 45 and a stirring gear 46. The developing gear 41 is fixedly installed at one end of the developing roller 131 located at the first end 11 through a D-shaped opening and drives the developing roller 131 to rotate. The powder feeding gear 42 is fixedly installed at one end of the powder feeding roller located at the first end 11 through a D-shaped opening and drives the powder feeding roller 132 to rotate. The stirring gear 46 is installed at one end of the stirring frame 133 located at the first end 11 and drives the stirring frame 133 to rotate. The powder feeding gear 42 is engaged with the driving gear 43 to receive power and rotate. The first idler gear 44 is simultaneously engaged with the developing gear 41 and the powder feeding gear 42. The powder feeding gear 42 transmits driving force to the developing gear 41 through the first idler gear 44, i.e. there are at least two gears between the driving gear 43 and the developing gear 41. The second idler gear 45 is simultaneously engaged with the driving gear 43 and the stirring gear 46 to transmit driving force to the stirring gear 46.

[0077] As shown, Figure 6The first end 11 is also provided with a first support 47, the first support 47 is provided with a first fixing hole 473 for supporting the developing roller 131 and a second fixing hole 474 for supporting the powder feeding roller 132, and the first support 47 is also provided with a first support column 471 for supporting the first idler 44 and a second support column 472 for supporting the driving part. In the embodiment, the first support 47 is provided separately from the box body 10. In other embodiments, the first support 47 can be provided separately from the box body 10, and the first fixing hole 473 and the second fixing hole 474 for fixing the developing assembly are provided separately from the box body 10, and the first support column 471 and the second support column 472 for supporting the transmission assembly are integrally formed with the box body 10. Alternatively, only the second support column 472 is integrally formed with the box body, and the first support column 471, the first fixing hole 472 and the second fixing hole 472 are provided separately from the box body 10.

[0078] As shown in Figures 4-6 The developing cartridge 1 also includes a guiding assembly and a pushing assembly. The guiding assembly facilitates the installation of the developing cartridge 1 to the drum assembly 2. The guiding assembly includes a first guiding part 122 at the first end 11 and a second guiding part 313 at the second end 12. In the present application, the first guiding part 122 is integrally formed with the first cover 111. In other embodiments, the first guiding part 122 can be provided separately from the first cover 111. The first guiding part 122 is in the shape of a circular arc and is guided by the first guide rail 211 to facilitate the installation of the developing cartridge 1. When the developing cartridge 1 is installed to the drum assembly 2, the pushing assembly is abutted by the force applying assembly to receive the pushing force applied by the drum assembly 2, so that the developing roller 131 is in close contact with the photosensitive drum 23. The pushing assembly includes a first pushing part 112 at the first end 11 and a second pushing part 312 at the second end 12. The first pushing part 112 is abutted by the first force applying member 212 to receive the pushing force. In the present application, the first pushing part 112 is integrally formed with the first guiding part 122 to simplify the structure of the developing cartridge 1. The first guiding part 122 is also provided with a separation member 32. The separation member 32 is a protrusion protruding in the first direction. Preferably, the separation member 32 is integrally formed with the first guiding part 122. The separation member 32 can receive the separation force applied by the separation rod 24.

[0079] As shown in Figure 5As shown, a second bracket 31 is provided at the second end 12. The second bracket 31 is fixedly installed on the cartridge 10 by screws or other means. The second bracket 31 is used to support the developing roller 131 and the powder feeding roller 132 at one end of the second end 12. The second bracket 31 is provided with a second pushing part 312 and a second guided part 313. The second pushing part 312 is symmetrically arranged with the first pushing part 112. The second pushing part 312 is abutted by the second force-applying member 222 to receive the pushing force. The second guided part 313 is a cylindrical protrusion extending along the first direction. The second guided part 313 is guided by the second guide rail 221 to facilitate the installation of the developing cartridge 1. An abutment portion 34 is also provided on the second guided portion 313. The abutment portion 34 protrudes radially relative to the second guided portion 313 and extends along a first direction. In the first direction, the abutment portion 34 at least partially overlaps with the developing roller 131. The second end 12 is also provided with a powder filling port 121 for filling the cartridge 10 with developer. The powder filling port 121 generally has a sealed cap to prevent developer from leaking through the powder filling port 121.

