Drum assembly

Abstract

The embodiment of the utility model relates to the technical field of electronic imaging, and discloses a drum assembly, the drum assembly is used for detachably mounting a developing box, and the drum assembly comprises a drum frame, a photosensitive drum, a drum identification assembly and a lifting assembly; the photosensitive drum extends along the first direction, is rotatably supported at two ends of the drum frame in the first direction, and is positioned in front of the drum assembly in the second direction; the drum identification assembly comprises an electric contact surface, the electric contact surface is arranged at one end of the drum frame in the first direction, and the electric contact surface is fixedly arranged relative to the drum frame; the lifting assembly can lift the drum assembly and the electrical contact surface. According to the embodiment of the invention, the electric contact of the electric contact surface of the storage medium and the identification contact of the image forming device is realized.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of electronic imaging, and particularly relate to a drum assembly. BACKGROUND

[0002] The drum assembly and the developing cartridge are installed together to form a process cartridge for installation into an image forming apparatus for printing and developing. The drum assembly includes a drum frame and a drum recognition assembly, the drum recognition assembly includes a drum support, a storage medium storing drum assembly information, and an electrical contact surface electrically connected to the storage medium. The image forming apparatus is usually provided with a recognition contact, which is used to read the information stored in the storage medium, so as to recognize the drum assembly.

[0003] In order to ensure that the recognition contact and the electrical contact surface are in stable contact, the recognition contact is usually arranged in a recess in the image forming apparatus, so that the storage medium is limited by the side wall of the recess after entering the recess, thereby ensuring that the electrical contact surface and the recognition contact are in stable contact, and avoiding poor contact. However, in order to adapt to such an image forming apparatus, a sliding rail needs to be arranged on the drum assembly so that the drum support can slide relative to the drum frame, otherwise the storage medium cannot enter the recess where the recognition contact is located, resulting in that the electrical contact surface cannot be electrically contacted with the recognition contact of the image forming apparatus and the drum assembly cannot be recognized. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, embodiments of the present application provide a drum assembly, which is lifted relative to the image forming apparatus by arranging a lifting assembly on the drum assembly, so that the electrical contact surface is electrically contacted with the recognition contact of the image forming apparatus and the drum assembly can be recognized.

[0005] According to an aspect of embodiments of the present application, a drum assembly is provided, the drum assembly is detachably installed with a developing cartridge, and the drum assembly includes a drum frame, a photosensitive drum, a drum recognition assembly, an electrical contact surface, and a lifting assembly. The photosensitive drum is rotatably supported at both ends in a first direction of the drum frame and is located in front of the drum assembly in a second direction. The drum recognition assembly includes the electrical contact surface, which is arranged at one end of the drum frame in the first direction and is fixedly arranged relative to the drum frame. The lifting assembly is capable of lifting the drum assembly and the electrical contact surface.

[0006] Optionally, the lifting assembly is an abutting piece, and the electrical contact surface and the abutting piece are arranged at the rear of the drum assembly in the second direction compared with the photosensitive drum.

[0007] Optionally, the abutting piece has an abutting inclined surface, which extends rearward in the second direction and upward in a third direction.

[0008] Optionally, the drum assembly further includes a pushing piece, and the abutting piece is located rearward of the pushing piece in the second direction.

[0009] Optionally, the drum assembly further comprises a locking member, the abutting member is located rearward of the locking member in the second direction.

[0010] Optionally, the distance from the center of the photosensitive drum to the abutting member in the second direction is greater than 140mm.

[0011] Optionally, the distance is 140-155mm or 147-155mm.

[0012] Optionally, the abutting member comprises an abutting slope, the abutting slope extends rearward in the second direction and upward in the third direction; the distance is the distance from the center of the photosensitive drum to the abutting slope in the second direction.

[0013] Optionally, the drum frame further comprises a first side wall, a second side wall and a third side wall, the third side wall connects the first side wall and the second side wall, the photosensitive drum is supported between the first side wall and the second side wall; the electrical contact surface is arranged on the first side wall; the abutting member is closer to the first side wall than to the second side wall in the second direction.

[0014] Optionally, the abutting member is arranged on the first side wall.

[0015] Optionally, two abutting members are arranged, one abutting member is arranged close to the first side wall, and the other abutting member is arranged close to the second side wall.

[0016] Optionally, the abutting member is an integral part of the drum frame, or the abutting member is fixedly mounted on the drum frame.

[0017] Optionally, the abutting member can receive the force of the door cover of the image forming device.

[0018] Optionally, the lifting assembly is an elastic assembly.

[0019] Optionally, the electrical contact surface is located rearward of the photosensitive drum in the second direction; the elastic assembly is arranged on the bottom wall of the drum frame in the third direction, and the elastic assembly is arranged rearward of the photosensitive drum in the second direction.

[0020] Optionally, the elastic assembly comprises an elastic member and an abutting member, the elastic member is abutted between the drum frame and the abutting member, and the elastic member extends forward in the second direction and upward in the third direction.

[0021] Optionally, the bottom wall of the drum frame comprises a mounting portion, the mounting portion comprises a first mounting cavity recessed forward in the second direction and upward in the third direction, one end of the elastic member is abutted to the first mounting cavity, and the other end of the elastic member is abutted to the abutting member.

[0022] Optionally, a side wall of the first mounting cavity has a first sliding portion, the first sliding portion extends forward in the second direction and upward in the third direction, the abutting member has a second sliding portion, and the second sliding portion is slidably connected with the first sliding portion.

[0023] Optionally, one of the first sliding part and the second sliding part is a sliding protrusion, and the other is a sliding recess.

[0024] Optionally, the side wall of the first mounting cavity has a first clamping part, and the abutting piece has a second clamping part capable of clamping with the first clamping part.

[0025] Optionally, the second clamping part has two, and the second clamping parts are respectively located on the two sides of the side wall of the abutting piece in the first direction, and the second sliding part is located at the rear side of the abutting piece in the second direction.

[0026] Optionally, the drum assembly further comprises a second cartridge body and a cleaning piece extending in the first direction, the cleaning piece being in contact with the photosensitive drum; the second cartridge body has a first sub-cartridge body and a second sub-cartridge body communicating in a third direction, the front wall of the first sub-cartridge body being located in front of the front wall of the second sub-cartridge body in the second direction, and the first sub-cartridge body being located above the second sub-cartridge body.

[0027] Optionally, the internal volume of the second cartridge body is 40000-70000mm 3 or 53000-70000mm 3 or 58000-70000mm 3 or 58000-62000mm 3 .

[0028] Optionally, the length dimension of the second cartridge body in the first direction is 234-240mm, and the height dimension of the second cartridge body in the third direction is 25mm-33mm or 28-33mm.

[0029] Optionally, the second sub-cartridge body is cuboid-shaped, the length dimension of the second sub-cartridge body in the first direction is 170-225mm, the width dimension of the second sub-cartridge body in the second direction is 5-15mm, and the height dimension of the second sub-cartridge body in the third direction is 1-15mm.

[0030] Optionally, the length dimension of the second sub-cartridge body is 220-225mm, the width dimension of the second sub-cartridge body is 10-15mm, and the height dimension of the second sub-cartridge body is 10-15mm.

[0031] Optionally, the internal volume of the second sub-cartridge body is 10000-25000mm 3 or 15000-25000mm 3 or 20000-25000mm 3 or 22000-25000mm 3 .

