Developing box

Abstract

The present application relates to a developing cartridge which can be mounted in an image forming apparatus having a door cover together with a drum assembly having a photosensitive drum. The developing box comprises a box body, a developing roller, a second chip and a force receiving part, the box body is used for accommodating a developing agent, the box body is oppositely provided with a first end and a second end in a first direction, and the box body is oppositely provided with a third end and a fourth end in a second direction; the developing roller can rotate around an axis extending in a first direction; the second chip comprises a second electric contact surface which can be electrically connected with a second electric contact pin of the image forming device, and the second electric contact surface is arranged at the first end; the force receiving part is used for being matched with the door cover, so that the developing roller is attached to the photosensitive drum. In the application, the developing box has the advantage of simple structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of imaging equipment, in particular to a developing cartridge. BACKGROUND

[0002] The developing cartridge is a widely used detachable part of an image forming device. The developing cartridge can be installed on a drum assembly and mounted to the image forming device together with the drum assembly. The drum assembly is provided with a pushing piece, and the developing cartridge is provided with a pushing protrusion. When the developing cartridge is installed on the drum assembly, the pushing piece generates a pushing force on the pushing protrusion, so that the developing roller on the developing cartridge and the photosensitive drum on the drum assembly can be tightly attached. Therefore, in the prior art, structures for applying the pushing force need to be provided on both the developing cartridge and the drum assembly, which has the disadvantage of complex structure. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a developing cartridge for simplifying the structure of the developing cartridge.

[0004] The developing cartridge provided by the present application can be installed in an image forming device together with a drum assembly having a photosensitive drum, and the image forming device has a door cover. The developing cartridge comprises:

[0005] a cartridge body for containing a developer, the cartridge body is oppositely provided with a first end and a second end in a first direction, oppositely provided with a third end and a fourth end in a second direction, and oppositely provided with a fifth end and a sixth end in a third direction;

[0006] a developing roller capable of rotating around an axis extending along the first direction;

[0007] a second chip comprising a second electrical contact surface capable of being electrically connected with a second electrical contact pin of the image forming device, the second electrical contact surface being arranged at the first end;

[0008] a force receiving portion for cooperating with the door cover to attach the developing roller to the photosensitive drum.

[0009] In a possible design, the force receiving portion comprises an elastic member arranged at a position close to the fourth end, and the force receiving portion is capable of abutting against the door cover and moving relative to the cartridge body.

[0010] In a possible design, the force receiving portion further comprises a pushing portion, and the elastic member connects the pushing portion and the cartridge body. The pushing portion abuts against a door cover protrusion on the door cover to stretch / compress the elastic member and apply a pushing force on the developing cartridge towards the photosensitive drum.

[0011] In a possible design, the pushing portion is capable of rotating relative to the cartridge body.

[0012] In a possible design, the pushing part swings relative to the cartridge body towards the third end when the pushing part abuts against the door cover protrusion; and the elastic member drives the pushing part to reset under the elastic force when the pushing part is separated from the door cover protrusion.

[0013] In a possible design, the pushing part is able to translate relative to the cartridge body.

[0014] In a possible design, the pushing part is able to translate relative to the cartridge body at an angle to the second direction and towards the fifth end when the pushing part abuts against the door cover protrusion, so as to exert a force on the cartridge body at an angle to the second direction and towards the fifth end.

[0015] The force has a component along the second direction towards the photosensitive drum, which is the pushing force.

[0016] The force has a component along the third direction towards the fifth end, which is the lifting force, and the cartridge body moves along the third direction relative to the drum assembly under the lifting force, so that the second electric contact surface is electrically connected with the second electric contact pin.

[0017] In a possible design, the force receiving part includes a first force receiving part arranged at the first end and a second force receiving part arranged at the second end.

[0018] In a possible design, the developing cartridge further includes a protective cover, which is detachably arranged at the first end, and the first force receiving part is arranged on the protective cover.

[0019] In a possible design, the developing cartridge further includes a lifting part, which is able to cooperate with the door cover to drive the developing cartridge to move along the third direction, so that the second electric contact surface is electrically connected with the second electric contact pin.

[0020] In a possible design, in the third direction, the lifting part at least partially overlaps with the force receiving part or the lifting part is located above the force receiving part.

[0021] In a possible design, the second electric contact surface is located between the force receiving part and the developing roller in the second direction.

[0022] In this application, when the door cover is closed, the door cover protrusion on the door cover is able to exert a lifting force on the lifting part, so that the second electric contact surface is in contact with the second electric contact pin, and the image forming apparatus identifies the developing cartridge; and the door cover protrusion is also able to exert a pushing force on the pushing part, so that the developing roller is in contact with the photosensitive drum, thereby completing the developing work. Therefore, it is not necessary to arrange the pushing member on the side wall of the developing cartridge and it is also not necessary to arrange the force applying member for exerting the pushing force on the developing cartridge on the drum assembly, which simplifies the structure of the developing cartridge and reduces the manufacturing cost of the developing cartridge and the drum assembly.

[0023] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application, as claimed. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly;

[0025] Figure 2 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly; Figure 1 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly;

[0026] Figure 3 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly;

[0027] Figure 4 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly; Figure 3 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly;

[0028] Figure 5 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly; Figure 4 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly;

[0029] Figure 6 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly; Figure 3 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly;

[0030] Figure 7 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly; Figure 3 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly;

[0031] Figure 8 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly; Figure 3 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly;

[0032] Figure 9 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly; Figure 8 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly;

[0033] Figure 10 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly; Figure 8 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly;

[0034] Figure 11 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly; Figure 3 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly;

[0035] Figure 12 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly; Figure 11 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly;

[0036] Figure 13 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly; Figure 11 Structure diagram of the developing cartridge provided by the present application installed in a drum assembly;

[0037] Figure 14 for Figure 11 Another structural diagram of the second chip rack in the chip;

[0038] Figure 15 for Figure 3 A schematic diagram of the structure of the second chip rack in embodiment four;

[0039] Figure 16 for Figure 1 A partial structural diagram of the second end of the developing cartridge;

[0040] Figure 17 for Figure 16 A magnified view of a portion of region I;

[0041] Figure 18 for Figure 3 A schematic diagram of the developing cassette and drum assembly being installed in an image forming apparatus, with the door cover in the open position;

[0042] Figure 19 for Figure 3 A schematic diagram of the development cassette and drum assembly being installed in an image forming apparatus, wherein the door cover changes from an open state to a closed state;