[0080] like Figures 9-11 As shown, in a modified example of this embodiment, the developing cartridge 1 may not have a stirring rack 133, that is, it does not need to have a stirring gear 46 and a second idler gear 45. The drive gear 43 only needs to drive the developing gear 41 and the powder feeding gear 42. Without a stirring rack 133, the number of gears and the number of components occupying space inside the cartridge 10 are further reduced, making the drive assembly more compact and the volume of the cartridge 10 smaller. It also allows the fourth end 14 to extend forward along the second direction, so that the electrical contact surface 1131 is located on the rear side of the fourth end 14 of the cartridge in the second direction, making the developing cartridge 1 more compact and reducing the manufacturing cost of the developing cartridge 1.

[0081] like Figure 11 As shown, in this embodiment, the developing cartridge 1 and the drum assembly 2 are installed together in the image forming apparatus. The developing roller 131 is located below the cartridge body 10, meaning that the developer stored inside can accumulate at the powder delivery roller 132 under the action of gravity. The powder delivery roller 132 delivers the developer to the developing roller 131 and completes the developing work with the photosensitive drum 23. Therefore, there is no need to set up a stirring rack 133, and there is no need to worry about the problem of insufficient developer supply.

[0082] like Figures 10-13 As shown, the process of separating the developing cartridge 1 from the drum assembly 2 is explained as follows:

[0083] The separation rod 24 receives the separation force applied by the separation output component on the image forming apparatus, thereby driving the separation rod 24 to move. When the separation rod 24 moves, it abuts against the separation component 32 on the developing cartridge 1, and the separation component 32 applies a separation force to the developing cartridge 1, causing the developing cartridge 1 and the photosensitive drum 2 to separate.

[0084] When the developing cartridge 1 is completely installed on the drum assembly 2, the abutting portion 34 is in contact with the abutted portion 2211 on the drum assembly 2, when the separation rod 24 receives a separation instruction, the separation rod 24 abuts against the separation piece 32 to exert a separation force on the separation piece 32, the separation piece 32 transmits the separation force to the cartridge body 10, so that the cartridge body 10 moves towards the direction away from the photosensitive drum 23, further moving the first end 11 towards the direction away from the photosensitive drum 23, the first end 11 drives the entire cartridge body 10 to swing towards the direction away from the photosensitive drum 23 against the pushing force exerted by the force exerting assembly, and then the developing roller 131 is separated from the photosensitive drum 23.

[0085] It is known that the second distance generated by the movement of the second end 12 is smaller than the second distance generated by the movement of the first end 11, i.e. in the first direction from left to right, the gap between the developing roller 131 and the photosensitive drum 23 gradually increases, i.e. the gap between the end of the developing roller 131 located at the second end 12 and the photosensitive drum 23 is smaller than the gap between the other end of the developing roller 131 located at the first end 11 and the photosensitive drum 23.

[0086] It is known that when the developing cartridge 1 is installed in the drum assembly 2, during the separation of the drum roller, due to the structure and other reasons, the support piece 114 fixedly arranged with the first cover 111 will produce a certain displacement in the third direction, when the electric contact surface 1131 is in contact with the electric contact pin on the image forming device, the electric contact pin will be pressed, so that the electric contact pin moves a certain distance upwards in the third direction, and when the drum roller is separated, the support piece 114 moves downwards along with the electric contact surface 1131 in the third direction, when the moving distance is too large, the electric contact surface 1131 may be out of contact with the electric contact pin when the electric contact pin rebounds to the length before the electric contact surface 1131 is in contact with the electric contact pin, causing the image forming device to fail to recognize the developing cartridge.

[0087] In view of the possible situation that the electric contact pin is out of contact with the electric contact surface 1131 during the separation of the drum roller, in the present application, a rib plate 1141 is arranged at the bottom of the support piece 114 in the third direction, the rib plate 1141 extends downwards in the third direction and exceeds the bottom wall of the support piece 114 in the third direction by a certain distance, after the developing cartridge 1 and the drum assembly 2 are installed in the image forming device together and the drum roller separation is started, the driving end of the developing cartridge 1 moves downwards in the third direction, the rib plate 1141 abuts against the side wall track in the image forming device to limit the developing cartridge 1 from continuing to move downwards, so that the electric contact surface 1131 and the electric contact pin do not appear to be disconnected, in order to prevent the rib plate 1141 from being deformed due to excessive force when abutting, a reinforcing rib 1142 is arranged between the rib plate 1141 and the support piece 114, the reinforcing rib 1142 can be single or multiple, which is determined by the use environment.