[0032] Optionally, the drum assembly further comprises a cartridge body shell, the shape of the cartridge body shell is matched with the shape of the second cartridge body, and the cartridge body shell is used for accommodating and supporting the second cartridge body; the height dimension of the cartridge body shell in the third direction is 25mm-33mm.

[0033] Optionally, the cartridge body shell comprises a first cartridge body shell and a second cartridge body shell, the first cartridge body shell is located above the second cartridge body shell; the second cartridge body shell has a length dimension of 170-225mm in the first direction, a width dimension of 5-15mm in the second direction, and a height dimension of 2-18mm in the third direction.

[0034] Optionally, the front wall of the second cartridge body is in a slope shape, the front wall of the first sub-cartridge body and the front wall of the second sub-cartridge body both extend forward in the second direction and upward in the third direction, and the front wall of the first sub-cartridge body is located in front of the front wall of the second sub-cartridge body in the second direction.

[0035] The above description is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0036] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Furthermore, the same reference numerals are used throughout the several views that follow. In the drawings:

[0037] Figure 1 and Figure 2 shows the structural schematic diagram of the drum assembly and the partial structural enlarged schematic diagram of the drum assembly provided by embodiment one,

[0038] Figure 1a shows the structural schematic diagram of the storage medium and the electrical contact surface in the drum assembly provided by embodiment one,

[0039] Figure 3 shows Figure 2 the exploded structural schematic diagram of the elastic assembly in the drum assembly provided by embodiment one and the partial enlarged structural schematic diagram of the elastic assembly,

[0040] Figure 4 shows the structural schematic diagram of the drum assembly without the abutting member provided by embodiment one,

[0041] Figure 5 shows the structural schematic diagram of the abutting member of the drum assembly provided by embodiment one,

[0042] Figure 6 shows the structural schematic diagram of the drum assembly without the elastic assembly provided by embodiment one,

[0043] Figure 7A structural diagram showing a side wall of a cavity of an image forming apparatus,

[0044] Figure 8 A structural diagram showing a bottom view of the drum assembly provided with two sets of elastic assemblies according to Embodiment One,

[0045] Figure 9 A structural diagram showing Figure 8 A structural diagram showing another view of the drum assembly provided,

[0046] Figure 10 A structural diagram showing another view of the drum assembly provided with two sets of elastic assemblies according to Embodiment One,

[0047] Figure 11 A structural diagram showing the drum assembly provided according to Embodiment Two,

[0048] Figure 12 A structural diagram showing a cross-sectional view of the drum assembly provided according to Embodiment Two,

[0049] Figures 13 to 15 A structural diagram showing an exploded view of the drum assembly and part of the structure provided according to Embodiment Two, Figure 16 A structural diagram showing part of the structure in the drum assembly provided according to Embodiment Two,

[0050] Figure 17 A structural diagram showing a cross-sectional view of part of the structure in the drum assembly provided according to Embodiment Two,

[0051] Figure 18 A structural diagram showing a side view of the cartridge body of the drum assembly provided according to Embodiment Two,

[0052] Figure 19 A structural diagram showing a top view of the cartridge body of the drum assembly provided according to Embodiment Two,

[0053] Figure 20 A structural diagram showing a rear view of the cartridge body of the drum assembly provided according to Embodiment Two,

[0054] Figure 21 A structural diagram showing a rear view of the drum frame in the drum assembly provided according to Embodiment Two,

[0055] Figure 22 A structural diagram showing a bottom view of the drum frame in the drum assembly provided according to Embodiment Two,

[0056] Figure 23 A structural diagram showing a drum assembly provided according to Embodiment Three with a developing cartridge and the drum assembly cooperating with a door cover of an image forming apparatus,

[0057] Figure 24 A structural diagram showing Figure 23An exploded structural schematic diagram of the drum assembly in the embodiment three,

[0058] Figure 25 A side view projection structural schematic diagram showing the drum assembly provided by the embodiment three cooperating with the door cover of the image forming device,

[0059] Figure 26 A perspective structural schematic diagram showing the drum assembly provided by the embodiment three,

[0060] Figure 27 An exploded structural schematic diagram showing the drum recognition assembly in the drum assembly provided by the embodiment three,

[0061] Figure 28 And Figure 29 A perspective structural schematic diagram showing the drum assembly provided by the embodiment three,

[0062] Figure 30 A structural schematic diagram showing the front wall of the second cartridge body in the drum assembly provided by the embodiment three,

[0063] Figure 31 A side view projection structural schematic diagram showing the drum assembly provided by the embodiment three. DETAILED DESCRIPTION

[0064] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0066] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0067] Reference to "an embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment.

[0068] In the description of the embodiments of the application, the term "and / or" is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing, A and B existing, and B existing. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0069] In the description of the embodiments of the application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0070] In the description of the embodiments of the application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the application.

[0071] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing", and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0072] Embodiment one:

[0073] Please refer to Figures 1 to 8 The application provides a drum assembly, the drum assembly has a first direction, a second direction and a third direction which intersect with each other, in order to facilitate description, the first direction is taken as an example in left-right direction, the second direction is taken as an example in front-rear direction, and the third direction is taken as an example in up-down direction. The first direction, the second direction and the third direction are preferably perpendicular to each other.

[0074] The drum assembly comprises a drum frame 10 and a drum identification assembly 50. The drum frame has a first side wall 11 and a second side wall 12, the first side wall 11 and the second side wall 12 are opposite in a first direction, a third side wall 16 is connected between the first side wall 11 and the second side wall 12, a first accommodating cavity 13 and a second accommodating cavity 14 are formed between the first side wall 11, the second side wall 12 and the third side wall 16, the first accommodating cavity is used to accommodate a photosensitive drum extending in the first direction and rotating around an axis of rotation extending in the first direction, the second accommodating cavity is used to accommodate a developing cartridge, the first accommodating cavity 13 is in front of the second accommodating cavity 14 in a second direction. The drum assembly and the developing cartridge are installed together to form a process cartridge. The photosensitive drum is used to receive the developer on the developing roller of the developing cartridge. The drum identification assembly is provided on the first side wall 11, and the drum identification assembly comprises a drum support 51, a storage medium 512 and an electrical contact surface 513 electrically connected to the storage medium 512. The drum support is fixedly installed on the first side wall 11 or integrally formed with the first side wall 11, and the drum support 51 forms an identification recess 511. The storage medium 512 is used to store information of the drum assembly, and the storage medium 512 can be a chip in particular, and the storage medium 512 is fixedly installed in the identification recess of the drum support. The electrical contact surface 513 is used to be electrically contacted with an identification contact of an image forming apparatus, so that the image forming apparatus is contacted with the drum assembly, and the electrical contact surface 513 can be a terminal on the chip, and the terminal is fixed on the chip. The electrical contact surface 513 can also be located on an electrical contact piece, and the electrical contact piece is installed on the drum support, the electrical contact piece is conductive, and the electrical contact surface 513 is electrically connected with the chip through the electrical contact piece. In some embodiments, the storage medium 512 can also not be provided on the drum identification assembly, but can be provided on the drum frame or the developing cartridge, and the electrical contact surface 513 can also be electrically connected with the storage medium 512 through the electrical contact piece. The electrical contact surface 513 is fixed or movable relative to the drum frame. The electrical contact surface 513 is fixed relative to the drum frame, and the setting mode is simple.