[0043] Figure 20 This is a schematic diagram of the structure in Embodiment 1, showing the developer cartridge and drum assembly installed in the image forming apparatus, with the door cover in the closed state;

[0044] Figure 21 for Figure 20 A schematic diagram showing the structure of the developing cassette, photosensitive drum, and door cover;

[0045] Figure 22 This is a schematic diagram of the developing cartridge provided in this application in Embodiment 2;

[0046] Figure 23 for Figure 22 A schematic diagram of the structure of the protective cover;

[0047] Figure 24 This is a schematic diagram of the structure in Embodiment 2, showing the developer cartridge and drum assembly installed in the image forming apparatus, with the door cover in the closed state;

[0048] Figure 25 for Figure 24 A schematic diagram showing the structure of the developing cassette, photosensitive drum, and door cover;

[0049] Figure 26 This is a schematic diagram of the developing cartridge provided in this application in Embodiment 3;

[0050] Figure 27 for Figure 26Partial structure diagram of the second end of the developing cartridge in

[0051] Figure 28 For Figure 26 Partial structure explosion diagram of the developing cartridge in

[0052] Figure 29 For Figure 26 Structure diagram of the developing cartridge in cooperation with the photosensitive drum and the door cover in the opened state

[0053] Figure 30 For Figure 26 Structure diagram of the developing cartridge in cooperation with the photosensitive drum and the door cover in the opened state

[0054] Figure 31 Structure diagram of the protective cover of the developing cartridge in the embodiment three in the variation example

[0055] Figure 32 For Figure 31 Structure diagram of the protective cover of the developing cartridge in another view

[0056] Figure 33 For

[0057] Figure 34 Structure diagram of the developing cartridge in the embodiment four

[0058] Figure 35 For Figure 34 Partial structure diagram of the second end of the developing cartridge in

[0059] Figure 36 For Figure 34 Structure diagram of the developing cartridge in cooperation with the photosensitive drum and the door cover in the opened state

[0060] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application. DETAILED DESCRIPTION

[0061] In order to better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0062] It should be clear that the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0063] The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in the description of the embodiments of the present application and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0064] It should be understood that the term "and / or" used herein only means an association relationship of the associated objects, and means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0065] It should be noted that the "up", "down", "left", "right" and other orientation words described in the embodiments of the present application are described from the angle shown in the drawings, and should not be understood as a limitation on the embodiments of the present application. In addition, in the context, it should also be understood that when referring to an element connected to another element "on" or "under", it can be directly connected to another element "on" or "under" or indirectly connected to another element "on" or "under" through an intermediate element.

[0066] It should be noted that the "first", "second" and other ordinal terms described in the embodiments of the present application are only a naming, and should not be understood as a limitation on the order and quantity of the components in the present application. In the context, when the component name is crowned with "second component" or "first component", it does not necessarily have the corresponding "first component" or "second component", but can be a mere noun, without quantity and order meaning.

[0067] The embodiments of the present application provide a developing cartridge 1 which can be detachably installed on a drum assembly 2 and can be installed together with the drum assembly 2 into an image forming device.

[0068] For ease of description, the left-right direction of the developing cartridge 1 is defined as the first direction X, the front-rear direction is defined as the second direction Y, and the up-down direction is defined as the third direction Z. At the same time, the first direction X, the second direction Y and the third direction Z when describing the drum assembly 2 refer to the corresponding directions when the developing cartridge 1 is installed on the drum assembly 2.

[0069] The developing cartridge 1 has a cartridge body, and the cartridge body has a containing cavity for storing a developer. The cartridge body is oppositely provided with a first end 11 and a second end 12 in the first direction X, oppositely provided with a third end 13 and a fourth end 14 in the second direction Y, and oppositely provided with a fifth end 15 and a sixth end 16 in the third direction Z.

[0070] As shown in FIG. 1, the developing cartridge 1 has a cartridge body 10, and the cartridge body 10 has a containing cavity 20 for storing a developer. Figure 1 , Figure 2As shown, the drum assembly 2 has a drum frame with a first sidewall 21 and a second sidewall 22 in a first direction X. The photosensitive drum 24 is rotatably supported on the first sidewall 21 and the second sidewall 22 and is capable of rotating about a rotation axis extending in the first direction X. When the developing cartridge 1 is installed in the drum assembly 2, the first sidewall 21 is adjacent to the first end 11 of the developing cartridge 1, and the second sidewall 22 is adjacent to the second end 12 of the developing cartridge 1.

[0071] The first sidewall 21 has a first guide rail 211, and the second sidewall 22 has a second guide rail 221. The first guide rail 211 and the second guide rail 221 are symmetrically arranged to guide the development cartridge 1 when it is installed in the drum assembly 2, so as to facilitate the installation of the development cartridge 1 into the drum assembly 2.

[0072] The drum assembly 2 has a first support 25 located on its first sidewall 21. A first chip holder 26 is movably disposed within the first support 25, and the first chip holder 26 has a first chip 27 storing information about the drum assembly 2. When the drum assembly 2 is installed in the image forming apparatus, the first chip 27 can be electrically connected to the image forming apparatus, transmitting the information from the drum assembly 2 to the image forming apparatus. Specifically, the first chip 27 has a first electrical contact surface (not shown in the figure), and the first chip 27 completes the electrical connection by contacting electrical terminals in the image forming apparatus through the first electrical contact surface.

[0073] The drum assembly 2 has a locking part 23 near the second side wall 22. The locking part 23 is rotatable relative to the drum assembly 2 and is used to lock / remove the developing cartridge 1. When the developing cartridge 1 is installed in the drum assembly 2, the locking part 23 cooperates with the developing cartridge 1 to fix the developing cartridge 1 inside the drum assembly 2. When the developing cartridge 1 is removed from the drum assembly 2, the locking part 23 is released.

[0074] like Figure 3 As shown, the developing box 1 includes a developing component, a transmission component, and an identification component.

[0075] The developing assembly includes a developing roller 131, a stirring frame (not shown), and a powder feeding roller (not shown). The developing roller 131, stirring frame, and powder feeding roller are all rotatably mounted between a first end 11 and a second end 12 about an axis extending along a first direction X. The powder feeding roller is disposed adjacent to the developing roller 131, and in the second direction Y, the developing roller 131 is closer to the third end 13 of the cartridge than the powder feeding roller. The stirring frame is used to stir the developer within the receiving cavity, preventing developer agglomeration and providing sufficient developer to the powder feeding roller, enabling the powder feeding roller to properly supply powder to the developing roller 131.

