CN221125085U

CN221125085U - Drum unit and processing box

Info

Publication number: CN221125085U
Application number: CN202322426671.1U
Authority: CN
Inventors: 陈宇; 李颖豪; 陈名栋; 罗琴; 赵文杰
Original assignee: Zhuhai Nastar Information Technology Co ltd
Current assignee: Zhuhai Nastar Information Technology Co ltd
Priority date: 2022-09-06
Filing date: 2023-09-06
Publication date: 2024-06-11
Anticipated expiration: 2033-09-06
Also published as: CN117666303A

Abstract

A drum unit includes a drum holding frame, a photosensitive drum rotatably supported by the drum holding frame for receiving a developer to generate an electrostatic latent image, and a drum coupling; the drum coupler is arranged at one end of the photosensitive drum and can be in transmission connection with the photosensitive drum; wherein the drum coupling is provided with a catching portion provided so as to clamp the driving force transmitting member of the electronic imaging device when the process cartridge is mounted to the electronic imaging device, thereby forming a driving connection with the driving force transmitting member. A process cartridge includes the above-described drum unit. According to the drum unit and the processing box, the grabbing part is arranged on the drum coupling, and the grabbing driving force transmission member is used for transmitting driving force, so that the effects of stable driving connection and smooth driving force transmission are achieved, and the quality of the processing box is improved; and the process cartridge can be provided with more rotating members or cleaning devices in contact with the photosensitive drum without receiving braking force, and there are no defects such as insufficient power.

Description

Drum unit and processing box

Technical Field

The present utility model relates to the field of electronic imaging devices, and more particularly, to a drum unit and a process cartridge.

Background

In the field of electrophotographic image forming apparatuses, an electrophotographic photosensitive member (hereinafter referred to as a photosensitive drum) and a process apparatus acting on the photosensitive drum are integrally formed as a cartridge (generally referred to as a process cartridge). Such a process cartridge is detachable from the main assembly of the electronic image forming apparatus. In such a structure, the electronic image forming apparatus is provided with a driving force transmitting unit, and the process cartridge is provided with a driving force receiving unit that is engaged with the driving force transmitting unit to receive a rotational driving force.

CN113574469a discloses a main assembly driving force transmission unit including a driving force transmission assembly for transmitting a driving force to a process cartridge and a braking force application assembly capable of applying a load to rotation of a photosensitive drum; the corresponding process cartridge is provided with a driving force receiving portion engaged with the driving force transmitting assembly and a braking force receiving portion engaged with the braking force applying assembly.

However, in the process cartridge having the above-described structure, since the braking force is received during the operation of the electronic image forming apparatus, when the process cartridge is required to be provided with more rotating members (such as a stirring frame for loosening toner, a cleaning member contacting the photosensitive drum, etc.), the process cartridge has the problems that the photosensitive drum is not stably connected with the main assembly of the electronic image forming apparatus, the driving transmission is not smooth, and the driving force is insufficient, which results in the failure of the electronic image forming apparatus to perform the normal developing operation.

Therefore, a technical solution to the above-mentioned problems is needed.

Disclosure of utility model

In order to solve the technical problems in the prior art, an object of the present utility model is to provide a drum unit to solve the above technical problems.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a drum unit detachably mountable to an electronic image forming apparatus provided with a driving force transmitting unit including a driving force transmitting member, the drum unit comprising:

a drum holding frame;

A photosensitive drum rotatably supported by the drum holding frame for receiving a developer to generate an electrostatic latent image;

The drum coupler is arranged at one end of the photosensitive drum and can be in transmission connection with the photosensitive drum;

Wherein the drum coupling is provided with a catching portion provided so as to clamp the driving force transmitting member of the electronic imaging device when the process cartridge is mounted to the electronic imaging device, thereby forming a driving connection with the driving force transmitting member.

Preferably, the catching portion is capable of being opened or clamped under a force of the electronic imaging device, and the catching portion is capable of clamping the driving force transmitting member to thereby form a driving connection with the electronic imaging device when the process cartridge is mounted to the electronic imaging device.

Preferably, the driving force transmitting member is provided with a reinforcing cylindrical portion at an end thereof adjacent to the photosensitive drum, and the catching portion is capable of pinching the reinforcing cylindrical portion when the process cartridge is mounted to the electrophotographic image forming apparatus.

Preferably, the catching portion is a flexible member, and the catching portion is provided with a first groove provided so that the driving force transmitting member can be caught and rotated with the first groove of the catching portion when the process cartridge is mounted to the electronic image forming apparatus, the first groove being twisted to clamp the driving force transmitting member to thereby form a driving connection with the driving force transmitting member.

Preferably, the catching portion is provided so as to be movable in the circumferential direction of the photosensitive drum, the first groove is provided with an abutment plane extending in the radial direction of the photosensitive drum, the axial plane of the driving force transmitting member is capable of abutting against the abutment plane when the process cartridge is mounted to the electronic image forming apparatus, and the driving force transmitting member is capable of driving the catching portion to move in the circumferential direction of the photosensitive drum by friction with the abutment plane, thereby twisting the first groove to clamp the driving force transmitting member.

Preferably, the drum coupling further comprises a mounting portion provided with a protruding portion for mounting the catching portion, the catching portion being movable relative to the protruding portion.

Preferably, the mounting portion includes a recess, the side wall of the recess includes a second opening, the protruding portion includes a first opening, the catching portion extends through the first opening to the second opening in a radial direction of the mounting portion, and the catching portion is movable within the second opening.

Preferably, one end of the catching portion is fixedly installed in the protruding portion, and the other end of the catching portion is movable in the circumferential direction of the photosensitive drum.

Preferably, the drum coupling further includes a mounting portion provided at an end portion of the photosensitive drum, the catching portion including at least two catching bars and at least two catching pieces, and a first moving member movable in an axial direction of the photosensitive drum with respect to the mounting portion; the grabbing rod is rotatably arranged on the mounting part, and the grabbing parts are respectively arranged at one ends of the grabbing rods extending out of the mounting part; the first moving part can drive the grabbing rod to rotate when moving, so that at least two grabbing pieces are close to or far away from each other.

Preferably, the mounting part is provided with a mounting groove, the first moving part is provided with a conical part, the conical part is positioned in the mounting groove, a notch of the mounting groove is provided with a limiting part for preventing the conical part from falling out, and the side surface of the conical part is abutted with the part of the grab bar positioned in the mounting groove.

Preferably, the drum coupling further comprises a first elastic member and a second elastic member, the first elastic member being defined between a groove bottom and a tapered portion of the mounting groove; the second elastic piece is used for enabling the grabbing rod to prop against the conical portion.

Preferably, the first moving member further includes a columnar portion extending out of the mounting groove, the columnar portion being abutted with the driving force transmission member when the process cartridge is mounted to the electronic imaging device, the driving force transmission member being movable to drive the entire first moving member.

Preferably, the driving force transmitting member is provided with a positioning boss, and the catching portion grips the positioning boss when the process cartridge is mounted to the electronic image forming apparatus.

Preferably, the drum coupling includes a mounting portion, a jack, a rotating member, a second moving member, and a third moving member; the ejector rod is fixedly arranged on the mounting part, and the second moving part is sleeved outside the ejector rod and can axially move relative to the ejector rod; the third moving part is abutted against the second moving part and can drive the second moving part to move; the rotating piece is in driving connection with the third moving part, and the rotating piece can drive the third moving part to axially move when rotating.

Preferably, the grabbing part comprises at least two clamping jaws, and the clamping jaws are rotatably arranged on the ejector rod;

One end of the clamping jaw is provided with a working surface for grabbing the driving force transmission component, and the other end of the clamping jaw is in butt joint with a trapezoid part arranged on the ejector rod.

Preferably, the drum coupling comprises a third resilient member for providing a restoring force to the second moving member.

Preferably, the process cartridge further includes a push rod capable of receiving a force thereof to move relative to the process cartridge when the process cartridge is mounted to the electronic image forming apparatus; the push rod is connected with the rotating piece through the linkage assembly.

Preferably, the linkage assembly comprises a ring lever and a connecting rod, wherein the ring lever is connected with the push rod and the connecting rod, and the connecting rod is connected with the rotating piece; when the push rod receives the driving force to move, the ring lever can be driven to rotate, and the connecting rod translates to drive the rotating piece to rotate.

Preferably, the drum coupling is provided with an installation part, the grabbing part is provided with a movable part and a movable supporting part, the installation part is installed on the photosensitive drum, at least two movable parts are arranged, the movable parts are movably installed on the installation part, the movable supporting part is movably connected with the movable parts and supports the movable parts, and the movable supporting part is installed in the installation part and can move along the axial direction of the photosensitive drum relative to the installation part; when the movable supporting part moves, the movable part can be driven to rotate on the mounting part, so that at least two movable parts are close to or far away from each other.