[0075] The drum frame is provided with an elastic assembly for cooperating with the image forming device to lift the drum assembly so that the electrical contact surface 513 of the drum recognition assembly is electrically connected with the recognition contact of the image forming device, thereby the drum assembly is recognized by the image forming device. The elastic assembly is arranged on the third side wall, i.e. the bottom wall of the drum frame, and is located at the rear of the drum assembly relative to the photosensitive drum in the second direction. The elastic assembly comprises an elastic piece 22 and an abutting piece 23. The third side wall is integrally formed with a mounting portion 20, the mounting portion 20 comprises a first mounting cavity 21 recessed forward in the second direction and upward in the third direction, the elastic piece 22 extends forward and upward, one end of the elastic piece 22 abuts against the first mounting cavity 21, and the other end of the elastic piece 22 abuts against the abutting piece 23, the elastic piece can be elastically deformed, and is preferably a spring, and the elastic piece can also be other structures or materials capable of being elastically deformed, such as a plastic piece capable of being elastically deformed, and the abutting piece 23 is used for abutting against the bottom wall in the cavity of the image forming device for accommodating the process cartridge. The side wall of the first mounting cavity 21 has a first sliding portion 211 and a first clamping portion 212, the first sliding portion 211 extends forward in the second direction and upward in the third direction, the abutting piece 23 has a second sliding portion 231 and a second clamping portion 232, the second sliding portion 231 is in sliding connection with the first sliding portion 221 to enable the abutting piece 23 to stably move relative to the mounting portion 20 or the drum frame 10 in the second direction and the third direction along the extension directions of the first sliding portion and the second sliding portion, and the second clamping portion 232 is in clamping connection with the first clamping portion 232 to prevent the abutting piece 23 from moving backward in the second direction and downward in the third direction relative to the mounting portion 20 or the drum frame 10 and from being separated from the mounting portion 20.

[0076] Referring to Figures 2 to 6 , the first sliding portion 211 is specifically a sliding protrusion, and the second sliding portion 231 is specifically a sliding recess, and the sliding protrusion is located in the sliding recess. The specific structures of the first sliding portion 211 and the second sliding portion 231 can also be interchanged. The first clamping portion 212 is specifically a protrusion, and the protrusion protrudes outward from the side wall of the mounting cavity in the second direction and the third direction, and the second clamping portion 232 is specifically a clamping hook, and the clamping hook protrudes outward from the side wall of the abutting piece 23 in front, and when the abutting piece 23 moves backward and downward, a recess cavity formed on the clamping hook cooperates with the protrusion, so that the second clamping portion 232 cooperates more tightly with the first clamping portion 212, thereby effectively preventing the abutting piece 23 from being separated from the mounting portion 20. In some embodiments, the surfaces cooperating with each other of the first clamping portion 212 and the second clamping portion 232 are flat surfaces. The left side and the right side of the side wall of the first mounting cavity 21 are each formed with a protrusion, and the left side and the right side of the side wall of the abutting piece 23 are each formed with a clamping hook, and a plurality of clamping hooks and protrusions cooperate, thereby more effectively preventing the abutting piece 23 from being separated from the mounting portion 20. The second clamping portion 232 can be elastically deformed, thereby facilitating the abutting piece 23 to be mounted in the mounting portion 20 through the first mounting cavity 21.

[0077] As Figure 5As shown in the figure, the front upper side of the mounting portion 20 is formed with a second mounting cavity 230, so that the other end of the elastic member is also accommodated in the second mounting cavity 230, which can effectively prevent the elastic member from deforming in the non-preferred direction, so that the elastic member 22 can effectively expand and contract in the second direction and the third direction. Two second clamping portions 232 are respectively located on the left side and the right side of the side wall of the abutting member 23 in the first direction, and the second sliding portion 231 is located on the rear side of the abutting member 23, which facilitates the layout of the overall structure of the abutting member 23. The front side of the side wall of the abutting member 23 is also formed with a slope 233 (see Figure 3 ), which extends forward and upward, and the slope 233 cooperates with the bottom wall of the cavity of the image forming device, so that when the process cartridge is installed into the image forming device along the cavity of the image forming device from the rear to the front, the slope of the abutting member 23 of the drum assembly can avoid the abutting member 23 being stuck with the uneven bottom wall of the cavity, and the slope 233 of the abutting member 23 can receive the upward force provided by the bottom wall, so that the process cartridge can be smoothly installed into the image forming device. The second mounting cavity 230 has a limiting portion 2301 for cooperating with the other end of the elastic member 22 to prevent the elastic member 22 from being deviated. The limiting portion 2301 is a protruding structure in the shape of a cross, and the limiting portion 2301 can also be in other shapes such as a columnar shape. The limiting portion 2301 can also be a concave structure.

[0078] When assembling the elastic assembly, first, the elastic member is installed into the mounting portion 20, and then the second sliding portion 231 of the abutting member 23 is cooperated with the first sliding portion 211 of the mounting portion 20 from below, and the second clamping portion 232 is forced to deform towards the inside of the abutting member 23, so that the abutting member 23 is installed in the first mounting cavity 21. The upper side of the mounting portion 20 is formed with an opening 201, which facilitates the adjustment of the elastic member 22 from the upper side of the mounting portion.

[0079] Please refer to Figure 7 , the identification contact is located on the guide rail 91 of the side wall, and the rear side of the identification contact 912 has a downward protrusion 911, and when the process cartridge is installed into the image forming device from the rear to the front, the drum identification assembly on the drum assembly needs to pass through the protrusion 911, and then the electrical contact surface 513 can be in contact and electrically connected with the identification contact 912.

[0080] The embodiment sets the elastic assembly at the bottom of the third wall 16 of the drum assembly, so that during the process of loading the process cartridge into the image forming apparatus, the abutting member 23 abuts against the bottom wall in the cavity, when the drum assembly moves to the drum support 51, the storage medium 512 or the electrical contact surface 513 in the drum recognition assembly abuts against the protrusion 911, the drum assembly is subjected to a downward force, the mounting portion 20 of the drum assembly compresses the elastic member 22, so that the drum frame 10 and the drum recognition assembly rotate downward around the front end of the drum assembly in the second direction and avoid the protrusion 911, after the drum recognition assembly passes the protrusion 911, the rear end of the drum frame 10 in the second direction rotates upward under the elastic force recovery of the elastic member 22, the drum recognition assembly on the drum frame 10 also rotates upward, so that the electrical contact surface 513 is in electrical contact with the recognition contact in front of and above the protrusion 911, and the image forming apparatus reads and recognizes the information stored in the storage medium 512.

