Drum assembly

Abstract

The embodiment of the invention 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] The embodiments of the present application relate to the field of electronic imaging technology, and in particular to a drum assembly. Background Art

[0002] The drum assembly and developer cartridge are assembled together to form a process cartridge, which is then installed in an image forming device for printing and developing. The drum assembly comprises a drum frame and a drum identification assembly, which includes a drum holder, a storage medium storing drum assembly information, and electrical contacts electrically connected to the storage medium. Image forming devices are typically equipped with identification contacts that read information stored in the storage medium to identify the drum assembly.

[0003] To ensure stable contact between the identification contact and the electrical contact surface, the identification contact is typically positioned within a recess within the image forming device. This allows the storage medium to enter the recess and be restrained by the sidewalls of the recess, thereby ensuring stable contact between the electrical contact surface and the identification contact, preventing poor contact. However, to accommodate this image forming device, a slide rail must be provided on the drum assembly to enable the drum bracket to slide relative to the drum frame. Otherwise, the storage medium cannot enter the recess where the identification contact is located, resulting in the electrical contact surface being unable to make electrical contact with the identification contact of the image forming device and the drum assembly being unable to be identified. Summary of the Invention

[0004] In view of the above problems, an embodiment of the present application provides a drum assembly, which is equipped with a lifting assembly on the drum assembly to lift the drum assembly relative to the image forming device, so that the electrical contact surface is in electrical contact with the identification contact of the image forming device and the drum assembly can be identified.

[0005] According to one aspect of an embodiment of the present application, a drum assembly is provided, which is detachably mounted on a developing box, and includes a drum frame, a photosensitive drum, a drum identification assembly, an electrical contact surface, and a lifting assembly; the 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; the drum identification assembly includes an electrical contact surface, which is arranged at one end of the drum frame in the first direction, and is fixed 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 a contact member, and the electrical contact surface and the contact member are arranged behind the drum assembly compared to the photosensitive drum in the second direction.

[0007] Optionally, the abutment member has an abutment slope, which extends rearward in the second direction and upward in the third direction.

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

[0009] Optionally, the drum assembly further includes a locking member, and the abutting member is located behind the locking member in the second direction.

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

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

[0012] Optionally, the abutment member includes an abutment slope, which 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 abutment slope in the second direction.

[0013] Optionally, the drum frame also includes 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, and 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; and the abutment is closer to the first side wall than to the second side wall in the second direction.

[0014] Optionally, the abutment member is provided on the first side wall.

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

[0016] Optionally, the abutting member and the drum frame are integrally formed, or the abutting member is mounted and fixed on the drum frame.

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

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

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

[0020] Optionally, the elastic component includes an elastic member and an abutting member, the elastic member abuts between the drum frame and the abutting member, and the elastic member extends forward in the second direction and extends upward in the third direction.

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

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

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

[0024] Optionally, the side wall of the first installation cavity has a first clamping portion, and the abutting member has a second clamping portion, and the second clamping portion can be clamped with the first clamping portion.

[0025] Optionally, there are two second clamping portions, which are respectively located on both sides of the side wall of the abutment in the first direction, and the second sliding portion is located on the rear side of the abutment in the second direction.

[0026] Optionally, the drum assembly also includes a second bin body and a cleaning member extending along the first direction, which is in contact with the photosensitive drum; the second bin body has a first sub-bin body and a second sub-bin body connected in a third direction, and the front wall of the first sub-bin body is closer to the front wall of the second sub-bin body in the second direction, and the first sub-bin body is located above the second sub-bin body.

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

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

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

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

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

[0032] Optionally, the drum assembly further includes a silo shell, the shape of which is adapted to the shape of the second silo, and the silo shell is used to accommodate and support the second silo; the height dimension of the silo shell in the third direction is 25mm-33mm.

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

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

[0035] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0037] Figure 1 and Figure 2 The structure diagram of the drum assembly provided in the first embodiment and its partial structure enlarged diagram are shown.

[0038] Figure 1a A schematic structural diagram of the storage medium and electrical contact surface in the drum assembly provided in the first embodiment is shown.

[0039] Figure 3 Shown Figure 2 The exploded structural diagram of the elastic component in the drum assembly and its partially enlarged structural diagram are provided.

[0040] Figure 4 The structure diagram of the drum assembly provided by the first embodiment without the abutment member is shown.

[0041] Figure 5 FIG. 1 shows a schematic structural diagram of the abutment member of the drum assembly provided in the first embodiment.

[0042] Figure 6 The structure diagram of the drum assembly provided by the first embodiment without the elastic assembly is shown.

[0043] Figure 7shows a schematic structural diagram of the side wall of the cavity of the image forming device,

[0044] Figure 8 The figure shows a structural diagram from the bottom perspective of a drum assembly provided by the first embodiment, which is provided with two sets of elastic components.

[0045] Figure 9 Shown Figure 8 A structural diagram of the drum assembly from another perspective is provided.

[0046] Figure 10 A structural schematic diagram showing another perspective of the drum assembly provided by the first embodiment, in which two sets of elastic components are provided, is shown.

[0047] Figure 11 FIG. 2 shows a schematic structural diagram of a drum assembly provided in the second embodiment.

[0048] Figure 12 FIG. 1 shows a cross-sectional structural diagram of a drum assembly provided in Example 2.

[0049] Figures 13 to 15 The exploded structural diagram of the drum assembly and its partial structure provided in the second embodiment is shown. Figure 16 FIG. 1 shows a partial structural diagram of the drum assembly provided in the second embodiment.

[0050] Figure 17 FIG. 1 shows a schematic cross-sectional view of a portion of the drum assembly provided in the second embodiment.

[0051] Figure 18 FIG. 1 shows a schematic side projection structure diagram of the drum assembly provided in the second embodiment.

[0052] Figure 19 FIG. 1 shows a schematic diagram of a top projection structure of a drum assembly provided in Example 2.