Preferably, the movable supporting portion is provided with a cylinder at a center thereof, and the driving force transmitting member abuts against the cylinder when the process cartridge is mounted to the electronic image forming apparatus, thereby pushing the movable supporting portion to be movable relative to the mounting portion in an axial direction of the photosensitive drum.

Preferably, the movable supporting part is provided with at least two supporting components, the supporting components are provided with connecting shafts, and the movable piece is movably arranged on the connecting shafts so that the movable piece can movably rotate on the movable supporting part.

Preferably, the mounting portion is provided with a disc, the movable supporting portion is provided with a fan-shaped plane, and when the movable supporting portion is mounted in the mounting portion, the disc is abutted with the fan-shaped plane so as to limit movement of the movable supporting portion.

Preferably, the mounting portion is provided with an annular surface, the disk is provided on an inner peripheral wall of the annular surface, the annular surface is provided so as to be capable of abutting or contacting the inner peripheral wall of the driving force transmitting member when the process cartridge is mounted to the electronic image forming apparatus, to prevent the driving force transmitting member from being displaced.

Preferably, the mounting portion is further provided with a second groove, the second groove is L-shaped, and the movable member is movably mounted in the second groove.

Preferably, the movable member includes an inclined plane extending in the axial direction of the drum coupling and a plane extending in the radial direction of the drum coupling, both planes being mounted in the second groove and the plane being connected to the connecting shaft, the inclined plane transmitting the driving force to the photosensitive drum through the grip reinforcing cylindrical portion.

Preferably, the nip portion further includes an elastic member defined between the photosensitive drum and the movable supporting portion; the elastic component is used for enabling the movable supporting part to prop against the mounting part and resetting after the movable supporting part moves.

Preferably, the drum coupling comprises:

A connecting shaft rotatably provided on the drum holding frame, an input end of which is for receiving a driving force of the electrophotographic apparatus, and an output end of which is connected to the photosensitive drum so as to be axially movable relative to the photosensitive drum and rotatable together with the photosensitive drum; the connecting shaft is axially movable between an extended position and a retracted position;

A link movably provided on the drum holding frame for receiving a closing force of the electronic imaging device;

The shaft pushing device is arranged on the connecting shaft and is used for driving the connecting shaft to move along the axial direction according to the acting force of the connecting rod; and

The grabbing part is arranged at the input end of the connecting shaft and is used for grabbing or loosening the driving force transmission component of the electronic imaging device according to the axial movement of the connecting shaft so as to be engaged with or loosened from the input end of the connecting shaft;

The connecting shaft, the connecting rod, the shaft pushing device and the grabbing part are arranged in such a way that when the connecting rod receives the closing force of the electronic imaging device and acts on the shaft pushing device, the shaft pushing device drives the connecting shaft to move from the extending position to the contracting position, and the grabbing part is grabbed and connected with the input end of the connecting shaft by the driving force transmission member under the action of the connecting shaft so that the driving force is transmitted to the photosensitive drum through the connecting shaft; when the closing force of the electronic imaging device is eliminated, the connecting rod is reset and acts on the shaft pushing device, the shaft pushing device drives the connecting shaft to return to the extending position, and the grabbing part loosens the driving force transmission component.

Preferably, the shaft pushing device includes:

the first component is rotationally sleeved on the connecting shaft and connected with the connecting rod;

The second component is rotationally sleeved on the connecting shaft and axially linked with the connecting shaft, and is abutted with the first component and can be pushed by the first component to axially move on the connecting shaft; and

A shaft pushing elastic member provided between the photosensitive drum and the second member;

The first member, the second member and the shaft pushing elastic piece are arranged such that when the first member receives the acting force of the connecting rod to rotate, the first member pushes the second member to move axially, thereby pushing the connecting shaft to move from the extending position to the contracting position; when the connecting rod is reset and acts on the first component, the first component is rotationally reset, and the second component is axially moved and reset under the action of the shaft pushing elastic piece to drive the connecting shaft to return to the extending position.

Preferably, the first member is provided with a first inclined portion, the second member is provided with a second inclined portion, and the first inclined portion and the second inclined portion are abutted so that when the first member rotates, the first inclined portion acts on the second inclined portion to push the second member to move axially.

Preferably, the shaft pushing elastic piece is a spring, the spring is sleeved at the output end of the connecting shaft, and two ends of the spring are respectively abutted with the second member and the end part of the photosensitive drum.

Preferably, a return elastic member is further included, which is connected between the link and the drum holding frame, for return of the link.

Preferably, a link is movably provided on the drum holding frame, a first end thereof for receiving a closing force of the electrophotographic apparatus, and a second end thereof connected to the first member.

Preferably, the catching portion includes at least two catching pieces which are uniformly distributed along a circumferential direction of the connection shaft and which are rotatable to approach toward a central axis direction of the connection shaft so as to catch and abut the driving force transmitting member with the input end of the connection shaft.

Preferably, the drum holding frame is provided with a claw fixing rod, and the gripping member is rotatably arranged on the claw fixing rod;

a first annular groove is formed in the circumferential surface of the input end of the connecting shaft;

The grabbing piece comprises a claw connecting part and a claw grabbing part, the claw connecting part is rotatably arranged on the claw fixing rod, a first end of the claw connecting part is arranged in the first annular groove, a second end of the claw connecting part is connected with the claw grabbing part, so that when the connecting shaft is axially contracted, the claw connecting part and the first annular groove act to rotate around the claw fixing rod to drive the claw grabbing part to approach towards the central shaft direction of the connecting shaft, and the driving force transmission member is grabbed and abutted with the input end of the connecting shaft.

Preferably, the claw grip portion has an arcuate grip surface adapted to the driving force transmission member.

Also included is a process cartridge including the above-described drum unit.

The drum unit and the processing box are more stable in joint of the driving force transmission component and the drum unit, not easy to separate, more stable in power transmission, capable of solving the problems that the photosensitive drum on the existing processing box is unstable in connection with the driving force transmission component of the electronic imaging device and unsmooth in driving force transmission, achieving the effects of stable driving connection and smooth driving force transmission, and the processing box is not applied by the electronic imaging device in the process of receiving driving force.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a conventional electronic imaging device;

fig. 2 is an exploded schematic view of a driving force transmission unit of a conventional electronic imaging device;

FIG. 3 is a schematic view of a conventional first brake force engagement member and brake transfer member;

Fig. 4 is a sectional view of a conventional driving force transmission unit;

Fig. 5 is a cut-away perspective view of a conventional driving force transmission unit;

Fig. 6 is a partial schematic structural view of a driving force transmission unit of a conventional electronic imaging device;

fig. 7 is a schematic structural view of a conventional driving force transmission unit;

FIG. 8 is a schematic view of a conventional process cartridge;

fig. 9 is an exploded view of a conventional process cartridge;

FIG. 10 is a schematic structural view of a drum unit provided in the first embodiment of the present utility model;

FIG. 11 is a top view in cross-section of the mating relationship of the drive force transmitting unit and the drum unit provided in the first embodiment of the present utility model;

fig. 12 is another angle of a cross-sectional view of the mating relationship of the driving force transmission unit and the drum unit provided in the first embodiment of the present utility model;

FIG. 13 is a schematic view showing a process cartridge according to a second embodiment of the present utility model;

Fig. 14 is a schematic view showing a structure of a process cartridge according to another embodiment of the present utility model;

FIG. 15 is a schematic view of a process cartridge according to another embodiment of the present utility model, in which the end cap is omitted;

FIG. 16 is a schematic view showing a partial structure of a driving end of a process cartridge according to a second embodiment of the present utility model;

FIG. 17 is a schematic view of a drum coupling and linkage assembly provided in a second embodiment of the present utility model;

FIG. 18 is an exploded view of a drum coupling provided in a second embodiment of the present utility model;

FIG. 19 is a schematic cross-sectional view of a drum coupling provided in a second embodiment of the present utility model;

FIG. 20 is a schematic cross-sectional view of a drum coupling and drive force transmitting member provided in a second embodiment of the present utility model;

Fig. 21 is a schematic structural view of a drum coupling and a driving force transmission member provided in the third embodiment of the present utility model;

fig. 22 is a schematic structural view of a mounting portion provided in a third embodiment of the present utility model;

FIG. 23 is a schematic structural view of a drum coupling provided in a third embodiment of the present utility model;

FIG. 24 is a perspective view of a drum coupling provided in a third embodiment of the present utility model;

Fig. 25 is a schematic view showing a fitting structure of a drum coupling and a driving force transmission member provided in the third embodiment of the present utility model;

Fig. 26 is a schematic structural view of a coupling according to a fourth embodiment of the present utility model;

Fig. 27 is an exploded view of a coupling provided in a fourth embodiment of the present utility model;

fig. 28 is a cross-sectional view of a coupling provided in a fourth embodiment of the present utility model;

fig. 29 is a schematic view showing a structure of a coupling provided in the fourth embodiment of the present utility model when the coupling is not engaged with the driving force transmission member;

Fig. 30 is a cross-sectional view of the coupling provided in the fourth embodiment of the utility model in initial engagement with the drive force transmitting member;

fig. 31 is a cross-sectional view showing complete engagement of the coupling and the driving force transmission member provided in the fourth embodiment of the present utility model;

FIG. 32 is a schematic view showing the structure of a process cartridge in a fifth embodiment of the present utility model;

FIG. 33 is an exploded view of the process cartridge in the fifth embodiment of the present utility model;

FIG. 34 is a schematic view showing a structure of a process cartridge according to a fifth embodiment of the present utility model, omitting a fixing table;

FIG. 35 is a side perspective view of a process cartridge in a fifth embodiment of the present utility model, omitting a fixing table;

FIG. 36 is a schematic view showing a structure of a connecting shaft in a fifth embodiment of the present utility model;

fig. 37 is a schematic view showing another angle of the process cartridge in the fifth embodiment of the present utility model.