[0088] Embodiment two

[0089] The embodiment is compared with the first embodiment, in that the stirring frame 133 is driven by the driving part, and is otherwise identical to the first embodiment.

[0090] As shown in Figure 14 , Figure 15 In the embodiment, a connecting part 401 is further provided on the driving part, which can be connected with the stirring frame 133 to drive the stirring frame 133 to rotate. That is, the rotation axis of the driving part and the stirring frame 133 is the same. The remaining structure is identical to the first embodiment, and will not be described in detail.

[0091] By arranging the stirring frame 133 coaxially with the driving part, and driving the stirring frame 133 by the driving part, the second idler and the stirring gear are not required to be arranged simultaneously, the stirring frame 133 is moved forward, and the size of the stirring frame 133 is reduced, so that the stirring frame 133 does not interfere with the powder feeding roller 132 / developing roller 131 when stirring powder, the number of gears is not increased, and the powder can be stirred, so that the developer does not agglomerate. Because of the special mounting method, when the drum assembly is installed in the image forming device, the developer at the fourth end 14 is transported to the powder feeding roller 132 by the stirring frame 133 under the action of gravity, and then transported to the developing roller 131 for development, so that the powder stirring frame 133 at the fourth end 14 cannot be stirred and transported.

[0092] Embodiment three

[0093] As shown in Figure 16 The embodiment is further optimized on the basis of the second embodiment. In the embodiment, the first cover 111 is mounted on the first end 11 to cover at least part of the transmission assembly for protecting the transmission assembly. In order to facilitate the installation / rotation of the transmission assembly, butter or other lubricants are applied on the driving part and other rotatable parts during installation. Because the butter or other lubricants have a certain adsorption force, when disassembling, the first cover 111 needs to be disassembled first according to the disassembly sequence. Because of the adsorption force of the lubricant, the driving part is easily disassembled together with the first cover 111. The diameter of the connecting part 401 on the driving part is a first diameter D1, and the inner diameter of the mounting hole 1111 on the first cover 111 is a second diameter D2. When the first cover 111 is mounted on the box body 10, the connecting part 401 extends into the mounting hole 1111, so that the power receiving part 40 can receive driving force. In the embodiment, the second diameter D2 is greater than the first diameter D1, so that when the first cover 111 is disassembled, the adsorption force of the butter or other lubricants is not enough to disassemble the driving part together. Because there is a gap between the mounting hole 1111 and the connecting part 401, the excess lubricant can be accommodated, so that the lubricant does not accumulate between the first cover 111 and the driving part to generate a large adsorption force.

[0094] Embodiment four

[0095] As shown in Figures 17-18 The drum assembly 2 includes a first side wall 21, a second side wall 22, a bottom wall 25, a photosensitive drum 23, a transfer roller, a locking member 26, a paper guide roller 27, and a limiting opening. The photosensitive drum 23 and the transfer roller are rotatably supported on the first side wall 21 and the second side wall 22. The bottom wall 25 is arranged between the first side wall 21 and the second side wall 22, and the first side wall 21, the second side wall 22, and the bottom wall 25 enclose a mounting groove for mounting the developing cartridge 1, and the mounting groove is located at the rear side of the photosensitive drum 23 in the front-rear direction.

[0096] The locking member 26 is rotatable about a rotation axis extending in the first direction, and the locking member includes a locking portion for locking the developing cartridge 1 to the drum assembly 2 in the third direction, and a lifting portion for lifting the developing cartridge 1 relative to the drum assembly 2 when the locking member 26 is rotated, so that the developing cartridge can be removed.

[0097] The paper guide roller 27 is used for conveying a sheet to the photosensitive drum 23, and the paper guide roller 27 extends in the first direction, is rotatably supported on the first side wall 21 and the second side wall 22, and is located below the bottom wall 25. The bottom wall 25 forms a paper guide area 28 between the paper guide roller 27 and the photosensitive drum 23, and the paper guide area 28 is for the sheet conveyed from the paper guide roller 27 to pass through the bottom wall 25 from bottom to top, so that the sheet enters between the transfer roller and the photosensitive drum 23.