[0081] The drum recognition assembly of the embodiment is fixedly arranged relative to the drum frame, the drum support, the storage medium 512 and the electrical contact surface 513 are fixedly arranged relative to the drum frame 10, in some embodiments, the drum support, the storage medium 512 and the electrical contact surface 513 are movably arranged relative to the drum frame 10, the same effect can also be achieved by setting the elastic assembly. The elastic assembly of the embodiment is arranged at a position substantially in the middle of the third side wall 16 in the first direction. The third side wall 16 is provided with a handle 141 for gripping the drum assembly behind in the second direction, and the elastic assembly is arranged at the handle 141. Please refer to Figures 8 to 10 , the elastic assembly can also be provided with a plurality of elastic assemblies, two elastic assemblies are symmetrically arranged at the bottom of the third side wall 16, so that the support and lifting effect of the elastic assembly on the drum frame is more stable, so that the electrical contact surface 513 can reliably maintain electrical connection with the recognition contact 912. The drum assembly is provided with a pushing member 201, which is used to provide a forward pushing force to the developing cartridge to move the developing roller forward to contact the photosensitive drum, so that the photosensitive drum can receive the developer on the developing roller. One pushing member 201 is arranged at a position close to the first side wall 11, and the other pushing member 201 is arranged at a position close to the second side wall 12, as shown in Figure 10 , a set of elastic assemblies are arranged at the rear side of the pushing member 201 close to the first side wall 11, and another set of elastic assemblies are arranged at the rear side of the pushing member 201 close to the second side wall 12, so that the structure at the rear side of the pushing member 201 is more compact, and the large-size developing cartridge is loaded into the position between the two pushing members and the two elastic assemblies on the third side wall. The lifting assembly includes the elastic assembly.

[0082] Embodiment two:

[0083] Please refer to Figures 11 to 22The drum assembly of the present embodiment is different from that of the first embodiment in that the drum assembly is provided with a waste powder bin with increased capacity, which can prevent the waste powder from overflowing or reduce the waste powder overflow. It should be noted that the drum assembly of the present embodiment is also provided with the elastic assembly (not shown in the figure) of the first embodiment. The following mainly describes the differences between the structure of the present embodiment and that of the first embodiment, and the same structure as that of the first embodiment will not be described repeatedly.

[0084] The drum assembly further includes a transfer roller 37, a photosensitive drum 31, a charging member 32, a transfer roller 33, a first cleaning roller 34, a second cleaning roller 35, and a discharge member 36, which all extend in the first direction. The photosensitive drum 31, the transfer roller 33, the first cleaning roller 34, the second cleaning roller 35, and the transfer roller 37 all rotate about a rotation axis extending in the first direction. The transfer roller 37 is configured to transfer a sheet (e.g., a paper sheet) to the photosensitive drum 31. The photosensitive drum 31 is configured to receive a developer from a developer roller of a developing cartridge. The charging member 32 is configured to charge the photosensitive drum 31, and the charging member 32 is spaced apart from the photosensitive drum 31. The transfer roller 33 is configured to transfer toner on the photosensitive drum 31 to the sheet. The transfer roller 33 is in contact with the photosensitive drum 31. The transfer roller 33 is located below the photosensitive drum 31 in a third direction, and the transfer roller 33 and the photosensitive drum 31 have a gap therebetween to allow the sheet to pass through. The photosensitive drum 31 is located between the charging member 32 and the transfer roller 33 in the third direction. The first cleaning roller 34 is configured to remove excess developer, i.e., waste powder, deposited on the photosensitive drum 42, and the first cleaning roller 34 is in contact with the photosensitive drum 42. The second cleaning roller 35 is configured to remove the developer deposited on the first cleaning roller 34, and the second cleaning roller 35 is in contact with the first cleaning roller 34. The discharge member 36 receives a light source and is configured to discharge the first cleaning roller 34 and the photosensitive drum 31. The photosensitive drum 31, the charging member 32, the transfer roller 33, the first cleaning roller 34, the second cleaning roller 35, and the discharge member 36 are disposed in the first accommodating cavity 13. The first accommodating cavity 13 further includes a waste powder bin 130, which accommodates the first cleaning roller 34 and the second cleaning roller 35, and the waste powder bin 130 is configured to collect the waste powder falling from the first cleaning roller 34 and the second cleaning roller 35.

[0085] The drum assembly includes a transmission assembly, which includes a driving head 61, an idler 62, a second gear 65, a first gear 64, and a third gear 63, which are sequentially engaged. The driving head 61 is configured to receive a driving force of the image forming device, and the driving head 61 is connected to one end of the photosensitive drum 31. From the first side wall 11 in the first direction, the driving head 61 drives the photosensitive drum 31 to rotate in the first direction. The idler 62 is configured to receive the driving force of the image forming device, and the idler 62 is connected to the other end of the photosensitive drum 31. From the first side wall 11 in the first direction, the idler 62 drives the photosensitive drum 31 to rotate in the first direction. The second gear 65 is configured to receive the driving force of the image forming device, and the second gear 65 is connected to the first gear 64. From the first side wall 11 in the first direction, the second gear 65 drives the first gear 64 to rotate in the first direction. The first gear 64 is configured to receive the driving force of the image forming device, and the first gear 64 is connected to the third gear 63. From the first side wall 11 in the first direction, the first gear 64 drives the third gear 63 to rotate in the first direction. The third gear 63 is configured to receive the driving force of the image forming device, and the third gear 63 is connected to the idler 62. From the first side wall 11 in the first direction, the third gear 63 drives the idler 62 to rotate in the first direction. Figure 13The arrow direction shown rotates clockwise. The idler 62 is connected to one end of the second cleaning roller 35, the idler 62 is engaged with the driving head 61 and the second gear 65 respectively, the idler 62 receives the driving force transmitted by the driving head 61 and drives the second gear 65 to rotate in the clockwise direction, and the second gear 65 rotates in the clockwise direction together with the second cleaning roller 35. The second gear 65 includes an outer gear and an inner gear rotating coaxially, the inner gear is closer to the inner side of the waste powder bin 130 than the outer gear, the inner gear is engaged with the first cleaning roller 34, and the inner gear drives the first gear 64 to rotate in the counterclockwise direction. The first gear 64 is connected to one end of the first cleaning roller 34 and rotates in the counterclockwise direction together with the first cleaning roller 34. The third gear 63 is engaged with the driving head 61 to drive the transfer roller 33 to rotate. The drum assembly further includes a cover 60 covering at least a part of the transmission assembly, and the cover 60 is used to protect the transmission assembly. The cover 60 is provided with a first through hole 601, the first side wall 11 is provided with a second through hole 1101, and the photosensitive drum 31 includes a shaft roller 311 and a roller body 312 wrapping the outer periphery of the shaft roller 311. The shaft roller 311 protrudes outwardly from the roller body 312 in the first direction, one end of the shaft roller 311 is supported by the first through hole 601 and the second through hole 1101, and protrudes outwardly from the first side wall 11 to facilitate the conductive of the photosensitive drum 31. The side of the cover 60 facing the transmission assembly is provided with a plurality of support shafts for supporting the positions of the rotation centers of the first gear 64 and the second gear 65.

[0086] The waste powder bin 130 includes a bin body 1301 and a cover body 1302, the bin body 1301 includes a first bin body 131 and a second bin body 132, the first bin body 131 and the second bin body 132 are integrally formed, and the cover body 1302 covers the first bin body 131 and the second bin body 132.