Detailed Description

The present utility model will now be described in further detail with reference to the accompanying drawings, wherein the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and include, for example, either fixedly attached, detachably attached, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the above description, descriptions of the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

As shown in fig. 1 to 9, a process cartridge 100 is provided, in which a developer is stored in the process cartridge 100, and the process cartridge 100 is adapted to be mounted in an electrophotographic image forming apparatus M (e.g., a printer) so that the electrophotographic image forming apparatus M can perform image formation using the developer in the process cartridge 100.

Referring to fig. 1, an electronic imaging device M is basically the same in structure and principle as the electronic imaging device M disclosed in the patent CN113574469a, and only briefly described below with respect to the electronic imaging device M, in the following description, reference numerals identical to those of the patent CN113574469a belong to the same components, and have the same structure and operation principle.

The electronic image forming apparatus M includes a main assembly 170, a drawer 171, and a door cover 11, the main assembly 170 having a receiving portion, a driving force transmitting unit 203, a separating mechanism, a transfer unit, and the like provided therein, the drawer 171 being capable of receiving the process cartridge 100 and moving relative to the main assembly 170 to mount the process cartridge 100 into the receiving portion of the main assembly 170. The door cover 11 is provided at an outer side of the main assembly 170, and is capable of opening or closing the receiving part of the main assembly 170.

The electronic image forming apparatus M is generally provided with a plurality of detachably mountable process cartridges 100, and preferably, the electronic image forming apparatus M is provided with four detachably mountable process cartridges 100 (100Y, 100M, 100C, 100K), namely, a first process cartridge 100Y, a second process cartridge 100M, a third process cartridge 100C, and a fourth process cartridge 100K. The four process cartridges 100 are arranged substantially horizontally, and when mounted in the electronic image forming apparatus M, the process cartridges 100 are drivingly connected to the electronic image forming apparatus M, are capable of receiving a rotational driving force of the electronic image forming apparatus M, enable the process cartridges 100 to perform image formation using developer, and the electronic image forming apparatus M supplies bias voltages (charging bias, developing bias, etc.) to the first to fourth process cartridges 100 (100Y, 100M, 100C, 100K), respectively.

As shown in fig. 2 to 8, the driving force transmitting unit 203 provided on the main assembly 170 includes a driving force transmitting assembly including a rotating member 201 and a driving force transmitting member 180, the rotating member 201 being rotatably supported on a support shaft 202, one end of the driving force transmitting member 180 being provided with a rotation stopping portion 180B for receiving driving force, the other end being provided with a driving force transmitting portion 180v, the driving force transmitting member 180 being movably fitted on the rotating member 201 in an axial direction M1 (including opposite directions M1A and M1B), rotation of the driving force transmitting member 180 being effected by cooperation between the rotation stopping portion 201B provided on the rotating member 201 and the rotation stopping portion 180B provided on the driving force transmitting member 180.

The braking force application assembly includes a braking member 206, a first braking force engagement member 204, a second braking force engagement member 208, a first engagement spring 211, a second engagement spring 210, and a braking force transmission member 207, wherein the braking member 206 includes a fixed side 206a and a rotating side 206b, the fixed side 206a is fixedly connected with the support shaft 202, the rotating side 206b is rotatable relative to the fixed side 206a and generates a braking force, and a method of generating a braking force may be appropriately selected from those using friction and viscosity.

The first braking force engaging member 204 and the second braking force engaging member 208 can be assembled together by being engaged with the rotation stop protrusion 208c and the rotation stop recess 204c by being engaged with the drum coupling 143 provided on the process cartridge 100 to apply a braking force to the process cartridge 100, and can have synchronized operation procedures. The second braking force engagement member 208 is located inside the first braking force engagement member 204, and the engagement portion 204b of the first braking force engagement member 204 can be brought into abutment or abutment with the driving force transmission surface 180d of the driving force transmission portion 180 v.

The shaft portion 207b of the braking force transmitting member 207 passes through the through holes in the middle of the first and second braking force engaging members 204 and 208 and is connected to the rotation side 206b of the braking member 206 so as to be able to transmit braking force to the first and second braking force engaging members 204 and 208. Specifically, the flange portion 207a of the braking force transmitting member 207 is provided with a projection 207e, and the corresponding projection 204e is provided at the flange portion 204a of the first braking force engaging member 204, and when the projection 207e of the braking force transmitting member 207 is engaged with the projection 204e of the first braking force engaging member 204, the braking force transmitting member 207 can transmit braking force to the first braking force engaging member 204.

The first and second braking force engagement members 204, 208 are movable in the axial direction M1 with respect to the braking force transmission member 207 and the braking member 206, and the second and first braking force engagement members 208, 204 will not receive braking force when the protrusion 207e of the braking force transmission member 207 is offset or separated from the protrusion 204e of the first braking force engagement member 204 in the axial direction M1.

Further, referring to fig. 4 and 5, one end of the first engagement spring 211 is pressed against the end face 206d of the brake member 206, and the other end is pressed against the flange portion 204a of the first brake force engagement member 204, the first engagement spring 211 is in a compressed state, which applies an elastic force to the first brake force engagement member 204 in the M1B direction, which can keep the protrusion 207e of the brake transmitting member 207 engaged with the protrusion 204e of the first brake force engagement member 204.

The second engagement spring 210 is a compression coil spring, and is provided so as to be sandwiched and compressed between the end surface 206d of the brake member 206 and the flange portion 207a of the brake force transmitting member 207, the second engagement spring 210 applying a repulsive force (pressing force, elastic force) to each of the end surface 206d of the brake member 206 and the flange portion 207a of the brake force transmitting member 207.

Among the components of the driving force transmission unit 203 described above, the protrusion 207f at the end of the braking force transmission member 207 in the axial direction M1A abuts against the contact surface 180f of the driving force transmission member 180 under the action of the first engagement spring 211 and the second engagement spring 210. The movement of the driving force transmitting member 180 in the direction of the arrow M1B is regulated (restricted) by the axial direction regulating portion 212 so that the driving force transmitting member 180 does not fall off from the main assembly 170 side driving force transmitting unit 203.

Among the above-described components of the driving force transmission unit 203, the driving force transmission member 180 is movable in the directions M1A and M1B with respect to the rotation member 201, and the first braking force engagement member 204 and the second braking force engagement member 208 are movable in the directions M1A and M1B with respect to the braking force transmission member 207 and the rotation member 201, and are also movable in the directions M1A and M1B with respect to the driving force transmission member 180.

When the driving force transmitting member 180 receives a force in the arrow M1A direction from the outside in this state, the driving force transmitting member 180 may move in the arrow M1A direction while compressing the springs 210 and 211. Specifically, after the assembly of the components of the drive transmission unit 203 is completed, the second braking force engagement member 208 is positioned closer to the positioning boss 180i than the first braking force engagement member 204 with the positioning boss 180i of the driving force transmission member 180 as the axis, as shown in fig. 6 and 7. Wherein a face of the driving force transmitting portion 180v facing the first braking force engaging member 204 is provided with a driving force transmitting surface 180d, and an end of the driving force transmitting member 180 near the process cartridge 100 is provided with a reinforcing cylindrical portion 180e.