[0053] Figure 20 The figure shows a rear projection structure diagram of the drum assembly provided in the second embodiment.

[0054] Figure 21 FIG. 1 shows a rear view projection structure diagram of a drum frame in a drum assembly provided in the second embodiment.

[0055] Figure 22 FIG. 1 shows a schematic diagram of a bottom projection structure of a drum frame in a drum assembly provided in Example 2.

[0056] Figure 23 The figure shows a three-dimensional structure diagram of the drum assembly provided by the third embodiment, in which the developing cartridge is installed and the drum assembly cooperates with the door cover of the image forming apparatus.

[0057] Figure 24 Shown Figure 23Schematic diagram of the explosion structure in

[0058] Figure 25 A schematic side projection structure diagram of the drum assembly provided in the third embodiment cooperating with the door cover of the image forming device is shown.

[0059] Figure 26 FIG. 1 shows a schematic diagram of the three-dimensional structure of the drum assembly provided in the third embodiment.

[0060] Figure 27 FIG. 1 shows an exploded structural diagram of a drum identification component in a drum assembly provided in Example 3.

[0061] Figure 28 and Figure 29 FIG. 1 shows a schematic diagram of the three-dimensional structure of the drum assembly provided in the third embodiment.

[0062] Figure 30 Schematic diagram showing the structure of the front wall of the second chamber in the drum assembly provided in the third embodiment.

[0063] Figure 31 A schematic side projection structure diagram of the drum assembly provided in the third embodiment is shown. DETAILED DESCRIPTION

[0064] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0066] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0067] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0068] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0069] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0070] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0071] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0072] Example 1:

[0073] See also Figures 1 to 8 The present application provides a drum assembly having a first direction, a second direction, and a third direction intersecting each other. For ease of description, the first direction is described as a left-right direction, the second direction as a front-back direction, and the third direction as an up-down direction. The first direction, the second direction, and the third direction are preferably perpendicular to each other.

[0074] The drum assembly includes a drum frame 10 and a drum identification assembly 50. The drum frame has a first sidewall 11 and a second sidewall 12, which face each other in a first direction. A third sidewall 16 connects the first and second sidewalls 11 and 12. A first accommodating chamber 13 and a second accommodating chamber 14 are formed between the first, second, and third sidewalls 11, 12, and 16. The first accommodating chamber is used to accommodate a photosensitive drum that extends in a first direction and rotates about a rotation axis extending in the first direction. The second accommodating chamber is used to accommodate a developer cartridge. The first accommodating chamber 13 is located forward of the second accommodating chamber 14 in a second direction. When assembled, the drum assembly and developer cartridge form a process cartridge. The photosensitive drum receives developer from the developer roller of the developer cartridge. The drum identification assembly is mounted on the first sidewall 11 and includes a drum bracket 51, a storage medium 512, and an electrical contact surface 513 electrically connected to the storage medium 512. The drum bracket is fixedly mounted on the first sidewall 11 or integrally formed with the first sidewall 11. The drum bracket 51 is formed with an identification recess 511. The storage medium 512 is used to store information of the drum assembly. The storage medium 512 can specifically be a chip. The storage medium 512 is fixedly mounted in the identification recess of the drum bracket. The electrical contact surface 513 is used to electrically contact the identification contact of the image forming device to make the drum assembly of the image forming device. 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 member, which is mounted on the drum bracket. The electrical contact member is conductive, and the electrical contact surface 513 is electrically connected to the chip through the electrical contact member. In some embodiments, the storage medium 512 can also be arranged not on the drum identification assembly, but on the drum frame or the developer box. The electrical contact surface 513 can also be electrically connected to the storage medium 512 through the electrical contact member. The electrical contact surface 513 is fixed or movable relative to the drum frame. The fixed arrangement of the electrical contact surface 513 relative to the drum frame is simple.

[0075] The drum frame is provided with an elastic component, which is used to cooperate with the image forming device to lift the drum assembly so that the electrical contact surface 513 of the drum identification component is electrically connected to the identification contact of the image forming device, thereby allowing the drum assembly to be identified by the image forming device. The elastic component is disposed on the third side wall, which is also the bottom wall of the drum frame. The elastic component is located behind the drum assembly relative to the photosensitive drum in the second direction. The elastic component includes an elastic member 22 and an abutment member 23. The third side wall is integrally formed with a mounting portion 20. The mounting portion 20 includes a first mounting cavity 21 that is recessed forward in the second direction and upward in the third direction. The elastic member 22 extends forward and upward, with one end of the elastic member 22 abutting the first mounting cavity 21 and the other end abutting the abutment member 23. The elastic member is elastically deformable and is preferably a spring. The elastic member can also be other elastically deformable structures or materials, such as an elastically deformable plastic member. The abutment member 23 is used to abut the bottom wall of the cavity that accommodates the processing cartridge of the image forming device. 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 abutment 23 has a second sliding portion 231 and a second clamping portion 232, the second sliding portion 231 is slidably connected to the first sliding portion 221 so that the abutment 23 can stably move relative to the mounting portion 20 or the drum frame 10 in the second direction and the third direction along the extension direction of the first sliding portion and the second sliding portion, and the second clamping portion 232 is clamped with the first clamping portion 232 to prevent the abutment 23 from detaching from the mounting portion 20 when it moves backward in the second direction and downward in the third direction relative to the mounting portion 20 or the drum frame 10.

[0076] See 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, which protrudes from the side wall of the installation cavity in the second direction and the third direction. The second clamping portion 232 is specifically a hook, which protrudes outward from the front side wall of the abutment 23. When the abutment 23 moves backward and downward, the recess formed on the 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 abutment 23 from detaching from the installation portion 20. In some embodiments, the mating surfaces of the first clamping portion 212 and the second clamping portion 232 are flat. The left and right side walls of the first mounting cavity 21 are formed with protrusions, and the left and right side walls of the abutment member 23 are formed with hooks. The multiple hooks cooperate with the protrusions to more effectively prevent the abutment member 23 from being separated from the mounting portion 20. The second engaging portion 232 is elastically deformable to facilitate the abutment member 23 to be installed in the mounting portion 20 through the first mounting cavity 21.