[0087] The first cartridge 131 has opposite first and second ends 1311 and 1312 in the first direction, and the first cleaning roller 34 is accommodated in the first cartridge 131, and both ends of the first cleaning roller 34 are rotatably supported by the first and second ends 1311 and 1312. Specifically, the first cartridge 131 further includes first bearings 1310 respectively arranged at the first and second ends 1311 and 1312, and the first cleaning roller 34 includes a roller shaft 341 and a roller body 342 wrapping the roller shaft 341, both ends of the roller shaft 341 protruding outwardly from the roller body 342 in the first direction, and both ends of the roller shaft 341 are rotatably supported by the first and second ends 1311 and 1312, and the first cleaning roller 34 is located in front of the photosensitive drum 31 in the second direction. The first cartridge 131 is integrally formed with a support portion 134 for supporting the charge-eliminating member 36, the charge-eliminating member 36 is located below the first cleaning roller 34 in the third direction and in front of the photosensitive drum 31 in the second direction, the projection of the charge-eliminating member 36 in the third direction overlaps the projection of the first cleaning roller 34, and the projection of the charge-eliminating member 36 in the second direction overlaps the projection of the photosensitive drum 31. The first cartridge 131 further includes a first mounting portion 135 having a mounting inclined surface with a front end higher than a rear end, and a receiving groove 136, the mounting inclined surface is used for mounting a first blade (not shown in the figure), the rear end of the first blade is attached to the mounting inclined surface, the front end of the first blade is in front of the mounting inclined surface in the second direction and above the mounting inclined surface in the third direction, and the front end of the first blade is in contact with the first cleaning roller 34 to make the waste powder on the first cleaning roller 34 fall into the space between the rear wall 1324 of the second cartridge and the first blade, i.e. the receiving groove 136, the first blade is preferably made of a material with a certain hardness, and the first blade 135 is located between the first cleaning roller 34 and the charge-eliminating member 36. Figure 17 The rear wall 1324 of the second cartridge and the first blade also form a receiving groove 136, and the first blade is preferably made of a material with a certain hardness, and the first blade 135 is located between the first cleaning roller 34 and the charge-eliminating member 36.

[0088] The second housing 132 has opposite third and fourth ends 1321 and 1322 in the first direction, and the second cleaning roller 35 is partially accommodated in the second housing 132, and both ends of the second cleaning roller 35 are rotatably supported by the third and fourth ends 1321 and 1322. Specifically, the second housing 132 further includes second bearings 1320 arranged at the third and fourth ends 1321 and 1322, respectively, and the second cleaning roller 35 includes a roller shaft 351 and a roller body 352 wrapping the roller shaft 351, both ends of the roller shaft 351 protruding outward from the roller body 352 in the first direction, and both ends of the roller shaft 351 are rotatably supported by the third and fourth ends 1321 and 1322. The second cleaning roller 35 is located in front of the first cleaning roller 34 in the second direction. The second housing 132 further includes a front wall 1323, a rear wall 1324, and a bottom wall 1326, and a projection of the second cleaning roller 35 in the third direction overlaps the rear wall 1324, and the second cleaning roller 35 is partially located in the first housing 131 and partially located in the second housing 132, and specifically, a projection of the second bearings 1320 in the third direction overlaps the rear wall 1324. The rear wall 1324 has a mounting inclined surface 13241, the front end of which is closer to the front and upper than the rear end, for mounting a second scraping blade (not shown in the figure), the rear end of the second scraping blade is attached to the mounting inclined surface 13241, and the front end of the second scraping blade is closer to the front in the second direction and closer to the upper in the third direction than the mounting inclined surface 13241, the second scraping blade is in contact with the second cleaning roller 35 to make the waste powder on the second cleaning roller 35 fall into the first housing 131. The second scraping blade is preferably made of soft material, the second scraping blade is in contact with the second cleaning roller 35 at a position close to the middle in the second direction, and the front end of the second scraping blade deforms downward toward the first housing 131, facilitating the waste powder on the second cleaning roller 35 to fall into the first housing 131. The rear wall 1324 of the second housing 132 is the front wall of the first housing 131, a projection of the first cleaning roller 34 in the second direction at least partially overlaps the rear wall 1324 of the second housing 132, and a projection of the first cleaning roller 34 in the second direction at least partially overlaps the second cleaning roller 35, so that the rear wall 1324 of the second housing extends upward in the third direction by a certain distance, increasing the amount of waste powder accommodated in the first housing 131. The cleaning roller includes the first cleaning roller and / or the second cleaning roller.

[0089] The cover body 1302 and the cartridge body 1301 are provided with snap-fit structures 1303, and the cover body 1302 and the cartridge body 1301 are connected through the snap-fit structures. The cover body 1302 covers the second cleaning roller 35 and the part of the first cleaning roller 34 in contact with the second cleaning roller 35, so as to reduce the waste powder generated by the part of the first cleaning roller 34 in contact with the second cleaning roller 35 from flying upwards. The front end of the cover body 1302 is provided with a mounting protrusion 1304, the front end of the second cartridge body 132 is provided with a mounting groove 13231, and the mounting protrusion 1304 is matched with the mounting groove 13231, so as to reduce the waste powder in the second cartridge body 132 from flying out. Since the second cleaning roller 35 is close to the position where the second cartridge body 132 and the cover body 1302 are matched in the second direction, the shielding piece 137 is arranged in the first cartridge body 131, the shielding piece 137 is between the position where the second cartridge body 132 and the cover body 1302 are matched and the second cleaning roller 35 in the second direction, and the lower end 1371 of the shielding piece 137 is lower than the position where the mounting protrusion 1304 and the groove 13231 are matched in the third direction, so as to prevent the waste powder on the second cleaning roller 34 from directly flying to the position where the mounting protrusion 1304 and the mounting groove 13231 are matched, thereby reducing the waste powder from overflowing. The cover body 1302 is provided with a mounting groove 13021 facing the second cartridge body, and the mounting groove 13021 contains a sealing piece (not shown in the figure), which can be made of sponge, rubber or other materials. The sealing piece is in abutment with the upper part of the shielding piece 137 in a bent shape, so as to prevent the waste powder of the part of the second cleaning roller 35 in contact with the first cleaning roller 34 from directly flying to the position where the mounting protrusion 1304 and the mounting groove 13231 are matched through the gap between the shielding piece 137 and the cover body 1302. The shielding piece 137 is provided with mounting holes 1372 at both ends, and the outer sides of the third end 1321 and the fourth end 1322 are provided with matching protrusions 13211. The shielding piece 137 is fixed to the second cartridge body 132 through the mounting holes 1372 and the matching protrusions 1372.

[0090] Since the capacity of the second cartridge body 132 is limited, when the developing cartridge uses a developing agent with low use cost and easy to generate waste powder, and the drum assembly is matched with the developing agent, the waste powder collected in the second cartridge body 132 is easy to burst out of the second cartridge body 132 when the developing agent in the developing cartridge is consumed or when multiple developing cartridges are used in sequence with the same drum assembly, thereby causing the waste powder to overflow from the second cartridge body 132.

[0091] Please refer to Figure 15, the second cartridge body 132 comprises a first sub-cartridge body 138 and a second sub-cartridge body 139 which are communicated in the third direction, the first sub-cartridge body 138 is located above the second sub-cartridge body 139, and the front wall 1383 of the first sub-cartridge body is located in front of the front wall 1393 of the second sub-cartridge body in the second direction, on the one hand, the capacity of the second cartridge body 132 is increased, on the other hand, when the drum assembly is moved downward by the abutment of the protrusion of the image forming device and the drum assembly is lifted by the rotation of the front end of the drum assembly upward under the restoring force of the elastic member, the front wall 1393 of the second sub-cartridge body can avoid the structure in the image forming device. The bottom wall of the second sub-cartridge body 139 is the bottom wall 1326 of the second cartridge body, and the front wall 1323 of the second cartridge body comprises the front wall 1383 of the first sub-cartridge body and the front wall 1393 of the second sub-cartridge body.