As shown in fig. 8 and 9, there is a process cartridge 100 detachably mountable to an electrophotographic apparatus M, the process cartridge 100 including a drum unit 108 and a developing unit 109, the drum unit 108 and the developing unit 109 being rotatably connected to each other. Wherein the drum unit 108 includes a drum holding frame 115 (one of the process cartridge 100 housings), and the drum unit includes a photosensitive drum 104, a drum coupling 143, and a drum flange 142. The developing unit 109 includes a developing frame 125 (one of the housings of the process cartridge 100) and a developing roller 106 rotatably supported on the developing frame 125, the developing roller 106 and the photosensitive drum 104 facing each other to enable development work.

As shown in fig. 9, the drum unit is rotatably supported by a driving side casing cover member 116 and a non-driving side casing cover member 117 provided at opposite ends in the longitudinal direction of the process cartridge 100. Further, a drum coupling 143 for transmitting a driving force to the photosensitive drum 104 is provided near one end in the longitudinal direction of the photosensitive drum 104, wherein the drum coupling 143 may be directly connected or indirectly connected to the photosensitive drum 104, one end of the drum coupling 143 is connected to the photosensitive drum 104, and the other end protrudes out of a driving-side cap member 116 provided to the process cartridge 100, is drivingly connected to a driving force transmitting unit 203 of the electrophotographic apparatus M, the driving force transmitting unit 203 being for rotationally driving the drum unit 108 by being connected (engaged) with the drum coupling 143 on the drum unit, and a driving force of a driving motor (not shown) of the main assembly 170 of the electrophotographic apparatus M is transmitted to the photosensitive drum 104 to rotate it. In fig. 7 to 8, M1A is the engagement direction of the drum coupling 143 with the drum drive transmission unit 203, M1B is the direction in which the drum coupling 143 is away from the drum drive transmission unit 203, and the drive force transmission unit 203 is detachably mounted on the electronic imaging device M.

Example 1

Referring to fig. 10 to 12, a process cartridge 100 in which a drum coupling 143 is different from a conventional drum coupling 143 in structure, and the drum unit 108 and the process cartridge 100 are identical in other structures, and are not described in detail herein. And in the present embodiment, the drum coupling 143 is configured not to receive braking force.

The drum coupling 143 includes a mounting portion 1431 and a catching portion 1432, the catching portion 1432 being mounted in the mounting portion 1431.

Wherein the mounting portion 1431 is used for connecting with the photosensitive drum 104, and the mounting portion 1431 is provided with a protruding portion 14311, and the protruding portion 14311 is used for mounting the catching portion 1432. Specifically, the mounting portion 1431 is a substantially cylindrical member, one end of which facing away from the photosensitive drum 104 is a hollow recess, a protruding portion 14311 protruding in the M1A direction is provided in the recess of the mounting portion 1431, the protruding portion 14311 is hollow and extends to one side in the radial direction with a first opening 14311A, and the first opening 14311A faces the inner wall of the recess of the mounting portion 1431; a part of the catching portion 1432 is provided in a cylindrical shape that can be fitted into the hollow of the protruding portion 14311, the other part of the catching portion 1432 to which the part is connected can protrude radially to one side of the protruding portion 14311 through a first opening 14311a provided in a side surface of the protruding portion 14311, a side wall of a recess of the mounting portion 1431 is provided with a second opening 14312 in a radial direction, the other part of the catching portion 1432 protrudes out of the mounting portion 1431 through the second opening 14312 and is substantially flush with an outer side wall of the recess of the mounting portion 1431, and the catching portion 1432 is fixedly mounted in the protruding portion 14311 through a part such that the catching portion 1432 cannot move in the axial direction and the radial direction of the photosensitive drum 104, but can only move in the circumferential direction of the photosensitive drum 104.

Further, the catching portion 1432 can be engaged with the driving force transmitting member 180, and when the process cartridge 100 is mounted to the electrophotographic apparatus M, the catching portion 1432 can clamp the driving force transmitting member 180 to engage the drum coupling 143 with the drum driving force transmitting unit 203, thereby causing the drum coupling 143 to receive the driving force of the electrophotographic apparatus M to rotate the photosensitive drum 104. Specifically, in the present embodiment, the gripping portion 1432 is a flexible member, a portion of the gripping portion 1432 extending radially beyond the protruding portion 14311 is provided with a first groove 14321 extending in the direction of M1B, the first groove 14321 is located between the protruding portion 14311 and a side wall of the mounting portion 1431, the first groove 14321 is provided with two engaging side walls 14321a extending in the axial direction, the two engaging side walls 14321a are provided opposite to each other, and one engaging side wall 14321a located farther from the protruding portion 14311 in the radial direction of the mounting portion 1431 is substantially flush with an inner side wall of the recess in the axial direction; the first recess 14321 corresponds to the position of the reinforcing cylindrical portion 180e of the driving force transmitting member 180, and one engaging side wall 14321a of the protruding portion 14311, which is farther from the mounting portion 1431 in the radial direction, is spaced from the outer wall of the reinforcing cylindrical portion 180e to the axis of the driving force transmitting member 180 by a distance greater than or equal to the distance from the outer wall of the reinforcing cylindrical portion 180e to the axis of the driving force transmitting member 180, and when the driving force transmitting member 180 moves in the direction M1B, the reinforcing cylindrical portion 180e of the driving force transmitting member 180 can engage with the first recess 14321, but in this case, both are not in the engaged state, and when the driving force transmitting member 180 rotates, the engaging portion 1432, which is a flexible member, is twisted to engage with the reinforcing cylindrical portion 180e, i.e., the engaging side wall 14321a is tightly engaged with the inner and outer wall of the reinforcing cylindrical portion 180e so that it can engage with the reinforcing cylindrical portion 180e to receive the driving force.

Further, the first groove 14321 has an abutment plane 14321b in the radial direction of the photosensitive drum 104, the abutment plane 14321b is rough and has a large friction coefficient so that the axial surface of the reinforcing cylindrical portion 180e thereon can abut against the abutment plane 14321b when the driving force transmitting member 180 rotates, and the grip portion 1432 is moved in the circumferential direction of the photosensitive drum 104 by friction force so that the grip portion 1432 is twisted, and the first groove 14321 is caught with the reinforcing cylindrical portion 180 e.

The number of the first grooves 14321 and the number of the protrusions 14311 are identical, and may be set to 1 or more. Preferably, in the present embodiment, the catching portion 1432 and the protruding portion 14311 are both provided, and they are provided on the mounting portion 1431 axisymmetrically with respect to the axis of the mounting portion 1431.

Next, the cooperation between the driving force transmission unit 203 and the drum unit during the loading process and the operation of the process cartridge 100 of the present embodiment will be described with reference to fig. 1 to 12.

Referring to fig. 11, before the process cartridge 100 is pushed into the main assembly 170 and the door 11 of the electronic imaging device M is closed, the driving force transmitting surface 180d of the driving force transmitting member 180 and the first braking force engaging member 204 in the driving force transmitting unit 203 are in a state of being close to each other.

When the door 11 is closed, the driving force transmitting member 180 of the driving force transmitting unit 203 of the main assembly 170 protrudes toward the photosensitive drum 104 of the process cartridge 100 in the M1B direction, at which time:

If the grip portion 1432 is located between the driving force transmitting portion 180v and the gap E of the first braking force engagement member 204 and the second braking force engagement member 208, the driving force transmitting member 180 continues to protrude in the direction approaching the photosensitive drum 104 (i.e., the M1B direction), and the reinforcing cylindrical portion 180E of the driving force transmitting member 180 enters into the first groove 14321 of the grip portion 1432 until the axial surface of the reinforcing cylindrical portion 180E abuts against the abutment plane 14321B of the first groove 14321. At the same time, the driving force transmission member 180 rotates in the a direction, the axial surface of the reinforcing cylindrical portion 180e drives the grip portion 1432 to rotate in the rotation direction a through the abutment plane 14321b, the grip portion 1432 is twisted by the circumferential movement until the first recess 14321 is clamped with the inner and outer walls of the reinforcing cylindrical portion 180e, and therefore, the grip portion 1432 can clamp the reinforcing cylindrical portion 180e, and the grip portion 1432 can thereby receive the driving force from the driving force transmission member 180, thereby driving the photosensitive drum 104 to rotate. That is, in the present embodiment, the force of the driving force transmitting member 180 to rotate the catching portion 1432 has two sources, namely, a friction force between the axial surface of the reinforcing cylindrical portion 180e and the abutment plane 14321b, and a clamping force between the inner and outer walls of the reinforcing cylindrical portion 180e and the first recess 14321.

Of course, the gripping portion 1432 may be separated from the second opening 14312 of the recess after being twisted, but the driving force transmission member 180 may drive the mounting portion 1431 to move through the abutment of the gripping portion 1432 and the protruding portion 14311, so as to drive the photosensitive drum 104 to rotate.