[0076] like Figure 4 and Figure 5As shown, the transmission assembly is arranged at the first end 11 of the cartridge body, and includes a driving part 40 rotatably mounted on the first end 11, the rotation axis of the driving part 40 is parallel to the first direction X, the driving part 40 can receive driving force from the image forming device and transmit the driving force to drive the developing cartridge 1 to operate.

[0077] The transmission assembly further includes a developing gear 41, a powder feeding gear 42, a stirring gear 43 and an idler gear 44. The developing gear 41 is coaxially fixedly mounted on one end of the developing roller 131 close to the first end 11 of the cartridge body, can receive driving force from the driving part 40 and drive the developing roller 131 to rotate; the powder feeding gear 42 is coaxially fixedly mounted on one end of the powder feeding roller close to the first end 11 of the cartridge body, can receive driving force from the driving part 40 and drive the powder feeding roller to rotate; the stirring gear 43 is coaxially fixedly mounted on one end of the stirring frame close to the first end 11 of the cartridge body, can receive driving force from the driving part 40 and drive the stirring frame to rotate. The idler gear 43 is rotatably mounted on the first end 11 of the cartridge body, connects the driving part 40 and the stirring gear 43, so as to transmit the driving force received by the driving part 40 to the stirring gear 43. In addition, the developing cartridge 1 further includes a cover 111 arranged at the first end 11, the cover 111 covers at least part of the transmission assembly, so as to protect the transmission assembly.

[0078] As shown, Figure 3 The identification assembly includes a second chip holder 30 and a second chip 31, the second chip holder 30 is arranged at the first end 11 of the cartridge body, and the second chip 31 is arranged at the end of the second chip holder 30 in the third direction Z. The second chip 31 is used to store relevant information of the developing cartridge 1, such as whether it is a new cartridge, storage information, consumable capacity, number of printable paper, etc., and transmit the relevant information of the developing cartridge 1 to the image forming device when the developing cartridge 1 and the drum assembly 2 are installed in the image forming device.

[0079] Specifically, the second chip 31 is provided with a second electrical contact surface, which can be electrically connected with an electrical terminal in the image forming device. The second electrical contact surface can be directly located on the second chip 31 and electrically connected with the second chip 31, for example, they can be detachably connected or integrally formed, or they can be electrically connected through an intermediate part.

[0080] It can be understood that the second chip holder 30 can be arranged on the cover 111, and various embodiments of the connection between the second chip holder 30 and the cover 111 are provided herein.

[0081] Embodiment one: as Figure 6 and Figure 7As shown, the cover 111 is provided with a limiting portion 1112 and a first clamping portion 1113, the limiting portion 1112 is arranged opposite to the first clamping portion 1113, and two limiting portions 1112 and two first clamping portions 1113 are arranged on the cover 111 respectively, so that the second chip rack 30 can be clamped to the cover 111 along the first direction X. The second chip rack 30 is provided with a first clamping jaw portion 301, the first clamping jaw portion 301 is clamped with the first clamping portion 1113 when the second chip rack 30 is fixed on the cover 111, and the limiting portion 1112 limits the first clamping jaw portion 301 to prevent the first clamping jaw portion 301 from being separated from the first clamping portion 1113.

[0082] Embodiment two: as shown in Figure 8 , Figure 9 and Figure 10 , the cover 111 is provided with a first mounting portion 1114, and the second chip rack 30 is clamped to the cover 111 along the third direction Z. Specifically, the first mounting portion 1114 has a second clamping portion 11141 and a first groove 11142; the second chip rack 30 has a first clamping jaw portion 301 and a first jaw portion 302, and the first clamping jaw portion 301 is arranged at one end of the first jaw portion 302 in the third direction Z. The mounting method of the second chip rack 30 is: mounting the second chip rack 30 on the first mounting portion 1114 along the third direction Z, the width of the first jaw portion 302 in the first direction X is the same as the width of the first groove 11142 in the first direction X, the first jaw portion 302 cooperates with the first groove 11142, the first clamping jaw portion 301 is clamped with the second clamping portion 11141, so as to fix the second chip rack 30 on the first mounting portion 1114, and prevent the second chip rack 30 from shaking left and right in the first direction X.

[0083] Embodiment three: as shown in Figures 11-14As shown, the cover 111 is provided with a second mounting portion 1115, and the second mounting portion 1115 is provided with a first mounting hole 11151 extending along the third direction Z, and the end of the first mounting hole 11151 in the third direction Z is provided with a limiting hole 11152. The second chip rack 30 is provided with a cylindrical portion 303 capable of cooperating with the first mounting hole 11151, and the cylindrical portion 303 is provided with a second clamping portion 304 capable of elastically deforming relative to the cylindrical portion 303. When the second chip rack 30 is mounted on the second mounting portion 1115 along the third direction Z, the second clamping portion 304 is elastically deformed by being pressed by the first mounting hole 11151, so that the cylindrical portion 303 can enter the first mounting hole 11151; after the cylindrical portion 303 is mounted in place, the second clamping portion 304 is clamped with the bottom end of the second mounting portion 1115 in the third direction Z. Wherein, the outer diameter of the cylindrical portion 303 is the same as the diameter of the first mounting hole 11151, and the outer diameter of the second clamping portion 304 is greater than the diameter of the first mounting hole 11151. The cylindrical portion 303 is further provided with a limiting protrusion 305, which can cooperate with the limiting hole 11152 after the cylindrical portion 303 is mounted in place, so as to prevent the second chip rack 30 from rotating relative to the second mounting portion 1115.

[0084] Embodiment four: the embodiment changes the third embodiment, specifically, as Figure 15 As shown, the cylindrical portion 303 of the second chip rack 30 is a solid columnar body, and the second clamping portion 304 is not provided on the cylindrical portion 303, but a thread 306 is provided on the outside of the cylindrical portion 303, and a corresponding matching thread (not shown in the figure) is provided inside the first mounting hole 11151, so that the second chip rack 30 can be connected with the first mounting hole 11151 through the thread. In addition, the second chip rack 30 is still provided with a limiting protrusion 305, and the positioning mode is exactly the same as that in the third embodiment, and will not be described in detail here.

[0085] It can be understood that the above-mentioned embodiments are only several relatively optimal ways of fixing the second chip rack 30 on the cover 111. In other embodiments, the second chip rack 30 can be directly fixed on the box body, that is, the second chip rack 30 is integrally formed with the cover 111, or the second chip 31 can be directly fixed on the cover 111, and the specific mode will not be limited here.