[0098] The bottom wall 25 of the drum assembly 2 forms a first limiting opening 251 and a second limiting opening 252, the first limiting opening 251 is close to the first side wall 21 in the first direction, the second limiting opening 252 is close to the second side wall 22, and the paper guide area 28 is located between the first limiting opening 251 and the second limiting opening 252 in the first direction. The first limiting opening 251 is specifically convex, and the first limiting opening 251 includes a first sub-limiting portion 2511 and a second sub-limiting portion 2512, the size of the first sub-limiting portion 2511 in the first direction is smaller than the size of the second sub-limiting portion 2512 in the first direction, and the first sub-limiting portion 2511 is closer to the photosensitive drum 23 in the second direction than the second sub-limiting portion 2512. The second limiting opening 252 is specifically square, and the size of the second limiting opening 252 is smaller than the size of the first limiting opening 251. Alternatively, the size of the second limiting opening 252 can also be greater than or equal to the size of the first limiting opening 251.

[0099] The present embodiment provides a developing cartridge, which differs from the first embodiment in that it further includes a limiting protrusion. The limiting protrusion is used to cooperate with the drum assembly 2 to limit the movement of the developing cartridge relative to the drum assembly, and the limiting protrusion can be detached relative to the cartridge body 10 and is located in front of the electrical contact surface 1131 in the second direction.

[0100] As shown in Figures 19-20As shown, in this embodiment, the first support 47 is provided with a first limiting protrusion 475. The first limiting protrusion 475 extends downward in the third direction and cooperates with the first limiting port 251 of the drum assembly 2 to restrict the movement of the developing cartridge 1 in the second direction, thereby improving the contact stability between the developing roller 131 and the photosensitive drum 23 and thus improving the developing effect of the photosensitive drum 23. Specifically, the first limiting protrusion 475 protrudes along the third direction at the lower end of the first support 47. The first limiting protrusion 475 is located below the first fixing hole 473 and the second fixing hole 474 in the third direction. When the developing cartridge is installed in the drum assembly 2, as... Figure 21 As shown, the first limiting protrusion 475 is inserted into the first limiting port 251, and the first limiting protrusion 575 is exposed outside through the first limiting port 251. The first limiting protrusion 475 contacts the inner wall of the first limiting port 251, thereby restricting the movement of the first limiting protrusion 475 in the first and second directions. This restricts the movement of the developing cartridge 1 in the first and second directions when it is installed in the drum assembly 2, preventing the developing cartridge 1 from moving relative to the drum assembly 2 in the first and second directions. This improves the contact stability between the developing roller 131 and the photosensitive drum 23, thereby improving the developing effect. Specifically, the first limiting protrusion 475 includes a first limiting portion 4751 and a second limiting portion (not shown in the figure). The first limiting protrusion 475 extends along a second direction. In this second direction, the first limiting portion 4751 is located in front of the second limiting portion and is also located in front of the developing axis of the developing roller 131. The first limiting portion 4751 is inserted into the first sub-limiting portion 2511 of the first limiting opening 251, and the second limiting portion is inserted into the second sub-limiting portion 2512 of the first limiting opening 251. This further enhances the cooperation between the first limiting portion 213 and the first limiting opening 251, and further improves the contact stability between the developing roller 131 and the photosensitive drum 23, thereby ensuring the developing effect. In addition, the first limiting protrusion 475 is provided with a first limiting portion 4751 and a second limiting portion, which also improves the strength of the first limiting protrusion 475 and ensures a stable cooperation between the first limiting protrusion 475 and the first limiting opening 251. The first limiting part 4751 and the second limiting part are preferably integrally formed.

[0101] Furthermore, a guide slope can be provided at the rear end of the first limiting protrusion 475 in the second direction. During the process of the first limiting protrusion 475 being inserted into and out of the first limiting port 251, the guide slope contacts the edge of the first positioning port 251 to guide the first limiting protrusion 475, making the installation and removal of the developing cartridge 1 relative to the drum assembly 2 smoother.

[0102] In this embodiment, the first limiting protrusion 475 is integrally formed with the first bracket 47. This integral formation of the first limiting protrusion 475 and the supporting first bracket 47 facilitates stable contact between the developing roller 131 and the photosensitive drum 23 of the drum assembly 2, thereby ensuring stable transfer of developer from the developing roller 131 to the photosensitive drum 23. In some embodiments, the first limiting protrusion 475 and the first bracket 47 are separate structures, or the first limiting protrusion 475 can be mounted and fixed to the first bracket 47. Furthermore, since the first limiting protrusion 475 is integrally formed with the first bracket 47 rather than with the cartridge body 10, if the developing cartridge 1 is damaged due to a drop or impact, it is not necessary to discard the entire developing cartridge 1. Instead, the first bracket 47, which is detachably connected to the cartridge body 10, can be replaced (i.e., the damaged first bracket 47 of the first limiting protrusion 475 is replaced) to reposition the developing cartridge 1 with the drum assembly 2. In this embodiment, the drive gear 43 directly meshes with the developing gear 41.