If the grip portion 1432 is not located between the driving force transmitting portion 180v and the gap E of the first and second braking force engagement members 204, 208, the grip portion 1432 may interfere with the first and second braking force engagement members 204, 208 in the axial direction M1. The grip portion 1432 initially abuts against the first and second braking force engagement members 204, 208, the first and second braking force engagement members 204, 208 retract into the driving force transmission member 180 in the M1A direction after receiving the force of the grip portion 1432, the second and first braking force engagement members 208, 204 stop moving toward the photosensitive drum 104, at which time the first braking force engagement member 204 is disconnected from the braking force transmission member 207, the first and second braking force engagement members 204, 208 can be switched to a state rotated without receiving the rotational load of the braking member 206, and the first and second braking force engagement members 204, 208 are compressively switched to a state rotatable relative to the driving force transmission member 180 after receiving the pressing force.

To complete the engagement of the driving force transmitting member 180 and the drum coupling 143, the electrophotographic apparatus M starts to rotate (i.e., the driving force transmitting member 180 rotates in the rotational direction a), at which time, as the driving force transmitting member 180 rotates and approaches toward the photosensitive drum 104, the gap E between the driving force transmitting portion 180v and the first and second braking force engaging members 204 and 208 rotates to the first recess 14321 of the alignment nip 1432, the engagement process between the reinforcing cylindrical portion 180E of the driving force transmitting member 180 and the nip 1432 is the same as the aforementioned engagement process, and will not be repeated here.

Also, while the grip 1432 is engaged with the reinforcing cylindrical portion 180e, the mounting portion 1431 of the drum coupling 143 is also fitted over the outer wall of the reinforcing cylindrical portion 180e through the recess, so that the grip 1432 receives the driving force more stably.

In the process cartridge 100 of the present embodiment, by providing the catching portion 1432, the drive connection between the photosensitive drum 104 and the drive force transmitting member 180 of the electronic image forming apparatus M is stabilized, the drive transmission is smooth, and the use quality of the process cartridge 100 is enhanced. In addition, since the process cartridge 100 in this embodiment does not receive the braking force applied by the electronic image forming apparatus M during the process of receiving the driving force, the process cartridge 100 can be provided with more rotating members or cleaning devices in contact with the photosensitive drum 104, and has a certain general performance without the drawbacks of insufficient power.

Example two

As shown in fig. 13 to 20, another process cartridge 100 is provided in the present embodiment, which includes a developing unit 109, a drum unit 108, a drum coupling 143, and a driving assembly.

As shown in fig. 13 and 14, the developing unit 109 includes a developing frame 125, a developing roller 106, a powder feeding roller, a stirring frame, and a powder discharge blade. The drum unit 108 includes a drum holding frame 115, the photosensitive drum 104, a charging roller, and a cleaning blade.

The developing frame 125 encloses a toner hopper for storing toner, the developing frame 125 is approximately in a long box shape, both ends of the developing frame 125 in the length direction are respectively provided with a driving side bearing 1091 and a conductive side bearing 1092, and the stirring frame, the toner feeding roller and the developing roller 106 are rotatably supported on the driving side bearing 1091 and the conductive side bearing 1092 at both ends of the developing frame 125 in the length direction, and the stirring frame, the toner feeding roller and the developing roller 106 can rotate under the action of the driving unit, and the axial directions of the stirring frame, the toner feeding roller and the developing roller 106 are all along the length direction of the developing frame 125. The carbon powder in the powder bin is stirred by the stirring frame, so that the carbon powder in the powder bin is prevented from caking, and meanwhile, the carbon powder can be conveyed towards the direction of the powder conveying roller, and the powder conveying roller conveys the carbon powder to the developing roller 106 and is adsorbed by the charged developing roller 106.

The drum holding frame 115 encloses a waste toner hopper that collects waste toner, and the drum holding frame 115 also has a length direction, the length direction of which coincides with the length direction of the developing frame 125, and the photosensitive drum 104 is rotatably supported at both ends of the drum holding frame 115 in the length direction, specifically, the photosensitive drum 104 is provided at a lower end side of the drum holding frame 115 in the height direction. The waste toner hopper is disposed along the length direction of the drum holding frame 115, and is located at one side of the photosensitive drum 104. The toner adsorbed by the developing roller 106 is transferred to the photosensitive drum 104 by the potential difference between the developing roller 106 and the photosensitive drum 104, and after transfer, the cleaning scraper is in linear contact with the photosensitive drum 104, so that the toner which is not completely transferred on the surface of the photosensitive drum 104, namely waste toner, is cleaned, and the cleaned waste toner is stored in a waste toner bin. The charging roller is used to uniformly charge the surface of the photosensitive drum 104, so that the photosensitive drum 104 can adsorb carbon powder.

As shown in fig. 13, the drive assembly includes a development coupling 1061, a development roller gear, a powder feed roller gear, and a agitator gear. The driving assembly may be provided at one or both ends of the process cartridge 100 in the longitudinal direction, and in this embodiment, the driving assembly is provided at the same end of the developing unit 109 in the longitudinal direction. The developing shaft coupling 1061, the developing roller gear, the powder feeding roller gear, and the stirring rack gear are disposed outside the driving side bearing 1091, specifically, a supporting hole for supporting the developing shaft coupling 1061 is provided on the driving side bearing 1091, and the developing shaft coupling 1061 is used for meshing with and receiving the driving force of the electronic imaging device M; the developing roller gear is sleeved at one end of the shaft of the developing roller 106 extending from the driving side bearing 1091, the powder feeding roller gear is sleeved at one end of the shaft of the powder feeding roller extending from the driving side bearing 1091, the stirring frame gear is sleeved at one end of the stirring frame extending from the driving side bearing 1091, and the developing roller gear, the powder feeding roller gear and the stirring frame gear are directly or indirectly meshed with the developing coupling 1061 so as to transmit the driving force received by the developing coupling 1061, thereby driving the developing roller 106, the powder feeding roller and the stirring frame to rotate.

The outside of the driving side bearing 1091 is further provided with a developing box cover 1093, and the developing box cover 1093 covers a part of the developing roller gear, the powder feeding roller gear, the stirring frame gear and the developing coupling 1061, so that the driving assembly can be protected. Specifically, the developing box cover 1093 is provided with a cylindrical portion protruding on a side away from the developing frame 125, the cylindrical portion is hollow, an axial direction thereof extends in a longitudinal direction of the developing frame 125, and a part of the developing coupling 1061 extends from the cylindrical portion to the outside of the developing box cover 1093.

As shown in fig. 13 and 14, the process cartridge 100 further includes end caps provided at both ends of the process cartridge 100 in the longitudinal direction, which are a driving-side end cap 116 and a conductive-side end cap 117, respectively, the conductive-side end cap 1095 being provided outside the conductive-side end cap 1092, the driving-side end cap 116 being provided outside the developing box cap 1093, and the driving-side end cap 116 and the developing box cap 1093 being at least partially overlapped as viewed in the longitudinal direction of the process cartridge 100. The driving-side end cap 116 and the conductive-side end cap 117 cover at least a portion of the ends of the drum holding frame 115 and the developing frame 125, respectively. The driving-side end cap 116 is fixedly connected to an end of the drum holding frame 115.

In the present embodiment, the driving-side end cap 116 is provided with a first through hole through which a portion of the drum coupling 143 is exposed and a second through hole through which a portion of the developing coupling 1061 is exposed when the driving-side end cap 116 is mounted on the ends of the developing frame 125 and the drum holding frame 115, so that the coupling is engaged with the driving head of the electrophotographic apparatus M to receive driving force.

As shown in fig. 15 to 20, the drum coupling 143 is provided at an end portion of the photosensitive drum 104 in the longitudinal direction (axial direction), and the drum coupling 143 and the developing coupling 1061 are preferably located at the same end of the process cartridge 100 in the longitudinal direction. The drum coupling 143 is for receiving the driving force of the electrophotographic apparatus M (transmitted through the driving force transmitting member 180) to thereby rotate the photosensitive drum 104, and in the present embodiment, the drum coupling 143 is configured not to receive the braking force. Specifically, the drum coupling 143 includes a mounting portion 1431, a grip portion 1432, a jack 1433, a rotary member 1434, a second moving member 1435, a third moving member 1436, and a third elastic member 1437.

As shown in fig. 17 to 20, the mounting portion 1431 is fixedly disposed at an axial end portion of the photosensitive drum 104, the mounting portion 1431 is a fixed sleeve, the mounting portion 1431 is coaxially disposed with the photosensitive drum 104 and seals the end portion of the photosensitive drum 104, the mounting portion 1431 has a cavity therein, and the first cavity 14316 and the second cavity 14317 are sequentially disposed along the M1B direction, that is, the first cavity 14316 is closer to the outer side of the photosensitive drum than the second cavity 14317, and the diameter of the first cavity 14316 is greater than the diameter of the second cavity 14317, so that a step portion is formed at a junction of the first cavity 14316 and the second cavity 14317. Preferably, the first cavity 14316 is a circular cavity and the second cavity 14317 is a square cavity. Or in some other embodiments, the first and second chambers 14316, 14317 may be other shapes as long as no relative slip occurs between the second moving member 1435 and the mounting portion 1431 when the driving force is transmitted.