[0086] Further, the developing cartridge 1 further has a first guide portion 1111 on the first end 11, the first guide portion 1111 is in a column shape extending along the first direction X, and has a second guide portion 1211 on the second end 12. When the developing cartridge 1 is installed in the drum assembly 2, the first guide portion 1111 can be matched with the first guide rail 211, and the second guide portion 1211 can be matched with the second guide rail 221, so as to guide the developing cartridge 1. It can be understood that the first guide portion 1111 can be arranged on the cover 111. In order to facilitate the user to take out the developing cartridge 1 from the drum assembly 2, the developing cartridge 1 has a handle portion 141 on the fourth end 14, and the user can take out the developing cartridge 1 from the drum assembly 2 through the handle portion 141.

[0087] Preferably, the first guide portion 1111 and the second guide portion 1211 are at least partially overlapped in the projection in the first direction.

[0088] As shown in Figure 16 , the developing cartridge 1 further has a powder filling port 127 on the second end 12, the powder filling port 127 penetrates the second end 12 in the first direction X, and the powder filling port 127 is used for the developer to enter the cartridge body. The powder filling port 127 is provided with a matched cover, and the cover is used for sealing the powder filling port 127 to prevent the developer in the cartridge body from leaking.

[0089] As shown in Figure 16 , the second end 12 of the developing cartridge 1 is provided with a bearing 121, and the bearing 121 is provided with an electrode 1212. The second guide portion 1211 is also arranged on the bearing 121, and the electrode 1212 and the second guide portion 1211 extend outwardly along the first direction X. The electrode 1212 can be electrically connected with the image forming apparatus, and is used for supplying power to the developing roller 131. Figure 5 As shown in , the developing roller 131 comprises a roller main body 1311 and a roller shaft 1312. The electrode 1212 is electrically connected with the roller main body 1311, and is not electrically connected with the roller shaft 1312. That is, an insulating material or the like can be covered on the roller shaft 1312, so that the electrode 1212 cannot be electrically connected with the roller shaft 1312. In other embodiments, the roller shaft 1312 can be electrically connected, and the electrode 1212 is electrically connected with the roller main body 1311 through the roller shaft 1312.

[0090] As shown in

[0091] , the developing cartridge 1 further has a locking portion 126 on the second end 12. When the developing cartridge 1 is installed in the drum assembly 2, the locking portion 126 can be matched with the locking portion 23 on the drum assembly 2, so as to fix the developing cartridge 1 in the drum assembly 2. In other embodiments, the locking portion 126 can also be arranged on the first end 11 of the cartridge body, which is not limited here. Figure 18 Figure 19As shown, the image forming device has a door cover 90 and a side wall 91, the door cover 90 is provided with two door cover protrusions 901, the two door cover protrusions 901 are symmetrically arranged along the first direction X. The side wall 91 has a track, the track includes: an upper track 912 and a lower track 911, the upper track 912 is above the lower track 911 in the third direction Z. The side wall 91 also has a first recess 913 and a second recess 915, the first recess 913 has a first electric contact pin 914 therein, and the second recess 915 has a second electric contact pin 916 therein.

[0092] During the installation of the developing cartridge 1 and the drum assembly 2 to the image forming device, the first chip 27 on the drum assembly 2 can contact the first electric contact pin 914 after the first chip 27 reaches the first recess 913 along the installation direction of the developing cartridge 1 and the drum assembly 2, and the second chip 31 on the developing cartridge 1 can contact the second electric contact pin 916 after the second chip 31 reaches the second recess 915 along the installation direction of the developing cartridge 1 and the drum assembly 2.

[0093] Specifically, during the installation of the developing cartridge 1 and the drum assembly 2 to the image forming device, the second chip holder 30 passes the first recess 913 along the track and reaches a position opposite to the second recess 915, while the first chip holder 26 reaches the first recess 913. At this time, the first chip holder 26 abuts against the lower track 911, the first electric contact surface on the first chip 27 contacts the first electric contact pin 914 in the first recess 913, and the image forming device recognizes the information of the drum assembly 2; the second chip 31 is in a position opposite to the second recess 915 in the third direction Z, but the second electric contact surface is still a certain distance away from the second electric contact pin 916 in the third direction Z.

[0094] More specifically, the developing cartridge 1 further comprises: a force receiving portion arranged close to the fourth end 14, the force receiving portion includes a resilient member, and further comprises: a first force receiving portion arranged at the first end 11, the first force receiving portion is used to abut against the door cover protrusion 901 of the door cover 90 to drive the developing cartridge 1 to move along the second direction Y, so that the developing roller 131 is attached to the photosensitive drum 24, and drive the developing cartridge 1 to move along the third direction Z, so that the second chip 31 contacts the second electric contact pin 916.

[0095] Preferably, the force receiving portion further comprises: a second force receiving portion arranged at the second end 12, the second force receiving portion is also used to abut against the door cover protrusion 901 of the door cover 90 to drive the developing cartridge 1 to move along the second direction Y, so that the developing roller 131 is attached to the photosensitive drum 24, and drive the developing cartridge 1 to move along the third direction Z, so that the second chip 31 contacts the second electric contact pin 916. The first force receiving portion and the second force receiving portion are symmetrically arranged along the first direction X, so that the developing cartridge 1 is uniformly stressed.

[0096] Further, in other embodiments, the force receiving portion provided at the first end 11 and the second force receiving portion provided at the second end 12 can be asymmetrically arranged, as long as the force applied to the developing cartridge 1 by the door cover 90 is symmetrical and the developing cartridge 1 can normally operate.

[0097] After the developing cartridge 1 and the drum assembly 2 are installed in the image forming apparatus, the door cover 90 can be rotated to close in the counterclockwise direction (the direction shown by WA is the clockwise direction, and the direction shown by WB is the counterclockwise direction), and the door cover protrusion 901 on the door cover 90 applies a lifting force to the developing cartridge 1 through the force receiving portion, the lifting force having a component in the third direction Z upward, so that the developing cartridge 1 moves upward relative to the drum assembly 2 in the third direction Z, and the second electrical contact surface contacts the second electrical contact pin 916.

[0098] Preferably, when the developing cartridge 1 receives the lifting force and moves relative to the drum assembly 2, the developing cartridge 1 moves in the third direction Z by a distance equal to or slightly greater than the distance between the second chip 31 and the second electrical contact pin 916 in the third direction Z, so that the second electrical contact surface can contact the second electrical contact pin 916, and at the same time, the second electrical contact surface and the second electrical contact pin 916 are not excessively contacted due to too much upward movement, thereby damaging the second electrical contact surface or the second electrical contact pin 916.