[0103] In some embodiments, the first limiting protrusion 475 may also be a separate structure from the first bracket 47. The first limiting protrusion 475 is directly formed on the first end 11 and is located below the developing roller shaft 1311 and the powder feeding roller shaft 1321 in the third direction. It is understood that the first limiting protrusion 212 may also be fixedly installed on the cartridge body 10. The first limiting protrusion can also restrict the movement of the developing cartridge 1 in the first direction and the second direction.

[0104] like Figure 22 As shown, electrode 33 is disposed at the second end 12 of the developing cartridge. Electrode 33 is used to contact the power supply unit on the image forming apparatus to receive electrical energy output by the image forming apparatus and to guide the electrical energy to the developing roller 131 and the powder feeding roller. Electrode 33 is located in the second direction between the stirring frame and the developing axis of the developing roller 131. The second end 12 of the developing cartridge is also provided with a second cover 123, which has a threaded hole 1231. The second bracket 31 also has a threaded hole corresponding to the threaded hole 1231 of the second cover 123. When installing the second cover 123, first connect electrode 33 to the powder feeding roller shaft 1321 and the developing roller shaft 1311, then wrap the second bracket 31 around one end of the powder feeding roller shaft 1321 and one end of the developing roller shaft 1311, and finally install the second cover 123 and electrode 33 together on the cartridge body 10 through the threaded hole 1231 on the second cover 123 and the threaded hole on the second bracket 31.

[0105] The other structures in this embodiment are the same as in Embodiment 1, and will not be described again here.

[0106] Example 5

[0107] like Figures 23-25 As shown, the difference between this embodiment and embodiment four is that the limiting protrusion is provided at the second end 12.

[0108] likeFigures 23-25 In the embodiment, the second limiting protrusion 124 is arranged on the second end 12 of the developing cartridge. The second limiting protrusion 124 cooperates with the second limiting port 252 of the drum assembly to limit the movement of the developing cartridge in the second direction, thereby improving the contact stability between the developing roller 131 and the photosensitive drum 23, and improving the developing effect. In the embodiment, the first support 47 is not arranged. Of course, the first support 47 can be arranged according to the situation.

[0109] Specifically, the second limiting protrusion 124 is formed on the lower end of the second cover 123 in the third direction. In the second direction, the second limiting protrusion 124 is located in front of the electrical contact surface 1131. When the second cover 123 is installed on the cartridge body 10, the second limiting protrusion 124 is located below the developing roller shaft 1311 (the developing axis of the developing roller 131) and the powder feeding roller shaft 1321 (the rotation axis of the powder feeding roller) in the third direction, and the second limiting protrusion 124 is located behind the developing roller shaft 1311 (the developing axis of the developing roller 131) and the powder feeding roller shaft 1321 (the rotation axis of the powder feeding roller) in the second direction. When the developing cartridge is installed in the drum assembly, the second limiting protrusion 124 is inserted into the second limiting port 252, the second limiting protrusion 124 is in contact with the inner wall of the second limiting port 252, and the movement of the second limiting protrusion 124 in the first direction and the second direction is limited by the second limiting port 252. When the developing cartridge 1 is installed in the drum assembly 2, the movement of the developing cartridge 1 in the second direction is limited, the contact stability between the developing roller 131 and the photosensitive drum 23 is improved, and the developing effect is improved. If the second limiting protrusion 124 is damaged, the second cover 123 can be disassembled and replaced to reposition the developing cartridge 1 and the drum assembly 2.

[0110] In the embodiment, the second limiting protrusion 124 of the second end 12 of the developing cartridge is integrally formed with the second cover 123. Alternatively, the second limiting protrusion 124 is fixedly installed on the second cover 123, which can also limit the movement of the developing cartridge in the second direction.

[0111] In some other embodiments, the second limiting protrusion is arranged on the second support 31 or directly arranged on the cartridge body 10.

[0112] In some embodiments, the second end 12 of the developing cartridge is provided with a detected piece. The detected piece is used to trigger the detection piece of the image forming apparatus, so that the developing cartridge is recognized by the image forming apparatus. Part of the detected piece is exposed to the second cover 123, and the other part is covered by the second cover 123 to protect the detected piece.

[0113] The other structures of the embodiment are the same as those of Embodiment 1, which will not be described here.