[0077] like Figure 5As shown in , a second mounting cavity 230 is formed on the front upper side of the mounting portion 20, 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 a non-preset direction, so that the elastic member 22 can effectively expand and contract along the second direction and the third direction. The two second clamping portions 232 are respectively located on the left and right sides of the side wall of the abutment member 23 in the first direction, and the second sliding portion 231 is located on the rear side of the abutment member 23, which facilitates the layout of the overall structure of the abutment member 23. The front side of the side wall of the abutment member 23 is also formed with an inclined surface 233 (see Figure 3 ), the inclined surface 233 extends forward and upward, and the inclined surface 233 cooperates with the bottom wall of the cavity of the image forming device, so that when the processing box is installed into the image forming device along the cavity of the image forming device from back to front, the inclined surface of the abutment 23 of the drum assembly can prevent the abutment 23 from being stuck with the uneven bottom wall of the cavity, and the inclined surface 233 of the abutment 23 can receive the upward force provided by the bottom wall, so that the processing box can be smoothly installed into the image forming device. The second installation cavity 230 has a limiting portion 2301, which is used to cooperate with the other end of the elastic member 22 to prevent the elastic member 22 from being displaced. The limiting portion 2301 is a protruding structure in the shape of a cross. The limiting portion 2301 can also be other shapes such as a columnar shape. The limiting portion 2301 can also be a concave structure.

[0078] When assembling the elastic assembly, the elastic member is first installed into the mounting portion 20. The second sliding portion 231 of the abutting member 23 is then engaged with the first sliding portion 211 of the mounting portion 20 from below. A force is applied to the second engaging portion 232, causing the second engaging portion 232 to deform toward the interior of the abutting member 23, thereby installing the abutting member 23 in the first mounting cavity 21. An opening 201 is formed above the mounting portion 20 to facilitate adjustment of the elastic member 22 from above.

[0079] See also Figure 7 The identification contact is located on the guide rail 91 of the side wall, and there is a downward protrusion 911 behind the identification contact 912. When the processing box is loaded into the image forming device from back to front, the drum identification assembly on the drum assembly needs to pass over the protrusion 911 so that the electrical contact surface 513 can contact and electrically connect with the identification contact 912.

[0080] In this embodiment, an elastic component is provided at the bottom of the third wall 16 of the drum assembly so that when the processing box is installed into the image forming device, the abutment 23 abuts against the bottom wall in the cavity. When the drum assembly moves to the drum bracket 51, storage medium 512 or electrical contact surface 513 in the drum identification assembly and abuts against the protrusion 911, the drum assembly is subjected to a downward force, and the mounting portion 20 of the drum assembly compresses the elastic component 22, so that the drum frame 10 and the drum identification assembly rotate downward around the front end of the drum assembly in the second direction and avoid the protrusion 911. After the drum identification assembly passes over the protrusion 911, the rear end of the drum frame 10 in the second direction rotates and rises upward under the elastic recovery action of the elastic component 22, and the drum identification assembly on the drum frame 10 also rotates and rises upward, so that the electrical contact surface 513 is electrically contacted with the identification contacts in front of and above the protrusion 911, so that the image forming device reads and identifies the information stored in the storage medium 512.

[0081] In this embodiment, the drum identification assembly is fixed relative to the drum frame, while the drum bracket, storage medium 512, and electrical contact surface 513 are fixed relative to the drum frame 10. In some embodiments, the drum bracket, storage medium 512, and electrical contact surface 513 are movable relative to the drum frame 10. The same effect can also be achieved by providing the above-mentioned elastic component. The elastic component of this embodiment is provided approximately in the middle of the third side wall 16 in the first direction. A handle 141 for grasping the drum assembly is provided at the rear of the third side wall 16 in the second direction. The elastic component is provided on the handle 141. Please refer to Figures 8 to 10 , multiple elastic components can also be provided, and two elastic components are symmetrically arranged at the bottom of the third side wall 16, so that the elastic component's support and lifting effect on the drum frame is more stable, so that the electrical contact surface 513 reliably maintains electrical connection with the identification contact 912. The drum assembly is provided with a pushing member 201, which is used to provide a forward pushing force to the developer box to move the developing roller forward and contact the photosensitive drum, so that the photosensitive drum can receive the developer on the developing roller. One pushing member 201 is provided at a position close to the first side wall 11, and the other pushing member 201 is provided at a position close to the second side wall 12, such as Figure 10 As shown, one set of elastic components is disposed on the rear side of the pushing member 201 near the first side wall 11, and another set of elastic components is disposed on the rear side of the pushing member 201 near the second side wall 12. This makes the structure of the rear side of the pushing member 201 more compact, making it easier for a large-sized developer cartridge to be installed in the position between the two pushing members and the two elastic components on the third side wall. The lifting assembly includes an elastic component.

[0082] Example 2:

[0083] See also Figures 11 to 22The drum assembly provided in this embodiment differs from that in the first embodiment in that it is equipped with a larger waste toner bin to prevent overflow or reduce waste toner overflow. It should be noted that the drum assembly in this embodiment also includes the elastic assembly (not shown) described in the first embodiment. The following describes in detail the differences between the structure of this embodiment and that of the first embodiment, and structures identical to those in the first embodiment will not be repeated.