[0099] When the door cover 90 is rotated to close in the counterclockwise direction, the door cover protrusion 901 on the door cover 90 also applies a pushing force to the developing cartridge 1 through the force receiving portion, the pushing force having a component in the second direction Y forward, so that the developing roller 131 of the developing cartridge 1 is in contact with the photosensitive drum 24 of the drum assembly 2.

[0100] When the use of the developing cartridge 1 is completed and the developing cartridge 1 needs to be taken out of the image forming apparatus, the door cover 90 is rotated to open in the clockwise direction. At this time, the door cover protrusion 901 is separated from the force receiving portion, and the door cover 90 does not apply any force to the developing cartridge 1, and the developing cartridge 1 is no longer subjected to the lifting force and the pushing force, so that the developing cartridge 1 moves downward in the third direction Z by a distance, and the second electrical contact surface is separated from the second electrical contact pin 916.

[0101] Regarding the specific structure of the force receiving portion on the developing cartridge 1, the present application provides the following various embodiments.

[0102] Embodiment One

[0103] In this embodiment, the first force receiving portion includes a first pushing portion 113 and a first elastic member 114, and the second force receiving portion includes a second pushing portion 123 and a second elastic member 124.

[0104] As shown in FIG. 1, the first force receiving portion includes a first pushing portion 113 and a first elastic member 114, and the second force receiving portion includes a second pushing portion 123 and a second elastic member 124. Figure 3 and Figure 4As shown, in the present embodiment, the developing cartridge comprises a lifting portion, which comprises a first lifting portion 112 arranged at the first end 11, the first lifting portion 112 is closer to the fourth end 14 than the third end 13 in the second direction Y. The first end 11 of the developing cartridge 1 is further provided with a first pushing portion 113 and a first mounting cylinder 115, the first pushing portion 113 is closer to the fourth end 14 in the second direction Y, the first pushing portion 113 has a first rotating hole 1131, the first pushing portion 113 is rotationally connected with the cartridge body through the first rotating hole 1131, and can rotate relative to the cartridge body about an axis extending along the first direction X. One end of the first pushing portion 113 is connected with the first mounting cylinder 115, and the other end of the first pushing portion 113 can be reset through the first elastic member 114 after rotation.

[0105] As shown in Figure 19 and Figure 20 After the developing cartridge 1 and the drum assembly 2 are installed in the image forming apparatus, the door cover 90 is rotated to close in the counterclockwise direction, the door cover protrusion 901 on the door cover 90 abuts against the first lifting portion 112 to exert a first lifting force F1 on the developing cartridge 1, the first lifting force F1 has a component in the third direction Z upward, so that the developing cartridge 1 moves upward relative to the drum assembly 2 along the third direction Z, the second electrical contact surface contacts the second electrical contact pin 916, and the information of the developing cartridge 1 is recognized by the image forming apparatus.

[0106] When the door cover 90 is rotated to close in the counterclockwise direction, the door cover protrusion 901 on the door cover 90 also abuts against the first pushing portion 113 to exert a first pushing force F2 on the developing cartridge 1, the first pushing force F2 has a component in the second direction Y toward the developing roller 131, so that the first pushing portion 113 pivots about the first mounting cylinder 115 with an axis parallel to the first direction X, the first elastic member 114 is stretched, the developing cartridge 1 moves in the second direction Y toward the photosensitive drum 24, and the developing roller 131 is in close contact with the photosensitive drum 24.

[0107] When the use of the developing cartridge 1 is completed and it needs to be taken out of the image forming apparatus, the door cover 90 is rotated to open in the clockwise direction, the door cover protrusion 901 on the door cover 90 is separated from the first lifting portion 112, the first lifting portion 112 is no longer subjected to the first lifting force F1, the developing cartridge 1 moves downward along the third direction Z by a distance, so that the second electrical contact surface is separated from the second electrical contact pin 916; the door cover protrusion 901 on the door cover 90 is separated from the first pushing portion 113, the first pushing portion 113 is no longer subjected to the first pushing force F2, at this time, the first elastic member 114 contracts to drive the first pushing portion 113 to pivot, and the developing cartridge 1 returns to the state when it is just installed in the image forming apparatus with the drum assembly 2 and the door cover 90 is not closed, and the developing roller 131 is no longer in close contact with the photosensitive drum 24.

[0108] Optionally, in other embodiments, the first lifting portion 112, the first pushing portion 113, the first mounting cylinder 115 and the first elastic member 114 are arranged on the cover 111, so as to facilitate cooperation with the door cover protrusion 901 on the door cover 90.

[0109] Further, as shown in Figure 16 and Figure 17 , the lifting portion further comprises a second lifting portion 122 arranged at the second end 12, and the second lifting portion 122 is symmetrically arranged with the first lifting portion 112. Similarly, the second end is also symmetrically provided with a second pushing portion 123, a second elastic member 124 and a second mounting cylinder 125.

[0110] The first lifting portion 112 and the second lifting portion 122 can respectively abut against the two door cover protrusions 901 on the door cover 90, and the first pushing portion 113 and the second pushing portion 123 can respectively abut against the two door cover protrusions 901 on the door cover 90, that is, when the door cover 90 is rotated to close in the counterclockwise direction, the second end 12 of the cartridge body also correspondingly receives a second lifting force (not shown in the figure) and a second pushing force (not shown in the figure), so that the force received by the developing cartridge 1 is left-right symmetric, and the developing cartridge 1 will not tilt due to the left-right asymmetric lifting force, and the developing roller 131 will not deviate from the photosensitive drum 24 due to the left-right asymmetric pushing force.

[0111] Specifically, the second lifting portion 122 is integrally formed with the cartridge body, and in other embodiments, the second lifting portion 122 can also be arranged in a split manner with the cartridge body.

[0112] Further, in other embodiments, the lifting portion can be arranged only at one of the first end 11 or the second end 12 of the developing cartridge 1, that is, it is not necessary to apply symmetric lifting force when lifting the developing cartridge 1, and preferably, the pushing portion is arranged on both the first end 11 and the second end 12, and the door cover protrusion 901 applies symmetric pushing force to the developing cartridge 1, so that the developing roller 131 and the photosensitive drum 24 are in symmetric contact, preventing poor powder feeding and white printing caused by asymmetric contact.