The lower end (one end in the M1B direction) of the third moving member 1436 is inserted into the first chamber 14316, the lower end of the third moving member 1436 has a shape that is adapted to the first chamber 14316, and the lower end of the third moving member 1436 abuts against the step portion of the mounting portion 1431 when the process cartridge 100 is mounted on the electronic imaging device M in the initial position (the position where the respective members of the process cartridge 100 are located before the door cover 11 is closed). The third movable member 1436 is a barrel having a third cavity therein

14361, The third chamber 14361 communicates with the second chamber 14317 when the third movable member 1436 is mounted on the mounting portion 1431. The third moving member 1436 has a first protrusion 14362 provided on an outer surface of an upper end (one end in the M1A direction), a first cutout portion 14363 provided on the first protrusion 14362, and the first cutout portion 14363 has a first inclined surface 14364. The first protrusions 14362 may be provided in plurality, and in the present embodiment, the number of the first protrusions 14362 is two, and in some other embodiments, three, four, etc. may be provided, which are not limited herein; the outer surfaces of the first protrusions 14362 are arc surfaces, the outer surfaces of the plurality of first protrusions 14362 are in the same annular surface, and an inner annular protrusion 14365 is formed on the inner wall of the lower end of the third moving part 1436.

The rotating piece 1434 is a cylindrical member and is sleeved on the outer side of the third moving part 1436, the inner wall of the rotating piece 1434 is attached to the outer surface of the first protrusion 14362, the second protrusion 14341 is arranged on the inner wall of the rotating piece 1434, the second protrusion 14341 is provided with a shape matched with the first notch 14363, the second protrusion 14341 is provided with a second inclined surface 14342, and the number of the second protrusions 14341 on the rotating piece 1434 is matched with the number of the first protrusions 14362; when the rotating member 1434 is assembled with the third moving member 1436, the second protrusion 14341 is inserted into the first notch portion 14363 of the first protrusion 14362, and the second inclined surface 14342 is attached to the first inclined surface 14364. The rotating member 1434 is rotatable relative to the third moving member 1436, and when the rotating member 1434 rotates, the second inclined surface 14342 has a pressing force on the first inclined surface 14364, thereby pushing the third moving member 1436 to move in the axial direction (M1 direction).

The second moving member 1435 includes a trapezoidal portion 14351, a first round table portion 14352, a second round table portion 14353, a first lever portion 14354, and a hook portion 14355 that are sequentially provided in the M1B direction, and a fourth chamber 14356 is provided in the trapezoidal portion 14351, the first round table portion 14352, the second round table portion 14353, and the first lever portion 14354, which communicate with each other, and a radial width of an upper end (one end in the M1A direction) of the trapezoidal portion 14351 is smaller than a radial width of a lower end (one end in the M1B direction) thereof, so that an outer surface of the trapezoidal portion 14351 is a surface inclined with respect to the axial direction. The diameter of the first round platform portion 14352 is larger than that of the second round platform portion 14353, the outer diameter of the first rod portion 14354 is smaller than that of the second round platform portion 14353, the first rod portion 14354 is in a shape (preferably square) matched with the second cavity 14317, the first rod portion 14354 is provided with an avoidance groove 14357 penetrating through the first rod portion 14354 in the radial direction, and the avoidance groove 14357 is a strip-shaped groove extending along the axial direction. During assembly, the first rod portion 14354 is sequentially inserted into the third cavity 14361 and the second cavity 14317, the first rod portion 14354 is attached to the third cavity 14361, the first round platform portion 14352 is abutted against the inner annular protrusion 14365 of the third moving component 1436, so that driving connection is achieved, and the second moving component 1435 can be driven to move when the third moving component 1436 moves. In the initial position, the second truncated cone 14353 is in contact with the stepped portion of the mounting portion 1431. The hook 14355 is disposed at a lower end (one end in the M1B direction) of the second moving member 1435, and the hook 14355 is connected to one end of the third elastic member 1437, and the third elastic member 1437 is preferably a tension spring for providing a restoring force to the second moving member 1435.

The ejector rod 1433 comprises a third round platform part 14331, a connecting part 14332 and a second rod part 14333, a concave part is arranged in the middle of the upper end of the third round platform part 14331, the connecting part 14332 is arranged at the lower end of the third round platform part 14331 and is positioned at the edge of the third round platform part 14331, and the connecting part 14332 is used for being connected with the grabbing part 1432. The second rod portion 14333 is connected to the lower end of the third round table portion 14331 and is located at the center of the third round table portion 14331, the second rod portion 14333 has a shape (preferably square shape) adapted to the fourth cavity 14356, and a through hole penetrating the second rod portion 14333 in the radial direction is provided at the lower end (one end along the direction M1B) of the second rod portion 14333. During assembly, the second rod portion 14333 of the rod 1433 is inserted into the fourth cavity 14356, and the rod 1433 is fixedly connected to the mounting portion 1431 by sequentially passing through the side wall of the second cavity 14317 of the mounting portion 1431, the escape groove 14357 of the second moving member 1435, and the through hole of the second rod portion 14333 through the first connecting member 14334. The first connector 14334 is preferably a pin. Since the escape groove 14357 is a bar-shaped groove, the second moving member 1435 can still move in the axial direction after the first connecting piece 14334 passes through the escape groove 14357.

In this embodiment, the second cavity 14317 of the mounting portion 1431, the second rod portion 14333 of the ejector rod 1433, and the third cavity 14361 of the third moving component 1436 are configured to be square and cooperatively connected, so that relative rotation of the above components can be avoided, and stable transmission of driving force is ensured.

As shown in fig. 17 to 20, the grip portion 1432 includes at least two gripping claws rotatably provided on the circumferential side of the jack 1433. In this embodiment, preferably, the number of the clamping jaws is two, specifically, on the connecting portion 14332 of the ejector rod 1433, the number of the connecting portion 14332 is adapted to the number of the clamping jaws, and is also two, the two connecting portions 14332 are axisymmetrically arranged on the third round platform portion 14331, the two clamping jaws are rotationally connected to the connecting portion 14332, and the two clamping jaws can be oppositely arranged; one end (one end along the M1A direction) of the clamping jaw is provided with a working surface for grabbing the driving force transmission member 180, and the working surface is subjected to surface treatment of rubber coating and injection molding, so that grabbing of the working surface is more stable, and the other end of the clamping jaw is abutted with a trapezoid part 14351 arranged on the ejector rod 1433; the outside of clamping jaw other end (along the one end of M1B direction) passes through rubber ring 1438 fastening, makes the other end of clamping jaw remain throughout with trapezoidal portion 14351 butt, and the middle part of clamping jaw articulates on connecting portion 14332 through second connecting piece 14327, makes the clamping jaw can regard second connecting piece 14327 as the axle center rotation, and when the clamping jaw rotates, its one end along the M1A direction is opposite with the motion along one end of M1B direction, and when two clamping jaws one end along the M1B direction kept away from each other, two clamping jaws one end along the M1A direction were close to each other.

As shown in fig. 13 to 16, the process cartridge 100 further includes a push rod 350, the push rod 350 being capable of receiving a force thereof (a force applied by the first pressing mechanism) when the process cartridge 100 is mounted to the electronic imaging device M, and the push rod 350 being connected to the rotary 1434 through a linkage assembly.

As shown in fig. 15 and 16, the push rod 350 is a rod or bar, and the push rod 350 is movable relative to the developing frame 125. Specifically, the push rod 350 is movably disposed between the driving side bearing 1091 and the developing box cover 1093, the push rod 350 has a pressing portion 351 at an upper portion thereof and a force receiving protrusion 352 at a lower portion thereof, an engagement lever 353 is provided at a middle portion thereof, and at least a portion of the pressing portion 351 protrudes from the driving side bearing 1091 and the upper portion of the developing box cover 1093, so that when the process cartridge 100 is mounted to the electronic image forming apparatus M, the pressing portion 351 can be pressed by a first pressing mechanism in the electronic image forming apparatus M, so that the entire push rod 350 moves downward with respect to the developing frame 125, and further the force receiving protrusion 352 at a lower end of the push rod 350 moves to a position to cooperate with the developing separation control unit of the electronic image forming apparatus M. The force receiving projection 352 is provided on the push rod 350, and before the force of the first pressing mechanism is not received, the force receiving projection 352 is at a position where it cannot cooperate with the developing separation control unit, so that damage caused by interference and collision of the force receiving projection 352 with the developing separation control unit during the mounting of the process cartridge 100 can be avoided.