[0092] Please refer to Figures 18 to 20 , the second sub-cartridge body 139 is in the shape of a cuboid, the length dimension L1 of the second sub-cartridge body 139 in the first direction is 170-225mm, the width dimension W1 in the second direction is 5-15mm, and the height dimension H1 in the third direction is 1-15mm, which increases the capacity of the second sub-cartridge body 139 and the second cartridge body 132 to accommodate waste powder, reduces the possibility of waste powder explosion in the second sub-cartridge body 139, and also reduces the possibility of waste powder overflowing from the cooperation between the cover body 1302 and the cartridge body 1301, thereby improving the cleanliness of the outer surface of the drum assembly. The length dimension L1 of the second sub-cartridge body 139 is preferably 220mm, the width dimension W1 is preferably 10mm, and the height dimension H1 is preferably 10mm. The length dimension L2 of the second cartridge body 132 is 234-240mm, and the height dimension H2 is 25-33mm, the length dimension L2 is preferably 237mm, and the height dimension H2 is preferably 29mm.

[0093] Please refer to Figure 13The drum frame further comprises a cartridge housing 140 integrally formed with the drum frame, the cartridge housing 140 is used to accommodate the second cartridge 132, and the cartridge housing 140 supports the second cartridge 132. An elastic member 150 is arranged between the cartridge housing 140 and the second cartridge 132, the elastic member 150 extends in the second direction, one end of the elastic member 150 is in abutment with the cartridge housing 140 and the other end is in abutment with the second cartridge 132, the elastic member 150 is located at both ends of the second cartridge 132 in the first direction, and the elastic member 150 is used to provide an elastic force to the second cartridge 132, so that the second cartridge 132 can move relative to the cartridge housing 140 in the second direction, thereby meeting the requirement that the first cleaning roller can also contact the photosensitive drum and the second cleaning roller when the first cleaning roller and the second cleaning roller have production size deviations, reducing the cost, on the other hand, the cartridge housing 140 also plays a limiting role on the second cartridge 132 in the second direction, ensuring the structural stability of the second cartridge 132. Specifically, the other end of the elastic member 150 is in abutment with the second bearing 1320 of the second cartridge 132, and the first bearing 1310 and the second bearing 1320 are preferably an integral structure.

[0094] Please refer to Figure 13 、 Figure 21 and Figure 22 The shape of the cartridge housing 140 is adapted to the shape of the second cartridge 132, and the cartridge housing 140 comprises a first cartridge housing 141 and a second cartridge housing 142, the first cartridge housing 141 is located above the second cartridge housing 142, the second cartridge housing 142 has a cuboid shape, the length dimension L3 of the second cartridge housing 142 is 170-225 mm, the width dimension W3 is 5-15 mm, and the height dimension H3 is 2-18 mm. The length dimension L3 of the second cartridge housing 142 is preferably 220 mm, the width dimension W3 is preferably 10 mm, and the height dimension H3 is preferably 15 mm. The cartridge housing 140 provided in the embodiment can prevent the sheet-shaped from being blocked from moving forward between the photosensitive drum 31 and the transfer roller 33 due to the excessive height dimension in the third direction, thereby meeting the requirements of large-capacity waste powder cartridge and sheet transmission. In the embodiment, the cartridge housing 140 and the second cartridge are a split structure, and in some embodiments, the cartridge housing 140 and the second cartridge 132 can also be an integral structure, and the size of the cartridge housing 140 is the size of the second cartridge 132.

[0095] The internal volume of the second sub-cartridge 139 is selected to be 10000-25000mm 3 , preferably 15000mm 3 , 20000mm 3 , 22000mm 3, the capacity of the second cartridge body 132 to accommodate waste powder is improved. In the present embodiment, the second sub-cartridge body 139 is cuboid, and can also be cylindrical or other regular shapes. In some embodiments, the second sub-cartridge body 139 can also be irregularly shaped, with a volume that is referenced to the volume of the aforementioned second sub-cartridge body 139. The internal volume of the second cartridge body 132 is selected to be 58000-70000mm 3 , preferably 62000mm 3 , 68000mm 3 .

[0096] Referring to Figure 14 , the drum assembly further comprises an upper cover 160, which is snap-fitted and screw-connected with the cartridge shell 140. The cartridge 1301 is accommodated in the space between the upper cover 160 and the cartridge shell 140. The upper cover 160 and the lower cover 60 are screw-connected, which enhances the stability of the overall structure of the first accommodating cavity 13 in the drum assembly.

[0097] The first cleaning roller and the second cleaning roller are two cases of cleaning rollers. In some embodiments, the cleaning roller can also be a cleaning blade for cleaning the photosensitive drum. The cleaning roller and the cleaning blade are two cases of cleaning members.

[0098] Embodiment Three

[0099] Referring to Figure 7 , Figures 23 to 28 , the difference between the present embodiment and Embodiment One is that the present embodiment does not have an elastic assembly. In the present embodiment, during installation of the drum assembly 1 in the image forming device, the storage medium 512 and the electrical contact surface 513 are located below the protrusion 911. After the storage medium 512 and the electrical contact surface 513 pass the protrusion 911, they are located below the identification contact 912 and the electrical contact surface 513 is not in electrical contact with the identification contact 912. Then, the door cover 92 of the image forming device is closed, and the drum assembly 1 receives the force of the door cover 92 and is lifted upward as a whole, i.e., the electrical contact surface 513 on the drum assembly is also lifted upward, so that the electrical contact surface 513 is in electrical contact with the identification contact 912. In the absence of special instructions, the structures in the present embodiment are the same as those in Embodiment One, which will not be repeated here.

[0100] In the present embodiment, the drum assembly 1 is also provided with abutting members 71, which are used to cooperate with the door cover 92 of the image forming apparatus to receive the acting force of the door cover 92 and lift the drum assembly 1 upward. The abutting members 71 are provided in two, and are respectively arranged at positions close to the first side wall 11 and the second side wall 12 in the first direction. The abutting members 71 are arranged at the rear of the drum assembly in the second direction compared with the photosensitive drum. Specifically, the abutting members 71 are integrally formed with the drum frame 10, and protrude rearward from the drum assembly, and are located below the storage medium 512 and the electrical contact surface 513 in the third direction, and have abutting inclined surfaces 711 extending rearward in the second direction and upward in the third direction. When the developing cartridge 8 is loaded into the image forming apparatus together with the drum assembly 1, the drum support 51, the storage medium and the electrical contact surface are located below the protrusion 911, and then pass the protrusion 911 and are located below the recognition contact 912 and the electrical contact surface 513 is not in electrical contact with the recognition contact 912, and then the door cover 92 of the image forming apparatus is closed, and the protruding part 921 extending forward in the second direction of the door cover 92 abuts against the abutting inclined surface 711, and the abutting inclined surface 711 receives the upward and forward acting force of the door cover 92 to lift the drum assembly 1 upward as a whole, that is, the electrical contact surface 513 on the drum assembly is also lifted upward, so that the electrical contact surface 513 is in electrical contact with the recognition contact 912. The abutting inclined surface 711 extending rearward in the second direction and upward in the third direction facilitates the abutting of the door cover 92 against the abutting member 71 and provides the upward acting force to the abutting member 71. The abutting inclined surface 711 of the abutting member 71 can be an arc surface or an inclined plane. In some embodiments, the abutting member 71 can also be fixedly mounted to the drum frame 10.