[0113] Further, in the present embodiment, the force receiving portion comprises the pushing portion and the elastic member, and the elastic member is a compression spring, a torsion spring or a tension spring. In the present embodiment, the elastic member is preferably a torsion spring.

[0114] Further, in the present embodiment, the elastic member is indirectly pressed by the door cover protrusion 901 through the pushing portion, so that the elastic member is compressed / stretched and accumulates elastic force. In other embodiments, the elastic member abuts against the door cover protrusion 901 through the intermediate piece (the pushing portion) or directly abuts against the door cover protrusion 901, which can be considered as the elastic member being in contact with the door cover protrusion 901.

[0115] Further, in the present embodiment, in the first direction, the force receiving portion at least partially overlaps with the lifting portion.

[0116] In the present embodiment, when the door cover 90 is closed, the door cover protrusion 901 on the door cover 90 can exert a lifting force on the lifting portion, so that the second electrical contact surface is in contact with the second electrical contact pin 916, and the image forming apparatus recognizes the developing cartridge 1; and can exert a pushing force on the pushing portion, so that the developing roller 131 is in contact with the photosensitive drum 24, thereby completing the developing work. Therefore, it is not necessary to provide the pushing member on the side wall of the developing cartridge 1 and it is also not necessary to provide the force applying member for exerting the pushing force on the developing cartridge 1 on the drum assembly, which simplifies the structure of the developing cartridge 1 and reduces the manufacturing cost of the developing cartridge 1 and the drum assembly 2.

[0117] Embodiment Two

[0118] The difference between the present embodiment and Embodiment One is that the pushing portion and the lifting portion are integrally provided in the present embodiment, and the rest of the structure is similar to that of Embodiment One. In the present embodiment, the first force receiving portion includes the first pushing portion 116 and the first elastic member 117, and the second force receiving portion includes the second pushing portion 128 and the second elastic member. In the present embodiment, the first pushing portion, the second pushing portion, the first elastic member, and the second elastic member are provided in the same manner as in Embodiment One, but are provided at different positions, and therefore are distinguished from Embodiment One by using the same name with different numbers.

[0119] As shown in Figs. 1 and 2, in the present embodiment, the door cover 90 is provided with a first installation cavity 118, and the first pushing portion 116 is arranged in the first installation cavity 118. The first pushing portion 116 and the first installation cavity 118 are provided with the first elastic member 117 therebetween, and the first pushing portion 116 is movable back and forth in the first installation cavity 118. Figure 22 Figure 23 As shown in Figs. 1 and 2, in the present embodiment, the door cover 90 is provided with a first installation cavity 118, and the first pushing portion 116 is arranged in the first installation cavity 118. The first pushing portion 116 and the first installation cavity 118 are provided with the first elastic member 117 therebetween, and the first pushing portion 116 is movable back and forth in the first installation cavity 118.

[0120] The second end of the developing cartridge 1 is also provided with a second installation cavity 129, which is integrally formed with the cartridge body. The second installation cavity 129 is provided with the second pushing portion 128, and the second pushing portion 128 and the second installation cavity 129 are provided with the second elastic member (not shown in the figure) therebetween. The second pushing portion 128 is movable back and forth in the second installation cavity 129. The second installation cavity 129 and the first installation cavity 118 are symmetrically arranged in the first direction X, and the second pushing portion 128 and the first pushing portion 116 are symmetrically arranged in the first direction X.

[0121] In the present embodiment, when the first pushing portion 116 (the second pushing portion 128) is in abutment with the door cover 90, it can translate along a certain angle with the second direction and towards the fifth end 15, so that it can generate the lifting force along the third direction and the pushing force along the second direction at the same time.

[0122] ​Further, in other embodiments, the first pushing part 116, the first elastic member 117 and the first mounting cavity 118 can be arranged on the cartridge as the second end 12, that is, the first mounting cavity 118 can also be integrally formed with the cartridge.

[0123] As shown in FIG. 6, after the developing cartridge 1 and the drum assembly 2 are installed in the image forming apparatus, the door cover 90 is rotated to close in the counterclockwise direction, the door cover protrusion 901 on the door cover 90 abuts against the first force receiving protrusion 116 to exert a third force F3 on the developing cartridge 1, at this time, the first force receiving protrusion 116 moves a certain distance in the first mounting cavity 118, and the first elastic member 117 is compressed. The third force F3 has a first component F3a in the third direction Z and a second component F3b in the second direction Y, the developing cartridge 1 is moved upward in the third direction Z relative to the drum assembly 2 under the action of the first component F3a, so that the second electric contact surface contacts the second electric contact pin 916, and the information of the developing cartridge 1 is recognized by the image forming apparatus; at the same time, the developing cartridge 1 is close to the photosensitive drum 24 under the action of the second component F3b, so that the developing roller 131 is attached to the photosensitive drum 24, and the developing work is completed. Figure 24 Figure 25 Further, when the door cover 90 is rotated to close in the counterclockwise direction, the second end 12 of the cartridge is correspondingly subjected to a fourth force (not shown in the figure), the fourth force also has a component in the third direction Z and a component in the second direction Y, that is, the force acting on the second end 12 of the cartridge is exactly the same as the force acting on the first end 11 of the cartridge, so that the forces acting on the developing cartridge 1 are left-right symmetrical, the developing cartridge 1 will not tilt when being lifted due to the left-right asymmetrical lifting force, and the developing roller 131 will not be attached to the photosensitive drum 24 with deviation due to the left-right asymmetrical pushing force.

[0124] When the developing cartridge 1 is used up and needs to be taken out of the image forming apparatus, the door cover 90 is rotated to open in the clockwise direction, the door cover protrusion 901 on the door cover 90 is separated from the first pushing part 116, the first pushing part 116 is no longer subjected to the third force F3, the developing cartridge 1 is moved downward in the third direction Z by a certain distance, so that the second electric contact surface is separated from the second electric contact pin 916, and the developing roller 131 is no longer closely attached to the photosensitive drum 24. The first elastic member 117 rebounds under the action of the elastic force, and the first pushing part 116 returns to the original position under the action of the first elastic member 117. The second end 12 of the cartridge moves in the same way as the first end 11. At this time, the developing cartridge 1 and the drum assembly 2 return to the state when they are just installed in the image forming apparatus and the door cover 90 is not closed.

[0125] In the embodiment, the elastic member is a tension spring or a compression spring, and the compression spring is preferred in the embodiment.

[0126] In the embodiment, the elastic member is a tension spring or a compression spring, and the compression spring is preferred in the embodiment.