[0084] The drum assembly also includes a conveyor roller 37, a photosensitive drum 31, a charging element 32, a transfer roller 33, a first cleaning roller 34, a second cleaning roller 35, and a charge-discharging element 36, all extending in a first direction. The photosensitive drum 31, the transfer roller 33, the first cleaning roller 34, the second cleaning roller 35, and the conveyor roller 37 all rotate about a rotation axis extending in the first direction. The conveyor roller 37 is used to convey a sheet material (such as paper) to the photosensitive drum 31. The photosensitive drum 31 is used to receive developer from the developer roller of the developer cartridge. The charging element 32 is used to charge the photosensitive drum 31 and is spaced apart from the photosensitive drum 31. The transfer roller 33 transfers the toner on the photosensitive drum 31 to the sheet material. The transfer roller 33 is in contact with the photosensitive drum 31. The transfer roller 33 is located below the photosensitive drum 31 in the third direction, with a gap between the transfer roller 31 and the photosensitive drum 31 allowing the sheet material to pass through. The photosensitive drum 31 is positioned between the charging element 32 and the transfer roller 33 in the third direction. The first cleaning roller 34 is used to remove excess developer, also known as waste toner, deposited on the photosensitive drum 42. The first cleaning roller 34 is in contact with the photosensitive drum 42. The second cleaning roller 35 is used to remove developer deposited on the first cleaning roller 34, and the second cleaning roller 35 is in contact with the first cleaning roller 34. The de-electrification element 36 receives a light source and is used to de-electrify the first cleaning roller 34 and the photosensitive drum 31. The photosensitive drum 31, the charging element 32, the transfer roller 33, the first cleaning roller 34, the second cleaning roller 35, and the de-electrification element 36 are disposed in the first accommodating chamber 13. The first accommodating chamber 13 also includes a waste toner bin 130, which accommodates the first cleaning roller 34 and the second cleaning roller 35. The waste toner bin 130 is used to collect waste toner that falls from the first cleaning roller 34 and the second cleaning roller 35.

[0085] The drum assembly includes a transmission assembly, which includes a drive head 61, an idler gear 62, a second gear 65, a first gear 64, and a third gear 63 that are meshed in sequence. The drive head 61 is used to receive the driving force of the image forming device. The drive head 61 is connected to one end of the photosensitive drum 31. When viewed from the first side wall 11 along the first direction, the drive head 61 drives the photosensitive drum 31 along the direction of the first side wall 11. Figure 13The drum assembly rotates clockwise in the direction of the arrow shown. The idler gear 62 is connected to one end of the second cleaning roller 35. The idler gear 62 is respectively engaged with the drive head 61 and the second gear 65. The idler gear 62 receives the driving force transmitted by the drive head 61 and drives the second gear 65 to rotate in the clockwise direction. The second gear 65 rotates clockwise together with the second cleaning roller 35. The second gear 65 includes an outer gear and an inner gear that rotate coaxially. The inner gear is closer to the inner side of the waste toner bin 130 than the outer gear. The inner gear is engaged with the first cleaning roller 34. The inner gear drives the first gear 64 to rotate counterclockwise. The first gear 64 is connected to one end of the first cleaning roller 34 and rotates counterclockwise together with the first cleaning roller 34. The third gear 63 is engaged with the drive head 61 to drive the transfer roller 33 to rotate. The drum assembly also includes a protective cover 60, which covers at least a portion of the transmission assembly. The protective cover 60 is used to protect the transmission assembly. The protective cover 60 defines a first through-hole 601, and the first side wall 11 defines a second through-hole 1101. The photosensitive drum 31 includes a shaft roller 311 and a roller body 312 surrounding the outer periphery of the shaft roller 311. The shaft roller 311 protrudes outward from the roller body 312 in a first direction. One end of the shaft roller 311 is supported by the first through-hole 601 and the second through-hole 1101, and is exposed to the outside of the first side wall 11 to facilitate electrical conduction to the photosensitive drum 31. A plurality of support shafts are provided on the side of the protective cover 60 facing the transmission assembly. These support shafts are used to support the positions of the rotation centers of the first gear 64 and the second gear 65.

[0086] The waste toner 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. The cover body 1302 covers the first bin body 131 and the second bin body 132 .

[0087] The first housing 131 has a first end 1311 and a second end 1312 that are opposite to each other in the first direction. The first cleaning roller 34 is accommodated in the first housing 131. Both ends of the first cleaning roller 34 are rotatably supported by the first end 1311 and the second end 1312. Specifically, the first housing 131 further includes a first bearing 1310, which is respectively disposed at the first end 1311 and the second end 1312. The first cleaning roller 34 includes a roller shaft 341 and a roller body 342 that wraps around the roller shaft 341. Both ends of the roller shaft 341 in the first direction protrude outward from the roller body 342. Both ends of the roller shaft 341 are rotatably supported by the first end 1311 and the second end 1312. The first cleaning roller 34 is located in front of the photosensitive drum 31 in the second direction. The first housing 131 is integrally formed with a support portion 134, which is used to support the de-staticizing element 36. The de-staticizing element 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 de-staticizing element 36 in the third direction overlaps with the projection of the first cleaning roller 34, and the projection of the de-staticizing element 36 in the second direction overlaps with the projection of the photosensitive drum 31. The first housing 131 also includes a first mounting portion 135 and a receiving groove 136. The first mounting portion 135 has a mounting slope, and the front end of the mounting slope is higher than the rear end. The mounting slope is used to mount a first scraper (not shown in the figure). After the rear end of the first scraper is attached to the mounting slope, the front end of the first scraper is higher than the mounting slope in the second direction and higher than the mounting slope in the third direction. The front end of the first scraper contacts the first cleaning roller 34 to allow the waste powder on the first cleaning roller 34 to fall into the scraper. Figure 17 The space between the rear wall 1324 of the second housing and the first scraper is the receiving groove 136 . The first scraper is preferably made of a material with a certain hardness. The first scraper 135 is located between the first cleaning roller 34 and the static dissipation member 36 .