[0101] When the developing cartridge 8 is loaded into the image forming apparatus together with the drum assembly 1, the drum support 51, the storage medium and the electrical contact surface are located below the protrusion 911, and then pass the protrusion 911 and are located below the recognition contact 912 and the electrical contact surface 513 is not in electrical contact with the recognition contact 912, and then the door cover 92 of the image forming apparatus is closed, and the protruding part 921 extending forward in the second direction of the door cover 92 abuts against the abutting inclined surface 711, and the abutting inclined surface 711 receives the upward and forward acting force of the door cover 92 to lift the drum assembly 1 upward as a whole, that is, the electrical contact surface 513 on the drum assembly is also lifted upward, so that the electrical contact surface 513 is in electrical contact with the recognition contact 912. The abutting inclined surface 711 extending rearward in the second direction and upward in the third direction facilitates the abutting of the door cover 92 against the abutting member 71 and provides the upward acting force to the abutting member 71. The abutting inclined surface 711 of the abutting member 71 can be an arc surface or an inclined plane. In some embodiments, the abutting member 71 can also be fixedly mounted to the drum frame 10.

[0102] Preferably, after the abutting member 71 receives the acting force of the door cover, the electrical contact surface 513 is lifted upward by 2mm-5mm relative to the recognition contact 912, and specifically preferably by 3mm or 4mm. Within the range of values, the effect of the abutting member 71 receiving the acting force of the door cover to lift the drum assembly upward is better, and the effect of the electrical contact surface 513 being in electrical contact with the recognition contact 912 is better. Please refer to Figure 31In the second direction, the distance W4 between the shaft roller 311 of the photosensitive drum 31 (i.e. the center of the photosensitive drum) and the abutting member 71 is selected to be greater than 140 mm, and is further preferably 140 mm to 155 mm. In these ranges, the abutting member 71 can receive the abutment of the door cover 92 during the closing of the door cover 92, and is not excessively large in size. The distance W4 is more preferably 147 mm, 150 mm, or 155 mm. The distance W4 is the distance from the shaft roller 311 to the abutting slope 711 in the second direction.

[0103] Referring to Figure 28 , the abutting member 71 near the first side wall 11 is formed integrally with the first side wall 11 at least in the first direction, which strengthens the first side wall 11 and the abutting member 71, and prevents the first side wall 11 and the abutting member 71 from being deformed due to the abutment of the door cover 92 on the abutting member 71. Similarly, the abutting member 71 near the second side wall 12 is formed integrally with the second side wall 12 at least in the first direction, which also strengthens the second side wall 12 and the abutting member 71. The abutting member 71 near the first side wall 11 and the abutting member 71 near the second side wall 12 at least partially overlap in the first direction. In some embodiments, the abutting members 71 can also not overlap.

[0104] The abutting member 71 is located behind the urging member 201 in the second direction, which facilitates the abutting member 71 receiving the force of the door cover of the image forming apparatus. The drum frame 10 is provided with a locking member 202 on the side near the second side wall 12, which is rotatable relative to the drum frame 10. When the developing cartridge 8 is installed in the drum assembly 1, the locking member 202 is provided for the locking protrusion on the developing cartridge to be inserted therein to prevent the developing cartridge from falling off the drum assembly 1. The locking member 202 is located behind the urging member in the second direction. The abutting member 71 is located behind the locking member 202 in the second direction.

[0105] In some embodiments, the abutting member 71 can also not overlap the first side wall 11 or the second side wall 12 in the first direction. The abutting member 71 can also be fixed to the drum frame 10, or can be a reinforced abutting member 71 installed on the bottom wall 16 of the drum frame. In some embodiments, the abutting member 71 can also be flush with the storage medium and the electrical contact surface 513 in the third direction, or can overlap or be below the storage medium or the electrical contact surface in the second direction. The door cover 92 can abut against the abutting member 71 and lift the drum assembly upward. The abutting member 71 can also be located substantially in the middle between the first side wall and the second side wall 12 in the first direction.

[0106] Referring to Figure 1 , Figure 25 and Figure 27The drum support 51 is detachably mounted to the first side wall 11. The drum support 51 is provided with a first mounting hole 514 at the front end thereof in the second direction, and the left side of the first side wall 11 is formed with a fastening portion 111, which is specifically a mounting post extending leftward and protruding from the first side wall 11, and the mounting post is provided with a second mounting hole 112. The drum support 51 is mounted to the first side wall 11 by means of a threaded fastener such as a screw passing through the first mounting hole 514 and the second mounting hole 112. The drum support 51 is provided with a first inclined surface 515 at the front end thereof and a second inclined surface 516 at the rear end thereof, the first inclined surface 515 extending forward in the second direction and downward in the third direction, and the second inclined surface 516 extending rearward in the second direction and downward in the third direction. Please refer to Figure 7 、 Figure 23 The developing cartridge 8 is also provided with an identification assembly including a support 831, a storage medium 832, and an electrical contact surface 833, and the electrical contact surface 833 is electrically connected to the identification contact 914 in front of the protrusion 913. The lifting assembly includes an abutting member 71.

[0107] The embodiment is also provided with the waste powder bin 130 with increased capacity, the conveying roller 37, the charging member 32, the transfer roller 33, the first cleaning roller 34, the second cleaning roller 35, the electric elimination member 36, the transmission assembly bin body shell 140, and the like as in Embodiment Two, which will not be repeated here. Please refer to Figure 12 、 Figure 13 、 Figure 15 、 Figure 28 and Figure 29 The difference between the embodiment and Embodiment Two is that the shape of the bin body shell 140 and the shape of the front wall 1323 of the second bin body 132 are different. In the embodiment, the front wall 1323 of the second bin body is entirely inclined, extending forward in the second direction and upward in the third direction, that is, the front wall 1383 of the first sub-bin body and the front wall 1393 of the second sub-bin body both extend forward in the second direction and upward in the third direction, and the front wall 1383 of the first sub-bin body is located in front of the front wall 1393 of the second sub-bin body in the second direction. Correspondingly, the front wall of the bin body shell 140 is matched with the front wall 1323 of the second bin body, and the front wall of the bin body shell 140 is also entirely inclined, extending forward in the second direction and upward in the third direction, that is, the front wall of the first bin body shell 141 and the front wall of the second bin body shell 142 both extend forward in the second direction and upward in the third direction, and the front wall of the first bin body shell 141 is located in front of the front wall of the second bin body shell in the second direction. In this way, when the drum assembly is installed into the image forming apparatus, under the premise that the second bin body 132 has a large waste powder capacity, the second bin body shell 142 can also effectively avoid the components in front of the image forming apparatus, so that the drum assembly cannot be correctly installed into the image forming apparatus.