[0127] ​In the embodiment, the pushing part and the lifting part are arranged on one component, which is lifted by the door cover protrusion 901 to lift the developing cartridge 1 and make the developing roller 131 on the developing cartridge 1 adhere to the photosensitive drum 24, so that the pushing member does not need to be arranged on the sidewall of the developing cartridge 1, and the force applying member for applying the pushing force to the developing cartridge 1 does not need to be arranged on the drum assembly, the number of components of the developing cartridge 1 and the drum assembly 2 is reduced, the structure is further simplified, and the manufacturing cost of the developing cartridge 1 and the drum assembly 2 is reduced.

[0128] Embodiment Three

[0129] The difference between the embodiment and the embodiment one is that the pushing part and the lifting part are arranged in a separate mode in the embodiment, and the rest of the structure is similar to that of the embodiment one.

[0130] In the embodiment, the first force receiving part includes the first pushing part 50a and the first elastic member 52a, and the second force receiving part includes the second pushing part 50b and the second elastic member.

[0131] As shown in Figure 26 , Figure 27 and Figure 28 In the embodiment, the first end 11 of the cartridge body is provided with the first pushing part 50a, the first fixed part 51a, and the first elastic member 52a. The first fixed part 51a is integrally formed with the cartridge body, the first pushing part 50a is arranged in the first fixed part 51a, the first elastic member 52a is arranged between the first pushing part 50a and the first fixed part 51a, and the first pushing part 50a can move back and forth in the second direction Y in the first fixed part 51a.

[0132] The second end 12 of the cartridge body is provided with the second pushing part 50b, the second fixed part 51b, and the second elastic member (not shown in the figure). The second pushing part 50b, the second fixed part 51b, and the second elastic member are arranged opposite to the first pushing part 50a, the first fixed part 51a, and the first elastic member 52a arranged on the first end 11 of the cartridge body in the first direction X, and have the same structure, which will not be described in detail here.

[0133] As shown in Figure 29 and Figure 30As shown, after the developing cartridge 1 and the drum assembly 2 are installed in the image forming apparatus, the door cover 90 is rotated to close in the counterclockwise direction, and the door cover protrusion 901 on the door cover 90 simultaneously abuts against the first lifting portion 112 and the first pushing portion 50a. Specifically, the part of the door cover protrusion 901 at the upper end in the third direction Z abuts against the first lifting portion 112, so that the developing cartridge 1 is moved upward relative to the drum assembly 2 along the third direction Z, the second electrical contact surface is in contact with the second electrical contact pin 916, and the information of the developing cartridge 1 is recognized by the image forming apparatus; the part of the door cover protrusion 901 at the lower end in the third direction Z abuts against the first pushing portion 50a, so that the first pushing portion 50a is moved forward in the first fixed portion 51a along the second direction Y, the first elastic member 52a is compressed, and at the same time, the first pushing portion 50a applies the third pushing force F4 to the developing cartridge 1 along the second direction Y, so that the developing roller 131 is in close contact with the photosensitive drum 24, and the developing work is completed.

[0134] At the second end 12 of the cartridge body, when the door cover 90 is closed, the door cover protrusion 901 also abuts against the second lifting portion 122 and the second pushing portion 50b, and the abutting process is exactly the same as the above-mentioned abutting process, which will not be described in detail here.

[0135] When the developing cartridge 1 needs to be taken out of the image forming apparatus after use, the door cover 90 is rotated to open in the clockwise direction, and the door cover protrusion 901 on the door cover 90 is separated from the first lifting portion 112 and the first pushing portion 50a, so that the developing cartridge 1 is no longer subjected to the lifting force and the third pushing force F4, and the developing cartridge 1 is moved downward along the third direction Z by a distance, so that the second electrical contact surface is separated from the second electrical contact pin 916, and the developing roller 131 is no longer in close contact with the photosensitive drum 24. The first elastic member 52a rebounds under the action of the elastic force, and the first pushing portion 50a returns to the original position under the action of the first elastic member 52a. The second end 12 of the cartridge body has the same action as the first end 11. At this time, the developing cartridge 1 and the drum assembly 2 return to the state when they are just installed in the image forming apparatus and the door cover 90 is not closed.

[0136] Further, in the third direction Z, the first lifting portion 112 and the first pushing portion 50a at least partially coincide; in the second direction Y, the second electrical contact surface is located between the developing roller 131 and the first pushing portion 50a. In other embodiments, the first lifting portion 112 and the first pushing portion 50a can not coincide in the third direction Z, as long as they can abut against the door cover protrusion 901 on the door cover 90 to provide a pushing force for the developing cartridge 1, so that the developing roller 131 is in contact with the photosensitive drum 24 to complete the developing.

[0137] Further, the first pushing part 50a and the second pushing part 50b are symmetrically arranged in the first direction X to ensure that the pushing force applied by them is symmetrical. In other embodiments, the first pushing part 50a and the second pushing part 50b can be asymmetrically arranged, as long as they can respectively abut against the door cover protrusion 901 on the door cover 90 to apply a pushing force to the developing cartridge 1 in the first direction X, so that the developing roller 131 uniformly contacts the photosensitive drum 24.

[0138] In addition, in the third direction Z, the second pushing part 50b at least partially overlaps the powder filling port 127, and the second lifting part 122 at least partially overlaps the second pushing part 50b; in the second direction Y, the second pushing part 50b is located between the second lifting part 122 and the powder filling port 127. In other embodiments, in the third direction Z, the second pushing part 50b can also not overlap the powder filling port 127, as long as it can respectively abut against the door cover protrusion 901 on the door cover 90 to apply a pushing force to the developing cartridge 1 in the first direction X, so that the developing roller 131 uniformly contacts the photosensitive drum 24.

[0139] Further, in the present embodiment, in the third direction, the lifting part is located above the force receiving part, and the lifting part is closer to the fifth end 15 than the force receiving part.

[0140] In the present embodiment, the pushing force applied by the pushing part to the developing cartridge 1 causes the developing roller 131 to uniformly contact the photosensitive drum 24, and the elastic member can play a role in slowing down, effectively preventing the developing roller 131 from interfering with the photosensitive drum 24 when the pushing force is too large.

[0141] The present embodiment also provides a variant, as shown in Figure 31 、 Figure 32 and Figure 33 , on the first end 11 of the cartridge body, the first fixed part 51a can be integrally formed with the cover 111, and the first pushing part 50a is mounted on the first fixed part 51a, and the remaining positional relationship and force receiving relationship are exactly the same as in Embodiment Three, and will not be described in detail here.