[0088] The second housing 132 has a third end 1321 and a fourth end 1322 that are opposed in the first direction. The second cleaning roller 35 is partially housed within the second housing 132, with both ends of the second cleaning roller 35 rotatably supported by the third end 1321 and the fourth end 1322. Specifically, the second housing 132 also includes a second bearing 1320, which is disposed at the third end 1321 and the fourth end 1322, respectively. The second cleaning roller 35 includes a roller shaft 351 and a roller body 352 that wraps around the roller shaft 351. Both ends of the roller shaft 351 in the first direction protrude outward from the roller body 352, and both ends of the roller shaft 351 are rotatably supported by the third end 1321 and the fourth end 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. The projection of the second cleaning roller 35 in the third direction overlaps with the rear wall 1324. A portion of the second cleaning roller 35 is located within the first housing 131 and another portion is located within the second housing 132. Specifically, the projection of the second bearing 1320 in the third direction overlaps with the rear wall 1324. The rear wall 1324 has a mounting bevel 13241. The front end of the mounting bevel 13241 is positioned forward and upward relative to the rear end, and is used for mounting a second scraper blade (not shown). After the rear end of the second scraper blade is attached to the mounting bevel 13241, the front end of the second scraper blade is positioned forward of the mounting bevel 13241 in the second direction and upward relative to the mounting bevel 13241 in the third direction. The second scraper blade contacts the second cleaning roller 35 to cause waste toner on the second cleaning roller 35 to fall into the first housing 131. The second scraper blade is preferably made of a soft material. It contacts the second cleaning roller 35 near its center in the second direction. The front end of the second scraper blade deforms downward toward the first housing 131, facilitating the drop of waste toner from the second cleaning roller 35 into the first housing 131. The rear wall 1324 of the second housing 132 serves as the front wall of the first housing 131. The projection of the first cleaning roller 34 in the second direction at least partially overlaps with the rear wall 1324 of the second housing 132. The projection of the first cleaning roller 34 in the second direction at least partially overlaps with the second cleaning roller 35, causing the rear wall 1324 of the second housing 132 to extend upward a certain distance in the third direction, thereby increasing the amount of waste toner that can be accommodated in the first housing 131. The cleaning rollers include a first cleaning roller and / or a second cleaning roller.

[0089] Both the cover 1302 and the chamber 1301 have snap-fit ​​structures 1303, which connect the cover 1302 and chamber 1301. The cover 1302 covers the second cleaning roller 35 and the contact area between the first cleaning roller 34 and the second cleaning roller 35, reducing the upward release of waste powder generated by the contact area between the first cleaning roller 34 and the second cleaning roller 35. A mounting protrusion 1304 is formed downwardly at the front end of the cover 1302, and a mounting groove 13231 is formed upwardly at the front end of the second chamber 132. The mounting protrusion 1304 cooperates with the mounting groove 13231 to reduce the release of waste powder from the second chamber 132. Since the second cleaning roller 35 is close to the position where the second bin body 132 and the cover body 1302 cooperate in the second direction, by setting a shielding member 137 in the first bin body 131, the shielding member 137 is between the position where the second bin body 132 and the cover body 1302 cooperate and the second cleaning roller 35 in the second direction, and the lower end 1371 of the shielding member 137 in the third direction is lower than the position where the mounting protrusion 1304 and the mounting groove 13231 cooperate, so as to prevent the waste powder on the second cleaning roller 34 from flying directly to the position where the mounting protrusion 1304 and the mounting groove 13231 cooperate, thereby reducing the overflow of waste powder. The cover 1302 is provided with a mounting groove 13021 facing the second chamber. The mounting groove 13021 accommodates a seal (not shown). The seal may be made of sponge, rubber, or other materials. The seal abuts against the upper portion of the bent shielding member 137 to prevent waste powder from the contact portion between the second cleaning roller 35 and the first cleaning roller 34 from flying directly from the gap between the shielding member 137 and the cover 1302 to the position where the mounting protrusion 1304 and the mounting groove 13231 mate. Mounting holes 1372 are formed at both ends of the shielding member 137, and mating protrusions 13211 are provided on the outer sides of the third end 1321 and the fourth end 1322. The shielding member 137 is fixed to the second chamber 132 through the mounting holes 1372 mating with the mating protrusions 1372.

[0090] Since the capacity of the second hopper body 132 is limited, when the developer box is used with a developer that is low in cost but prone to producing waste powder, and the drum assembly is used with the developer, as the developer on the developer box is consumed or multiple developer boxes are used in sequence with the same drum assembly, the waste powder collected in the second hopper body 132 is prone to bursting, causing the waste powder to overflow from the second hopper body 132.

[0091] See also Figure 15Second housing 132 includes a first sub-housing 138 and a second sub-housing 139 that communicate in the third direction. First sub-housing 138 is located above second sub-housing 139. In the second direction, a front wall 1383 of the first sub-housing is positioned forward of a front wall 1393 of the second sub-housing. This increases the capacity of second housing 132 and allows front wall 1393 of the second sub-housing to clear the image forming device's internal structures when the drum assembly is abutted downward by a protrusion of the image forming device and rotates upward about its front end under the restoring force of the elastic member. The bottom wall of second sub-housing 139 forms second housing bottom wall 1326. Second housing front wall 1323 includes first sub-housing front wall 1383 and second sub-housing front wall 1393.

[0092] See also Figures 18 to 20 The second sub-bin 139 is rectangular in shape, with a length L1 in the first direction of 170-225 mm, a width W1 in the second direction of 5-15 mm, and a height H1 in the third direction of 1-15 mm. This increases the waste toner capacity of the second sub-bin 139 and the second bin 132, reduces the possibility of waste toner overflowing within the second sub-bin 139, and reduces the possibility of waste toner spilling from the mating area between the cover 1302 and the bin 1301, thereby improving the cleanliness of the drum assembly. The length L1 of the second sub-bin 139 is preferably 220 mm, the width W1 is preferably 10 mm, and the height H1 is preferably 10 mm. The length L2 of the second bin 132 is 234-240 mm, and the height H2 is 25-33 mm. The length L2 is preferably 237 mm, and the height H2 is preferably 29 mm.