[0114] Embodiment Six

[0115] As Figures 26-27 shown, the difference between this embodiment and embodiment four, embodiment five is that the setting of the limiting protrusions is different.

[0116] In this embodiment, the first limiting protrusion 475 is arranged on the first cover 111, and the second limiting protrusion 124 is arranged on the second cover 123. The first limiting protrusion 212 cooperates with the first side wall 21 of the drum assembly, and the second limiting protrusion 124 cooperates with the second side wall 22, thereby limiting the movement of the developing cartridge in the first direction and the second direction.

[0117] As Figure 26 shown, the first limiting protrusion 475 is integrally formed with the first cover 111. The first limiting protrusion 475 is located at the right end surface of the first cover 111 in the first direction (the end surface facing away from the cartridge body 10). The first limiting protrusion 475 extends in the first direction away from the second end 12 of the cartridge body. The first limiting protrusion 475 is in the shape of a long block. The first limiting protrusion 475 can also be mounted and fixed to the first cover 111.

[0118] As Figure 27 shown, the second limiting protrusion 124 is integrally formed with the second cover 123. The second limiting protrusion 124 is located at the left end surface of the second cover 123 in the first direction (the end surface facing away from the cartridge body 10). The second limiting protrusion 124 extends in the first direction away from the first end 11 of the cartridge body. The second limiting protrusion 124 is in the shape of a curve. The second limiting protrusion 124 can also be mounted and fixed to the second cover 123.

[0119] In the second direction, the first limiting protrusion 475 and the second limiting protrusion 124 are located in front of the electrical contact surface 1131.

[0120] When the developing cartridge is installed in the drum assembly 2, the first limiting protrusion 475 cooperates with the side of the first side wall 21 facing the inside of the drum assembly, and the second limiting protrusion 124 cooperates with the side of the second side wall 22 facing the inside of the drum assembly, so that the movement of the developing cartridge in the second direction is limited, improving the contact stability of the developing roller 131 and the photosensitive drum 23, thereby improving the developing effect.

[0121] In some embodiments, the first end 11 of the developing cartridge can also not be provided with the first cover 111, and the second end 12 of the developing cartridge can also not be provided with the second cover 123. The first limiting protrusion 475 is directly arranged on the first end 11, and the second limiting protrusion 124 is directly arranged on the second end 12 of the cartridge body. The first limiting protrusion 475 can also cooperate with the first side wall 21, and the second limiting protrusion 124 can also cooperate with the second side wall 22, so that the movement of the developing cartridge in the first direction and the second direction is limited.

[0122] The other structures of this embodiment are the same as those of embodiment one, and will not be described here again.

[0123] Example 7

[0124] like Figures 28-30 As shown, the difference between this embodiment and embodiment four is that the structure of the box 10 is different.

[0125] In this embodiment, as Figure 28 As shown, when viewed along L4, which is the first direction of the developing cartridge, the electrical contact surface 1131 is located behind the fourth end 14 in the second direction; the handle 141 does not protrude rearward from the fourth end 14 in the second direction.

[0126] The push assembly includes a first push part 112a disposed on the first cover 111 and a second push part 312a disposed on the second cover 123. In the second direction, the first push part 112a is located at the rear end of the first cover 111 and the second push part 312a is located at the rear end of the second cover 123.

[0127] In some embodiments, the front end of the electrical contact surface 1131 in the second direction is flush with the fourth end 14. In some embodiments, the rear end of the electrical contact surface 1131 in the second direction is flush with the fourth end 14. Figure 31 As shown, in some embodiments, when viewed along the first direction of the developing cartridge, the electrical contact surface 1131 is located at the fourth end 14 in the second direction; specifically, the electrical contact surface 1131 may overlap with the fourth end 14.

[0128] like Figure 30 As shown, in this embodiment, the distance from the rotation axis (developing axis) of the developing roller 131 to the fourth end 14 is 56-70 mm. Specifically, the cartridge 10 includes a rear housing 142, which is located at the fourth end 14 of the cartridge (i.e., the rear end of the housing 10). The rear housing 142 can be a plane parallel to the third direction. The distance D3 from the developing axis of the developing roller 131 to the rear housing 142 is 56-70 mm, preferably 58 mm, 61 mm, 63 mm, or 66 mm. Within this range, viewed along the axial direction of the developing cartridge, the electrical contact surface 1131 is located behind the fourth end 14 in the second direction, or the electrical contact surface 1131 overlaps with the fourth end 14 in the second direction. In the second direction, the distance D4 from the farthest point of the developing roller 132 away from the rear housing 142 to the rear housing 142 is 60-75 mm, preferably 63 mm, 65 mm, 67 mm, or 70 mm. In the second direction, the distance D5 from the rotation axis (drive axis) of the drive unit to the rear housing 142 is 44-52 mm, preferably 45 mm, 45 mm, 48 mm or 50 mm.