[0142] By integrally forming the first fixed part 51a with the cover 111, i.e. arranging the first pushing part 50a on the cover 111, the structure of the cartridge body is further simplified, the modification to the cartridge body is reduced, the volume of the cartridge body in the first direction X is reduced, and the number of cartridge body components is reduced, further reducing the manufacturing cost of the developing cartridge 1.

[0143] Embodiment Four

[0144] Compared with Embodiment One, the force receiving part is the elastic member itself.

[0145] In the present embodiment, the first force receiving portion is the first elastic member 53a, and the second force receiving portion is the second elastic member 53b.

[0146] As shown in the figure, in the present embodiment, the first elastic member 53a is attached to the cover 111, and in the third direction Z, the first elastic member 53a is located below the first lifting portion 112, and in the second direction Y, the first elastic member 53a is located at the rear end of the second electrical contact surface. The first elastic member 53a is made of a flexible material with elasticity, such as elastic rubber, etc., and can be attached to the cover 111 by means of gluing, etc. Figure 34 As shown in the figure, in the present embodiment, the first elastic member 53a is attached to the cover 111, and in the third direction Z, the first elastic member 53a is located below the first lifting portion 112, and in the second direction Y, the first elastic member 53a is located at the rear end of the second electrical contact surface. The first elastic member 53a is made of a flexible material with elasticity, such as elastic rubber, etc., and can be attached to the cover 111 by means of gluing, etc.

[0147] Figure 35 As shown in the figure, the second end 12 of the cartridge body has a fixed protrusion 54b extending outwardly in the first direction X, and the second elastic member 53b is arranged on the fixed protrusion 54b. The first elastic member 53a and the second elastic member 53b are symmetrically arranged in the first direction X.

[0148] As shown in the figure, in the present embodiment, the first elastic member 53a is attached to the cover 111, and in the third direction Z, the first elastic member 53a is located below the first lifting portion 112, and in the second direction Y, the first elastic member 53a is located at the rear end of the second electrical contact surface. The first elastic member 53a is made of a flexible material with elasticity, such as elastic rubber, etc., and can be attached to the cover 111 by means of gluing, etc. Figure 36 When the use of the developing cartridge 1 is finished, the door cover 90 is opened by rotating in the clockwise direction, and the door cover protrusion 901 is separated from the first elastic member 53a and the second elastic member 53b. Under the action of the elastic force of the first elastic member 53a and the second elastic member 53b, the first elastic member 53a and the second elastic member 53b return to their original state.

[0149] In other embodiments, the first end 11 of the cartridge body can also be provided with a fixed protrusion, and then the first elastic member 53a is fixed on the cartridge body.

[0150] In the present embodiment, by arranging the flexible portion (the first elastic member 53a and the second elastic member 53b) with elasticity on the developing cartridge 1 and cooperating with the door cover protrusion 901 on the door cover 90, a pushing force is applied to the developing cartridge 1 to make the developing roller 131 contact the photosensitive drum 24 to complete the development, and further reduces the number of components of the developing cartridge 1 and reduces the manufacturing cost of the developing cartridge 1.

[0151] In the present embodiment, the flexible portion can be felt, rubber, or sponge, and preferably, the felt is attached to the fixed protrusion.

[0152]

[0153] ​​It can be understood that in the above embodiment, the door cover protrusion 901 on the door cover 90 and the force receiving portion are not unique in the way of abutting to apply the lifting force and the pushing force to the developing cartridge 1, and can be combined with each other, as long as they can cooperate with the door cover protrusion 901 to apply the lifting force and the pushing force to the developing cartridge 1.

[0154] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A developing cartridge, capable of being mounted together with a drum assembly having a photosensitive drum within an image forming apparatus, the image forming apparatus having a door cover, characterized in that, The developing cartridge includes: A housing for containing developer, the housing 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 developing roller is capable of rotating about an axis extending along the first direction; The second chip includes a second electrical contact surface capable of being electrically connected to a second electrical contact pin of the image forming apparatus, the second electrical contact surface being disposed at the first end; A force receiving part is used to cooperate with the door cover to make the developing roller fit against the photosensitive drum.

2. The developing cartridge according to claim 1, characterized in that, The force receiving part includes an elastic element disposed near the fourth end, and the force receiving part is capable of abutting against the door cover and moving relative to the box body.

3. The developing cartridge according to claim 2, characterized in that, The force receiving part further includes a pushing part, the elastic element connects the pushing part to the cartridge body, the pushing part abuts against the door cover protrusion on the door cover to stretch / compress the elastic element, and applies a pushing force toward the photosensitive drum to the developing cartridge.

4. The developing cartridge according to claim 3, characterized in that, The pushing part is rotatable relative to the box body.

5. The developing cartridge according to claim 4, characterized in that, When the pushing part abuts against the door cover protrusion, the pushing part swings relative to the box body toward the third end; When the push part separates from the door cover protrusion, the elastic element drives the push part to reset under the action of elastic force.

6. The developing cartridge according to claim 3, characterized in that, The pushing part is capable of translational movement relative to the box body.

7. The developing cartridge according to claim 6, characterized in that, When the pushing part abuts against the door cover protrusion, it can translate relative to the box body at an angle to the second direction and toward the fifth end, and apply a force to the box body at an angle to the second direction and toward the fifth end; The force has a component along the second direction toward the photosensitive drum, which is a thrust force; The force has a component force along a third direction toward the fifth end, which is a lifting force. Under the action of the lifting force, the box moves relative to the drum assembly along a third direction, so that the second electrical contact surface is electrically connected to the second electrical contact pin.

8. The developing cartridge according to any one of claims 1-7, characterized in that, The force receiving unit includes a first force receiving unit disposed at the first end and a second force receiving unit disposed at the second end.

9. The developing cartridge according to claim 8, characterized in that, The developing cartridge also includes a cover, which is detachably disposed at the first end, and the first force receiving part is disposed on the cover.

10. The developing cartridge according to claim 1, characterized in that, The developing cartridge also includes a lifting section that can cooperate with the door cover to drive the developing cartridge to move along the third direction, so that the second electrical contact surface is electrically connected to the second electrical contact pin.

11. The developing cartridge according to claim 10, characterized in that, In the third direction, the lifting part and the force receiving part at least partially overlap or the lifting part is located above the force receiving part.

12. The developing cartridge according to claim 11, characterized in that, The second electrical contact surface is located in the second direction between the force receiving part and the developing roller.

Images