[0108] The internal volume of the second cartridge body 132 is preferably greater than 36000mm 3 , more preferably 40000mm 3 -70000mm 3 In these ranges, the amount of waste toner that can be contained in the second cartridge body 132 is increased. The internal volume of the second cartridge body 132 is preferably 53000mm 3 , 55000mm 3 , 58000mm 3 , 62000mm 3 The height dimension H2 of the second cartridge body 132 is preferably 25mm-33mm, and more preferably 28mm or 29mm. The height dimension H4 of the cartridge housing 140 is preferably 25mm-33mm, and in this range, the cartridge housing 140 can effectively avoid components in front of the image forming apparatus, so that the drum assembly can be correctly installed in the image forming apparatus. The height dimension H4 is preferably 26mm, 28mm or 29mm. In the absence of specific description, the structure and / or size and / or volume of the first cartridge body 131, the second cartridge body 132, the first sub-cartridge body 138, the second sub-cartridge body 139, the cartridge housing 140, the first cartridge housing 141 and the second cartridge housing 142 of the waste toner cartridge 130 in this embodiment are the same as those in Embodiment 2, and will not be repeated here.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered in the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A drum assembly, characterized in that, The drum assembly is detachably mounted to the developing cartridge, and the drum assembly includes: Drum frame; A photosensitive drum extends along a first direction and is rotatably supported at both ends of the drum frame in the first direction, and is located in front of the drum assembly in a second direction; A drum recognition component includes an electrical contact surface disposed at one end of the drum frame in a first direction, and the electrical contact surface is fixedly disposed relative to the drum frame. The lifting assembly is capable of lifting the drum assembly and the electrical contact surface.

2. The drum assembly according to claim 1, characterized in that, The lifting component is an abutment, and the electrical contact surface and the abutment are disposed behind the photosensitive drum in a second direction relative to the drum assembly.

3. The drum assembly according to claim 2, characterized in that, The abutment has an abutment ramp that extends rearward in a second direction and upward in a third direction.

4. The drum assembly according to claim 2, characterized in that, The drum assembly also includes a pusher, and the abutment is located behind the pusher in a second direction.

5. The drum assembly according to claim 2, characterized in that, The drum assembly also includes a locking member, and the abutment is located behind the locking member in a second direction.

6. The drum assembly according to claim 2, characterized in that, The distance from the center of the photosensitive drum to the abutment in the second direction is greater than 140 mm.

7. The drum assembly according to claim 6, characterized in that, The distance is 140-155mm or 147-155mm.

8. The drum assembly according to claim 6, characterized in that, The abutment includes an abutment ramp that extends rearward in a second direction and upward in a third direction; the distance is the distance from the center of the photosensitive drum to the abutment ramp in the second direction.

9. The drum assembly according to claim 2, characterized in that, The drum frame further includes a first sidewall, a second sidewall, and a third sidewall, the third sidewall connecting the first sidewall and the second sidewall, and the photosensitive drum being supported between the first sidewall and the second sidewall; The electrical contact surface is disposed on the first sidewall; The abutment is closer to the first sidewall than the second sidewall in the second direction.

10. The drum assembly according to claim 9, characterized in that, The abutment is disposed on the first side wall.

11. The drum assembly according to claim 9, characterized in that, Two abutting members are provided, one abutting member is located near the first side wall, and the other abutting member is located near the second side wall.

12. The drum assembly according to any one of claims 2-11, characterized in that, The abutting member and the drum frame are integrally formed, or the abutting member is installed and fixed to the drum frame.

13. The drum assembly according to any one of claims 2-11, characterized in that, The abutment can receive the force of the door cover of the image forming apparatus.

14. The drum assembly according to claim 1, characterized in that, The lifting component is an elastic component.

15. The drum assembly according to claim 14, characterized in that, The electrical contact surface is located behind the photosensitive drum in the second direction; The elastic component is disposed on the bottom wall of the drum frame in a third direction, and the elastic component is disposed behind the photosensitive drum in a second direction.

16. The drum assembly according to claim 15, characterized in that, The elastic component includes an elastic member and an abutment member, the elastic member abutting between the drum frame and the abutment member, the elastic member extending forward in the second direction and upward in the third direction.

17. The drum assembly according to claim 16, characterized in that, The bottom wall of the drum frame includes a mounting portion, the mounting portion including a first mounting cavity formed by recesses in a second direction forward and in a third direction upward, one end of the elastic member abutting the first mounting cavity and the other end abutting the abutting member.

18. The drum assembly according to claim 17, characterized in that, The sidewall of the first mounting cavity has a first sliding portion, which extends forward in a second direction and upward in a third direction. The abutment has a second sliding portion, which is slidably connected to the first sliding portion.

19. The drum assembly according to claim 18, characterized in that, One of the first sliding portion and the second sliding portion is a sliding protrusion, and the other is a sliding recess.

20. The drum assembly according to claim 18, characterized in that, The side wall of the first mounting cavity has a first snap-fit ​​portion, and the abutment has a second snap-fit ​​portion, which can snap into the first snap-fit ​​portion.

21. The drum assembly according to claim 20, characterized in that, The second locking part has two parts, which are respectively located on both sides of the side wall of the abutment in the first direction, and the second sliding part is located on the rear side of the abutment in the second direction.

22. The drum assembly according to any one of claims 2-11 and 14-21, characterized in that, The drum assembly further includes a second chamber and a cleaning element extending along a first direction, the cleaning element being in contact with the photosensitive drum; The second compartment has a first sub-compartment and a second sub-compartment that are connected in a third direction. In a second direction, the front wall of the first sub-compartment is forward of the front wall of the second sub-compartment, and the first sub-compartment is located above the second sub-compartment.

23. The drum assembly according to claim 22, characterized in that, The internal volume of the second compartment is 40,000-70,000 mm². 3 Or 53000-70000mm 3 Or 58000-70000mm 3 Or 58000-62000mm 3 .

24. The drum assembly according to claim 22, characterized in that, The second compartment has a length of 234-240mm in the first direction and a height of 25mm-33mm or 28-33mm in the third direction.

25. The drum assembly according to claim 22, characterized in that, The second sub-compartment is rectangular in shape. The length of the second sub-compartment along the first direction is 170-225mm, the width along the second direction is 5-15mm, and the height along the third direction is 1-15mm.

26. The drum assembly according to claim 25, characterized in that, The second sub-compartment has a length of 220-225mm, a width of 10-15mm, and a height of 10-15mm.

27. The drum assembly according to claim 25, characterized in that, The internal volume of the second sub-compartment is 10000-25000 mm². 3 Or 15000-25000mm 3 Or 20000-25000mm 3 Or 22000-25000mm 3 .

28. The drum assembly according to claim 22, characterized in that, The drum assembly also includes a housing shell, the shape of which is adapted to the shape of the second housing, and the housing shell is used to accommodate and support the second housing; The outer shell of the compartment has a height dimension of 25mm-33mm in a third direction.

29. The drum assembly according to claim 28, characterized in that, The outer shell of the compartment includes a first outer shell and a second outer shell, with the first outer shell located above the second outer shell; The second compartment shell has a length of 170-225mm in the first direction, a width of 5-15mm in the second direction, and a height of 2-18mm in the third direction.

30. The drum assembly according to claim 28, characterized in that, The front wall of the second compartment is sloping. The front walls of the first and second sub-compartments both extend forward in the second direction and upward in the third direction, and the front wall of the first sub-compartment is located in front of the front wall of the second sub-compartment in the second direction.

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