[0129] like Figure 32 and Figure 33As shown, the cartridge 10 includes a powder container 73 and a developing container 71. The powder container 73 is located at the fourth end 14 of the cartridge, and the developing container 71 is located at the third end 13. A partition is connected between the bottom walls of the powder container 73 and the developing container 71, separating the powder container and the developing container 71. The powder container is used to hold developer and a stirring rack 133, and the developing container is used to hold the developing roller 131 and the powder delivery roller 132. Ribs 72 are disposed on the inner side of the bottom wall 711 of the developing container 71. The bottom wall 711 of the developing container is lowered relative to the ribs 72, increasing the capacity of the developing container 71 to hold developer, thereby increasing the capacity of the cartridge 10. The ribs 72 include first ribs 721 and second ribs 722. A plurality of first ribs 721 extend along a second direction and are perpendicular to the developing roller 131, and a plurality of second ribs 722 extend along the second direction and are inclined relative to the developing roller 131. The portions of the first rib 721 and the second rib 722 closest to the powder feeding roller 132 bend upwards and downwards to avoid the powder feeding roller 132. The outer side of the front portion of the bottom wall 711 of the developing chamber 71 extends forward in a generally planar shape. The bottom wall 711 of the developing chamber is provided with a paper guide portion to facilitate the sheet material passing through the paper guide area of ​​the drum assembly and entering between the photosensitive drum and the transfer roller.

[0130] As can be seen, when viewed along the first direction, the projection of the drive unit and the partition 74 between the bottom walls of the powder chamber 73 and the developing chamber 71 do not overlap. In the second direction, the drive unit is located in front of the partition 74, making the driving force transmitted by the drive unit to the developing roller 131 and the powder feeding roller more stable. Furthermore, when viewed along the first direction, the projection of the electrode 33 and the partition 74 do not overlap. In the second direction, the electrode 33 is located in front of the partition 74.

[0131] Example 8

[0132] like Figures 34-38 As shown, the difference between this embodiment and Embodiment 1 lies in the different structures of the box body, the identification component, and the second pushing part.

[0133] like Figure 34 As shown, in this embodiment, the box body 10 includes a cover plate 101 and a main body 102. The cover plate 101 and the main body 102 are joined together by welding. In a third-party upward direction, the cover plate 101 is at least partially located above the main body 102, covering the upper part of the main body 102. The cover plate 101 has a first joint portion 1011, and the main body 102 has a second joint portion 1021. The first joint portion 1011 and the second joint portion 1012 are firmly joined together by welding, and there is no relatively inclined portion at the weld.

[0134] like Figure 34As shown, the main body 102 is provided with a first reinforcing portion 1022 near the third end 12, the first reinforcing portion 1022 is composed of a plurality of ribs, the plurality of ribs are arranged at intervals in the first direction and have a length extending in the second direction, and the plurality of ribs are located on the inner surface of the main body 102. The main body 102 is also provided with a second reinforcing portion 1023, the second reinforcing portion 1023 is a crossbeam extending in the first direction, the second reinforcing portion 1023 can support the strength of the entire main body, and the powder outlet knife 134 is installed at the second reinforcing portion 1023.

[0135] As shown, Figures 35-37 As shown, the developing cartridge 1 also includes an electrode 33, the electrode 33 is located at the second end 12, the electrode 33 is used to receive an external voltage, the electrode 33 is electrically connected with at least one of the developing roller 131 and the powder feeding roller 132, and the electrode 33 is electrically connected with both the developing roller 131 and the powder feeding roller 132 in the embodiment to transmit the voltage. The electrode 33 is preferably a conductive steel sheet in the embodiment, and can be other conductive materials in other embodiments. The electrode 33 is supported by at least one of the second bearing 33 and the cartridge body 10, and the electrode 33 includes a first electrical contact portion 331, a second electrical contact portion 332, and a third electrical contact portion 333. The first electrical contact portion 331 is a block or a sheet extending in the first direction, and is used to receive an external voltage. The second electrical contact portion 332 is a spring sheet, and is in contact with the developing roller 131 to transmit the voltage. The third electrical contact portion 333 is a ring, and is in contact with the powder feeding roller 132 to transmit the voltage.