As shown in fig. 15, a guide groove 354 extending in the up-down direction may be provided on the push rod 350, and a guide post matched with the guide groove 354 may be provided on the developing box cover 1093, and when the developing box cover is installed, the guide post is inserted into the guide groove 354, so that the movement of the push rod 350 can be guided and limited. Alternatively, a guide post may be provided on the push rod 350, and a guide groove 354 may be provided on the developing cartridge cover 1093 or the driving side bearing 1091, to achieve the same effect.

As shown in fig. 15 and 17, an engagement lever 353 on the push rod 350 is used to mate with the linkage assembly. Specifically, the linkage assembly includes a ring lever 361 and a link lever 362, the ring lever 361 having a first hole 3611, a second hole 3612, and a third hole, the ring lever 361 being sleeved outside the developing coupling 1061 through the first hole 3611, being connected to the engagement lever 353 of the push rod 350 through the second hole 3612, being connected to a first bump at one end of the link lever 362 through the third hole, and a second bump at the other end of the link lever 362 being connected to a fourth hole on the outer surface of the rotary 1434; when the push rod 350 receives the driving force of the first pressing mechanism to move, the ring lever 361 can be driven to rotate, the rotating motion of the ring lever 361 drives the connecting rod 362 to translate, and the connecting rod 362 translates to further drive the rotating piece 1434 to rotate.

As shown in fig. 15 to 20, when the process cartridge 100 is mounted in place in the electronic imaging device M and the door cover 11 of the electronic imaging device M is closed, the first pressing mechanism provided in the electronic imaging device M presses the pressed portion 351 of the push rod 350, causing the push rod 350 to move downward as a whole, while driving the ring lever 361 to rotate in the clockwise direction, driving the link 362 to move upward when the ring lever 361 rotates, and driving the rotary member 1434 to rotate counterclockwise when the link 362 moves upward.

Simultaneously with the closing operation of the door cover 11 of the electronic imaging device M, the driving force transmitting member 180 protrudes in the direction approaching the process cartridge 100 (in the direction M1B), the positioning boss 180i of the driving force transmitting member 180 abuts against the concave portion of the ejector 1433, and the coupling engaging portion 208B of the second brake engaging member 208 is pressed against by the ejector 1433. At this time, the driving force transmission member 180 moves into position.

When the rotating piece 1434 rotates, the second inclined surface 14342 has a pushing force on the first inclined surface 14364 of the third moving part 1436, and can push the third moving part 1436 to move in a direction (in the M1A direction) approaching the driving force transmission member 180; when the third moving means 1436 moves, the second moving means 1435 abutting against the third moving means 1435 can be driven to move in a direction approaching the driving force transmission member 180 in synchronization; the clamping jaws slide relatively on the trapezoid part 14351 on the second moving part 1435, and the trapezoid part 14351 pushes to rotate around the second connector 14327, so that the working surfaces of the two clamping jaws are close to each other, the driving force transmission member 180 is clamped, the drum coupler 143 and the driving force transmission member 180 are clamped, the driving force of the driving force transmission member 180 can be transmitted to the drum coupler 143, and the photosensitive drum 104 is driven to rotate. The third elastic member 1437 is stretched while the second moving member 1435 moves.

When the door cover 11 of the electronic imaging device M is opened again, the force acting on the push rod 350 by the first pressing mechanism of the electronic imaging device M disappears, the push rod 350 moves upward to drive the ring lever 361 to rotate reversely (rotate anticlockwise), the ring lever 361 drives the link 362 to move downwards, the link 362 drives the rotator 1434 to rotate clockwise, the pushing force of the second inclined surface 14342 of the rotator 1434 on the third moving part 1436 disappears, the acting force of the third moving part 1436 on the second moving part 1435 disappears, and the second moving part 1435 moves towards the direction of M1B under the action of the elastic restoring force of the third elastic part 1437 to drive the third moving part 1436 abutting against the second moving part to move together to return to the initial position; the clamping jaw slides relatively to the trapezoid part 14351 of the second moving part 1435 and is tightly attached to the trapezoid part 14351 under the action of the fourth elastic piece (namely, the rubber ring), so that when the second moving part 1435 moves towards the direction M1B, the clamping jaw rotates under the action of the fourth elastic piece, the working surfaces of the clamping jaw are far away from each other (the two clamping jaws open), and the driving force transmission member 180 is not gripped any more, namely, the driving force transmission member 180 is released. Simultaneously with the opening of the door cover 11, the driving force transmitting member 180 is moved in a direction away from the process cartridge 100 (in the M1A direction), and the positioning boss 180i and the coupling engagement portion 208b of the second brake engagement member 208 are separated from the jack 1433.

As shown in fig. 11 and 20, in the present embodiment, the plunger 1433 presses the positioning boss 180i of the driving force transmitting member 180 and the coupling engagement portion 208b of the second brake engagement member 208, and the engagement portion 204b of the first brake engagement member 204 moves integrally with the coupling engagement portion 208b of the second brake engagement member 208, and therefore, when the second brake engagement member 208 is pressed, the first brake engagement member 204 is also pressed at the same time, and abnormal noise can be prevented from being generated during rotation of the driving force transmitting member 180.

The push rod 350 of the present embodiment is also used for a contact or separation structure of the developing roller 106 and the photosensitive drum 104, and the force receiving protrusion 352 provided at the lower end of the push rod 350 is used to cooperate with a developing separation control unit of the electronic imaging device M, so as to drive the developing unit 109 to rotate relative to the drum unit 108, and further contact or separate the developing roller 106 and the photosensitive drum 104.

Specifically, when the electronic image forming apparatus M is not in operation, the development separation control unit moves rightward under the control of the electronic image forming apparatus M, and moves together by a certain distance after abutting against the force receiving projection 352, and the force receiving projection 352 drives the entire development unit 109 to rotate in the counterclockwise direction with the axis of the development coupling 1061 as the rotation center, so that the development roller 106 and the photosensitive drum 104 are separated.

When the development work is restarted, the development separation control unit moves leftward, and the development separation control unit moves together by a certain distance after abutting against the force receiving projection 352, and the force receiving projection 352 drives the entire development unit 109 to rotate clockwise with the axis of the development coupling 1061 as the rotation center, so that the development roller 106 and the photosensitive drum 104 are brought into contact, and development work can be performed.

Since the push rod 350 is required to swing left and right when participating in the drum-roller separation operation, the second hole 3612 connecting the push rod 350 of the ring lever 361 is provided with a triangle shape, so that a space is reserved for the left and right swinging of the push rod 350, and the influence on the position of the ring lever 361 when the push rod 350 swings left and right can be avoided.

The drum coupling 143 provided in the process cartridge 100 of this embodiment can solve the problems of unstable connection and unsmooth driving force transmission between the photosensitive drum 104 and the driving force transmission member 180 of the electronic imaging device M in the existing process cartridge 100, achieves the effects of stable driving connection and smooth driving force transmission, and improves the quality of the process cartridge 100.

In this embodiment, the structure of the electronic imaging device M is the same as that of the first embodiment, and will not be described here.

Example III

As shown in fig. 21 to 25, another process cartridge 100 is provided in the present embodiment, which differs from the first embodiment in that: in the present embodiment, the drum coupling 143 is different in structure.

As shown in fig. 21 to 25, in the present embodiment, the drum coupling 143 includes a mounting portion 1431, a catching portion 1432, a first moving member 1438, a first elastic member 1439, and a second elastic member 1430.

As shown in fig. 22 and 24, a mounting portion 1431 is provided at one end of the photosensitive drum 104, and preferably, the mounting portion 1431 may be integrally formed with the photosensitive drum 104, and a mounting groove recessed inward (recessed in the M1B direction) is provided on an end surface of the mounting portion 1431, the mounting groove including a first groove 14313 at a center position and a second groove 14314 around the first groove 14313, the first groove 14313 and the second groove 14314 communicating with each other. The notch of the first groove 14313 is provided with a limiting portion 14315, and the limiting portion 14315 may be a sheet member/plate member/block member extending from the inner wall of the first groove 14313 toward the center, and the number of the sheet member/plate member/block member is at least one, preferably two in this embodiment, and the number of the second grooves 14314 is two, symmetrically disposed on both sides of the first groove 14313 in the radial direction.