[0093] See also Figure 13The drum frame further includes a housing shell 140 integrally formed therewith. The housing shell 140 is used to accommodate and support the second housing 132. An elastic member 150 is provided between the housing shell 140 and the second housing 132. The elastic member 150 extends in the second direction, with one end of the elastic member 150 abutting against the housing shell 140 and the other end abutting against the second housing 132. The elastic member 150 is located at both ends of the second housing 132 in the first direction. The elastic member 150 is used to provide elastic force to the second housing 132, allowing the second housing 132 to move relative to the housing shell 140 in the second direction. This satisfies the requirement that the first cleaning roller can still contact the photosensitive drum and the second cleaning roller when there is a deviation in the production dimensions of the first cleaning roller and the second cleaning roller, thereby reducing costs. On the other hand, the housing shell 140 also limits the second housing 132 in the second direction, ensuring the structural stability of the second housing 132. Specifically, the other end of the elastic member 150 abuts against the second bearing 1320 of the second housing 132 , and the first bearing 1310 and the second bearing 1320 are preferably an integral structure.

[0094] See also Figure 13 、 Figure 21 and Figure 22 The shape of the housing 140 matches the shape of the second housing 132. The housing 140 includes a first housing 141 and a second housing 142. The first housing 141 is located above the second housing 142. The second housing 142 is rectangular. The length L3 of the second housing 142 is 170-225 mm, the width W3 is 5-15 mm, and the height H3 is 2-18 mm. The length L3 of the second housing 142 is preferably 220 mm, the width W3 is preferably 10 mm, and the height H3 is preferably 15 mm. The housing 140 provided in this embodiment prevents the excessive height in the third direction from obstructing the forward movement of sheets output from between the photosensitive drum 31 and the transfer roller 33, thereby meeting the requirements of both a large-capacity waste toner bin and sheet transport. In this embodiment, the warehouse shell 140 and the second warehouse body are separate structures. In some embodiments, the warehouse shell 140 and the second warehouse body 132 can also be an integrated structure, and the size of the warehouse shell 140 is the same as the size of the second warehouse body 132.

[0095] The internal volume of the second sub-bin body 139 is selected to be 10000-25000mm 3 , preferably 15000mm 3 , 20000mm 3 , 22000mm 3, increasing the capacity of the second bin body 132 to accommodate waste powder. In this embodiment, the second sub-bin body 139 is a rectangular parallelepiped, but can also be a regular shape such as a cylinder. In some embodiments, the second sub-bin body 139 can also be an irregular shape, and its volume refers to the volume of the aforementioned second sub-bin body 139. The internal volume of the second bin body 132 is selected to be 58000-70000mm 3 , preferably 62000mm 3 、68000mm 3 .

[0096] See also Figure 14 The drum assembly also includes an upper cover 160, which is snap-fitted and threadedly connected to the hopper shell 140. The hopper body 1301 is accommodated in the space between the upper cover 160 and the hopper shell 140. The protective cover 60 and the upper cover 160 are threadedly connected, thereby enhancing the stability of the overall structure of the first accommodating chamber 13 in the drum assembly.

[0097] The first cleaning roller and the second cleaning roller are two situations of cleaning rollers. In certain embodiments, cleaning roller also can clean photosensitive drum with cleaning scraper. Cleaning roller and cleaning scraper are two situations of cleaning member.

[0098] Example 3:

[0099] See also Figure 7 、 Figures 23 to 28 The difference between this embodiment and the first embodiment is that the present embodiment does not include an elastic component. In this embodiment, when the drum assembly 1 is installed in the image forming apparatus, 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 successfully pass over the protrusion 911, they are located below the identification contact 912, and the electrical contact surface 513 does not make electrical contact with the identification contact 912. Then, when the door 92 of the image forming apparatus is closed, the drum assembly 1 receives the force of the door 92 and is lifted 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 makes electrical contact with the identification contact 912. Unless otherwise specified, the structure of this embodiment is the same as that of the first embodiment and will not be repeated here.

[0100] In this embodiment, the drum assembly 1 is also provided with an abutment 71, which is used to cooperate with the door cover 92 of the image forming device to receive the force of the door cover 92 and lift the drum assembly 1 upward. There are two abutment 71, and the abutment 71 is respectively arranged at positions close to the first side wall 11 and the second side wall 12 in the first direction. The abutment 71 is arranged at the rear of the drum assembly compared to the photosensitive drum in the second direction. Specifically, the abutment 71 is formed integrally with the drum frame 10, and the abutment 71 protrudes backward from the drum assembly. The abutment 71 is located below the storage medium 512 and the electrical contact surface 513 in the third direction. The abutment 71 has an abutment slope 711, and the abutment slope 711 extends backward in the second direction and extends upward in the third direction. When the developing cartridge 8 is installed into the image forming apparatus along with the drum assembly 1, the drum holder 51, the storage medium, and the electrical contact surface are located below the protrusion 911. After the drum holder 51, the storage medium 512, and the electrical contact surface 513 successfully pass over the protrusion 911, they are located below the identification contact 912, and the electrical contact surface 513 does not make electrical contact with the identification contact 912. Next, the door cover 92 of the image forming apparatus is rotated and closed. The protrusion 921 of the door cover 92, which extends forward in the second direction, abuts against the abutting slope 711. The abutting slope 711 receives the upward and forward force of the door cover 92, causing the drum assembly 1 to lift 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 makes electrical contact with the identification contact 912. The abutting slope 711 extends rearward in the second direction and upward in the third direction, facilitating the abutment of the door cover 92 against the abutting member 71 and applying an upward force to the abutting member 71. The abutting inclined surface 711 of the abutting member 71 can be a curved surface or an inclined plane. In some embodiments, the abutting member 71 can also be fixed to the drum frame 10 by installation.