[0136] As shown, Figure 36 As shown, the second support 31 is provided with a relief portion 314, the relief portion 314 is a through hole or a notch in the first direction, and the relief portion 314 exposes the first electrical contact portion 331 to receive the voltage. The second pushing portion 312 is provided with a cooperating portion 3121 on the end portion away from the third end 13, the cooperating portion 3121 is engaged with the first electrical contact portion 331, the cooperating portion 3121 is a wedge-shaped protrusion, the cooperating portion 3121 supports the first electrical contact portion 331, and ensures that the first electrical contact portion 331 stably receives the external voltage. In the second direction, the first electrical contact portion 1211 is at least partially farther away from the rotation axis of the developing roller 131 than the second pushing portion 312.

[0137] As shown, Figure 37 As shown, there is no overlapping part between the driving portion and the powder outlet knife 134 in the first direction, there is no overlapping part between the driving portion and the second reinforcing portion 1023, there is no overlapping part between the electrode 33 and the second reinforcing portion 1023, and there is also no overlapping part between the electrode 33 and the driving portion.

[0138] As shown, Figures 35-38As shown, the drum assembly 2 is provided with a power supply part 223, which is attached to the end of the second force applying member 222, and the power supply part 223 can receive voltage from the image forming apparatus. When the developing cartridge 1 is installed on the drum assembly 2, the power supply part 223 is in contact with the first electrical contact part 331 to transfer voltage, so as to transfer the voltage to the developing roller 131 and the powder feeding roller 132. The second force applying member 222 applies a pushing force to the second pushing part 312. That is, the second force applying member 222, the power supply part 223, the first electrical contact part 331 and the second pushing part 312 are arranged in sequence, and the second force applying member 222 can be in direct contact with the second pushing part 312 or in indirect contact.

[0139] The other structures of the embodiment are the same as those of the first embodiment, and will not be described herein.

[0140] The above only describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A developing cartridge comprising: a cartridge body for storing a developer, the cartridge body having a first end and a second end disposed opposite to each other in a first direction, a third end and a fourth end disposed opposite to each other in a second direction, and a fifth end and a sixth end disposed opposite to each other in a third direction, the first direction, the second direction, and the third direction being orthogonal to each other; a developing roller located at the third end, rotatable about a developing axis extending in the first direction, and coaxially rotatable with a developing gear; a drive portion located at the first end, receiving a power and rotatable about a drive axis extending in the first direction, and comprising a drive gear coaxially rotatable; a storage medium comprising an electrical contact surface located at the first end, the electrical contact surface facing upward in the third direction; characterized in that, in the second direction, a distance between the fourth end and the drive axis is not greater than a distance between the electrical contact surface and the drive axis.

2. The process cartridge according to claim 1, wherein, The electrical contact surface is located behind the fourth end in the first direction.

3. The process cartridge of claim 1, wherein, The electrical contact surface is flush with the fourth end in the second direction at a front end of the electrical contact surface; or the electrical contact surface is flush with the fourth end in the second direction at a rear end of the electrical contact surface.

4. The process cartridge of claim 1, wherein, In the second direction, the developing axis is located 56-70 mm away from the fourth end.

5. The process cartridge of claim 4 wherein, In the second direction, the developing roller is located 60-75 mm away from the fourth end at a farthest point of the developing roller away from the fourth end.

6. The process cartridge of claim 4 wherein, In the second direction, the drive axis is located 44-52 mm away from the fourth end.

7. The process cartridge of claim 1, wherein, The drive gear and the developing gear are connected by at least two gears, and a distance between the drive axis and the fourth end is 22-28 mm.

8. The process cartridge of claim 7 wherein, A distance between the developing axis and the fourth end is 45-52 mm.

9. The process cartridge of claim 7 wherein, The second end is provided with an electrode and a push portion, the electrode is configured to receive an external voltage, the electrode is at least partially supported by the push portion, an end portion of the push portion away from the third end is provided with a matching portion, the electrode comprises a first electrical contact portion, the first electrical contact portion is engaged with the matching portion, In the second direction, the first electrical contact portion is at least partially farther away from the developing axis than the push portion.

10. The developer cartridge of claim 1, wherein, The first end further comprises a support, in the third direction, the support is located below the electrical contact surface, and the support supports the electrical contact surface.

Images