[0101] When the developing box 8 is installed into the image forming device together with the drum assembly 1, the drum bracket 51, the storage medium and the electrical contact surface are located below the protrusion 911. During the process of the drum bracket 51, the storage medium 512 and the electrical contact surface 513 smoothly crossing the protrusion 911, the drum bracket 51, the storage medium 512 and the electrical contact surface 513 may not be in contact with the protrusion 911, or may have slight contact with the protrusion 911, which facilitates the smooth installation of the drum assembly and the developing box into the image forming device, and the user has a good installation experience.

[0102] Preferably, after the abutment member 71 receives the force of the door cover, the electrical contact surface 513 is lifted upward relative to the identification contact 912 by 2mm-5mm, more preferably 3mm or 4mm. Within these numerical ranges, the abutment member 71 receives the force of the door cover and lifts the drum assembly upward more effectively, thereby achieving better electrical contact between the electrical contact surface 513 and the identification contact 912. Figure 31In the second direction, the distance W4 between the roller 311 of the photosensitive drum 31 (i.e., the center of the photosensitive drum) and the abutment member 71 is selected to be greater than 140 mm, and more preferably 140 mm to 155 mm. Within this range, the abutment member 71 can be abutted by the door cover 92 during closing without being excessively long. Specifically, W4 is preferably 147 mm, 150 mm, or 155 mm. The distance W4 from the roller 311 to the abutment member 71 is specifically the distance from the roller 311 in the second direction to the abutment inclined surface 711.

[0103] See also Figure 28 At least a portion 712 of the abutment member 71 near the first side wall 11 in the first direction is integrally formed with the first side wall 11, thereby strengthening the strength of the first side wall 11 and the abutment member 71 and preventing deformation of the first side wall 11 and the abutment member 71 due to the abutment of the door cover 92 against the abutment member 71. Similarly, at least a portion 712 of the abutment member 71 near the second side wall 12 in the first direction is integrally formed with the second side wall 12, thereby also strengthening the strength of the second side wall 12 and the abutment member 71. The projections of the abutment member 71 near the first side wall 11 and the abutment member 71 on the second side wall 12 of the frame in the first direction at least partially overlap, although in some embodiments, they may not overlap.

[0104] The abutment member 71 is located behind the pushing member 201 in the second direction, so that the abutment member 71 can receive the force applied by the door cover of the image forming apparatus. The drum frame 10 is provided with a locking member 202 on a side near the second side wall 12. The locking member 202 is rotatable relative to the drum frame 10. When the developer cartridge 8 is installed in the drum assembly 1, the locking protrusion on the developer cartridge is inserted into the locking member 202 to prevent the developer cartridge from falling out of the drum assembly 1. The locking member 202 is located behind the pushing member in the second direction. A portion of the abutment member 71 is located behind the locking member 202 in the second direction.

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

[0106] See also Figure 1 、 Figure 25 and Figure 27The drum bracket 51 is detachably mounted on the first side wall 11. The drum bracket 51 has a first mounting hole 514 starting in the second direction. A fastening portion 111 is formed on the left side of the first side wall 11. The fastening portion is specifically a mounting post. The mounting post extends to the left and protrudes from the first side wall 11. The mounting post is provided with a second mounting hole 112. The drum bracket 51 is mounted on the first side wall 11 by inserting a threaded fastener such as a screw into the first mounting hole 514 and the second mounting hole 112. The drum bracket 51 has a first inclined surface 515 at the front end and a second inclined surface 516 at the rear end. The first inclined surface 515 extends forward in the second direction and downward in the third direction, and the second inclined surface 516 extends backward 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 bracket 831 , a storage medium 832 and an electrical contact surface 833 . The electrical contact surface 833 is electrically connected to the identification contact 914 in front of the protrusion 913 . The lifting assembly includes an abutment member 71 .

[0107] This embodiment also has the waste toner bin 130 with increased capacity, the conveying roller 37, the charging unit 32, the transfer roller 33, the first cleaning roller 34, the second cleaning roller 35, the charge removal unit 36, the transmission assembly bin housing 140 and other structures described in the second embodiment, which will not be repeated here. Figure 12 、 Figure 13 、 Figure 15 、 Figure 28 and Figure 29 This embodiment differs from the second embodiment in that the shape of the housing shell 140 and the shape of the front wall 1323 of the second housing 132 are different. In this embodiment, the front wall 1323 of the second housing is generally inclined, extending forward in the second direction and upward in the third direction. In other words, the front wall 1383 of the first sub-housing and the front wall 1393 of the second sub-housing both extend forward in the second direction and upward in the third direction, and the front wall 1383 of the first sub-housing is located in front of the front wall 1393 of the second sub-housing in the second direction. Correspondingly, the front wall of the bin shell 140 is matched with the front wall 1323 of the second bin body, and the front wall of the bin shell 140 is also inclined as a whole. The front wall of the bin shell 140 extends forward in the second direction and upward in the third direction, that is, the front wall of the first bin shell 141 and the front wall of the second bin shell 142 both extend forward in the second direction and upward in the third direction, and the front wall of the first bin shell 141 is located in front of the front wall of the second bin shell in the second direction. In this way, when the drum assembly is installed in the image forming device, under the premise that the second bin 132 has a larger waste powder capacity, the second bin shell 142 can also effectively avoid the front components in the image forming device to prevent the drum assembly from being correctly installed in the image forming device.

[0108] The internal volume of the second silo 132 is selected to be greater than 36000mm 3 , more preferably 40000mm 3 -70000mm 3 Within these numerical ranges, the amount of waste powder accommodated by the second bin 132 can be increased. The internal volume of the second bin 132 is preferably 53000 mm 3 , 55000mm 3 , 58000mm 3 、62000mm 3 . The height dimension H2 of the second bin body 132 is 25mm-33mm, and the height dimension H2 is preferably 28mm or 29mm. The height dimension H4 of the bin body shell 140 is preferably 25mm-33mm. Within this numerical range, the bin body shell 140 can also effectively avoid the components in the front of the image forming device to prevent the drum assembly from being correctly installed in the image forming device. The height dimension H4 is preferably 26mm, 28mm, or 29mm. Unless otherwise specified, the structure and / or size and / or volume of the first bin body 131, the second bin body 132, the first sub-bin body 138, the second sub-bin body 139, the bin body shell 140, the first bin body shell 141, and the second bin body shell 142 of the waste powder bin 130 in this embodiment are the same as those in Example 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, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A drum assembly, characterized in that: The drum assembly is detachably mounted on the developing cartridge, and the drum assembly comprises: drum frame; a photosensitive drum extending in a first direction and rotatably supported on both ends of the drum frame in the first direction and located in front of the drum assembly in a second direction; a drum identification assembly, comprising an electrical contact surface, the electrical contact surface being disposed at one end of the drum frame in a first direction, the electrical contact surface being fixed relative to the drum frame; A lifting assembly is capable of lifting the drum assembly and the electrical contact surface.

2. The drum assembly according to claim 1, wherein The lifting assembly is a contact member, and the electrical contact surface and the contact member are arranged behind the drum assembly compared to the photosensitive drum in the second direction.

3. The drum assembly according to claim 2, wherein: The abutment piece has an abutment slope extending rearward in the second direction and extending upward in the third direction.

4. The drum assembly according to claim 2, wherein: The drum assembly further includes a pushing member, and the abutting member is located behind the pushing member in the second direction.

5. The drum assembly according to claim 2, wherein: The drum assembly further includes a locking member, and the abutment member is located rearward of the locking member in the second direction.

6. The drum assembly according to claim 2, wherein: The distance from the center of the photosensitive drum to the abutting member in the second direction is greater than 140 mm.

7. The drum assembly according to claim 6, wherein: The distance is 140-155 mm or 147-155 mm.

8. The drum assembly according to claim 6, wherein: The abutting member includes an abutting inclined surface, which 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 inclined surface in the second direction.

9. The drum assembly according to claim 2, wherein: The drum frame further includes a first side wall, a second side wall and a third side wall, wherein the third side wall connects the first side wall and the second side wall, and the photosensitive drum is supported between the first side wall and the second side wall; The electrical contact surface is provided on the first side wall; The abutment member is closer to the first side wall than to the second side wall in the second direction.

10. The drum assembly according to claim 9, wherein The abutment member is disposed on the first side wall.

11. The drum assembly according to claim 9, wherein Two abutting members are provided, one abutting member is provided close to the first side wall, and the other abutting member is provided close to the second side wall.

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

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

14. The drum assembly according to claim 1, wherein The lifting component is an elastic component.

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

16. The drum assembly according to claim 15, wherein The elastic assembly includes an elastic member and an abutting member, the elastic member abuts between the drum frame and the abutting member, and the elastic member extends forward in the second direction and extends upward in the third direction.

17. The drum assembly according to claim 16, wherein The bottom wall of the drum frame includes a mounting portion including a first mounting cavity recessed forward in the second direction and upward in the third direction. One end of the elastic member abuts against the first mounting cavity and the other end abuts against the abutting member.

18. The drum assembly according to claim 17, wherein The side wall of the first installation cavity has a first sliding portion, which extends forward in a second direction and upward in a third direction. The abutment member has a second sliding portion, which is slidably connected to the first sliding portion.

19. The drum assembly according to claim 18, wherein 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 of claim 18, wherein: The side wall of the first installation cavity has a first clamping portion, and the abutting member has a second clamping portion, and the second clamping portion can be clamped with the first clamping portion.

21. The drum assembly according to claim 20, wherein There are two second clamping portions, which are respectively located on both sides of the side wall of the abutting member in the first direction, and the second sliding portion is located at the rear side of the abutting member 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 housing and a cleaning member extending along a first direction, wherein the cleaning member contacts the photosensitive drum; The second bin body has a first sub-bin body and a second sub-bin body connected in the third direction. In the second direction, the front wall of the first sub-bin body is closer to the front wall of the second sub-bin body, and the first sub-bin body is located above the second sub-bin body.

23. The drum assembly according to claim 22, wherein The internal volume of the second warehouse is 40000-70000mm 3 or 53000-70000mm 3 or 58000-70000mm 3 or 58000-62000mm 3 .

24. The drum assembly of claim 22, wherein: The length dimension of the second storage body in the first direction is 234-240 mm, and the height dimension in the third direction is 25 mm-33 mm or 28-33 mm.

25. The drum assembly of claim 22, wherein: The second sub-bin body is in the shape of a rectangular parallelepiped. The length of the second sub-bin body along the first direction is 170-225 mm, the width of the second direction is 5-15 mm, and the height of the second sub-bin body in the third direction is 1-15 mm.

26. The drum assembly of claim 25, wherein: The second sub-chassis has a length of 220-225 mm, a width of 10-15 mm, and a height of 10-15 mm.

27. The drum assembly of claim 25, wherein: The internal volume of the second sub-chassis is 10000-25000mm 3 or 15000-25000mm 3 or 20000-25000mm 3 or 22000-25000mm 3 .

28. The drum assembly of claim 22, wherein: The drum assembly further includes a silo shell, the shape of which is adapted to the shape of the second silo, and the silo shell is used to accommodate and support the second silo; The height of the warehouse shell in the third direction is 25mm-33mm.

29. The drum assembly according to claim 28, wherein The silo housing includes a first silo housing and a second silo housing, wherein the first silo housing is located above the second silo housing; The second bin shell has a length dimension of 170-225 mm in the first direction, a width dimension of 5-15 mm in the second direction, and a height dimension of 2-18 mm in the third direction.

30. The drum assembly of claim 28, wherein: The front wall of the second bin body is inclined, the front wall of the first sub-bin body and the front wall of the second sub-bin body both extend forward in the second direction and upward in the third direction, and the front wall of the first sub-bin body is located in front of the front wall of the second sub-bin body in the second direction.

Images