The grabbing portion 1432 includes at least two grabbing rods 14322 and at least two grabbing pieces 14323, the grabbing rod 14322 is a curved rod, the middle position of the grabbing rod 14322 is a bending position, a connecting structure is formed at the bending position, so that the grabbing rod 14322 is rotatably arranged in the second groove 14314, specifically, the connecting structure at the bending position of the grabbing rod 14322 is a connecting hole, the connecting structure is rotatably connected to the notch position of the second groove 14314 through a pin passing through the connecting hole, one part of the grabbing rod 14322 is located in the second groove 14314, the other part of the grabbing rod 3826 is located outside the second groove 14314, the grabbing rod 14322 can swing in the second groove 14314 by taking the pin as an axis, and one end of the grabbing rod 14322 in the second groove 14314 and one end of the grabbing rod 14322 outside the second groove 14314 have opposite movement tracks. Alternatively, the connection structure may be a protrusion, and a groove matched with the protrusion is disposed at the notch of the second groove 14314, so that the rotation connection of the grab bar 14322 can be realized.

The grabbing piece 14323 is an arc-shaped block/plate-shaped member, the two grabbing pieces 14323 are respectively fixed at one end of the grabbing rod 14322 located outside the second groove 14314 in an intrados surface opposite mode, and when the two grabbing rods 14322 rotate, the two grabbing pieces 14323 are driven to approach or separate. The intrados is also a working surface of the gripping member 14323, and is used for gripping the positioning boss 180i of the driving force transmission member 180, and the working surface may be subjected to surface treatment of encapsulation and injection molding, so that the gripping of the working surface is more stable.

The first moving member 1438 is movably disposed in the first slot 14313, the first moving member 1438 includes a tapered portion 14381 and a columnar portion 14382, the columnar portion 14382 is located outside (on one side in the M1A direction) the tapered portion 14381, the tapered portion 14381 is located in the first slot 14313 and is limited by the limiting portion 14315 and cannot escape from the first slot 14313, the columnar portion 14382 can protrude outward through the limiting portion 14315, and a diameter of an end of the tapered portion 14381 close to the outside (an end in the M1A direction) is larger than a diameter of an end thereof close to the inside (an end in the M1B direction). And the first moving member 1438 is located between the two grasping rods 14322 of the grasping portion 1432, and the portions of the two grasping rods 14322 located in the second groove 14314 are both abutted against the outer surface of the tapered portion 14381.

The first elastic member 1439 is defined between the groove bottom of the first groove 14313 and the tapered portion 14381 in the axial direction, the first elastic member 1439 being configured to hold the first moving member 1438 at an initial position where the tapered portion 14381 abuts against the stopper portion 14315 in the absence of an external force (a position where the process cartridge 100 is mounted on the electronic imaging device M and the respective members of the process cartridge 100 are located before the door cover 11 is closed); when the first elastic member 1439 receives an external force to move along the direction M1B, the first elastic member 1439 is compressed, the first elastic member 1439 is preferably a compression spring, the bottom of the first groove 14313 is provided with a mounting protrusion, one end of the first elastic member 1439 is sleeved with the mounting protrusion, the cone-shaped portion 14381 can also be provided with the mounting protrusion, and the other end of the first elastic member 1439 is sleeved with the mounting protrusion of the cone-shaped portion 14381; the first elastic member 1439 may be elastic rubber, elastic sponge, spring piece, or other members capable of providing elastic force.

The second elastic member 1430 is configured to press a portion of the grasping rod 14322 located in the second groove 14314 against the outer surface of the tapered portion 14381. Specifically, one end of the second elastic member 1430 abuts against a portion of the grasping rod 14322 located in the second groove 14314 on a side facing away from the tapered portion 14381, and the other end abuts against a groove wall of the second groove 14314, so that the grasping rod 14322 is forced in the radial direction, and the portion located in the second groove 14314 is always abutted against the tapered portion 14381. The second elastic member 1430 is preferably a compression spring, and the grip lever 14322 and/or the second groove 14314 may be provided with a mounting protrusion to which the second elastic member 1430 is mounted. Alternatively, the second elastic member 1430 may be a rubber band, and the outer sides of the two grasping rods 14322 are fastened by the rubber band so as to be closely attached to the tapered portion 14381.

When the process cartridge 100 is mounted in place in the electronic image forming apparatus M and the door cover 11 of the electronic image forming apparatus M is closed, the driving force transmitting member 180 protrudes in a direction approaching the process cartridge 100 (in the direction of M1B), at this time, the positioning boss 180i of the driving force transmitting member 180 abuts against the columnar portion 14382 of the first moving part 1438 and forces the first moving part 1438, the first moving part 1438 is pressed inward (the first moving part 1438 moves in the direction of M1B), at the same time, the first elastic piece 1439 is compressed, the gripper bar 14322 rotates about the axis of the pin with the movement of the first moving part 1438, one ends of the two gripper bars 14322 located in the second groove 14314 are moved away from each other (while compressing the second elastic piece 1430), and the grippers 14323 located on one end of the gripper bar 14322 outside the second groove 14314 are moved toward each other, clamping the positioning boss 180i of the driving force transmitting member 180, thereby achieving engagement with the driving force transmitting member 180 and positioning the axis of each other, and thus enabling stable transmission of the driving force, driving drum 104 to rotate.

As shown in fig. 21 to 25, when the door cover 11 of the electronic imaging device M is opened again, the driving force transmitting member 180 is retracted in a direction away from the process cartridge 100 (in the direction of M1A), while the pressing force of the positioning boss 180i against the first moving part 1438 is gradually disappeared, the first moving part 1438 is pushed to move to the initial position abutting against the stopper 14315 in the direction of M1A by the elastic restoring force of the first elastic member 1439, while the grasping rod 14322 is rotated to the initial position with the movement of the first moving part 1438 due to the urging force of the second elastic member 1430 to the grasping rod 14322, and the two grasping pieces 14323 are moved away from each other (the two grasping pieces 14323 are opened) and are no longer in the position to clamp the positioning boss 180 i.

In this embodiment, the other structures of the process cartridge 100 are the same as those in the first embodiment, and will not be described here.

Example IV

As shown in fig. 26 to 31, another process cartridge 100 is provided in the present embodiment, which differs from the first embodiment in that: in the present embodiment, the drum coupling 143 in the process cartridge 100 is different from that in the first embodiment.

As shown in fig. 26 to 31, the drum coupling 143 includes a mounting portion 1431 and a catching portion 1432 mounted on the mounting portion 1431, the mounting portion 1431 is configured to be connected to the photosensitive drum 104, the catching portion 1432 is configured to be mounted on the process cartridge 100 in the electrophotographic apparatus M for clamping the drum coupling 143 to the driving force transmitting member 180, so that the electrophotographic apparatus M can transmit the driving force to the drum coupling 143 to drive the photosensitive drum 104 to rotate, and in this embodiment, the catching portion 1432 clamps the driving force transmitting member 180 to receive only the driving force and not to receive the braking force of the driving force transmitting member 180.

The mounting portion 1431 has a cylindrical shape, one end of the mounting portion 1431 is connected to the photosensitive drum, the other end far from the photosensitive drum 104 has an annular surface 1431a, a circular disk 1431b is provided on an inner peripheral wall thereof, second grooves 1431a1 are provided on the annular surface 1431a and the circular disk 1431b at intervals, the second grooves 1431a1 have an L shape, the second grooves 1431a1 are provided in plurality, preferably, the second grooves 1431a1 are provided in four, or in some other embodiments, the second grooves 1431a1 may be provided in three, five, etc., without limitation, the four second grooves 1431a1 equally divide the drum coupling 143 into four fan shapes; the side surface of the second groove 1431a1 is provided with small round holes 1431a2, and one second groove 1431a1 is provided with two small round holes 1431a2 which are oppositely arranged; and a large circular hole 1431b1 is provided in the center of the disc 1431b, the large circular hole 1431b1 penetrating the mounting portion 1431.

The catching portion 1432 includes a movable member 14325, a movable supporting portion 14324 supporting the movable member 14325, and an elastic member 3.

Referring to fig. 26, the movable support 14324 is centrally provided with a cylinder 14324c, i-shaped support members 14324a and fan-shaped planes 14324b connected to the support members 14324a are equally spaced around the circumference of the cylinder 14324c, the fan-shaped planes 14324b are perpendicular to the cylinder 14324c, the support members 14324a are preferably provided in four, corresponding fan-shaped planes 14324b are also provided in four, the four fan-shaped planes 14324b form a substantially circular plane around the cylinder 14324c, the annular array of support members 14324a are provided on a substantially circular plane formed by the four fan-shaped planes 14324b, and in some other embodiments, the support members may be provided in 2, 6, 8 or more; the support component 14324a has two opposite planes 14324a1 and 14324a2, which are connected by a connecting shaft 14324a3, and the cylinder 14324c of the movable support portion 14324, the support component 14324a and the fan-shaped plane 14324b can be integrally formed or can be mutually clamped.

The movable member 14325 is movably mounted on the movable support part 14324, and the movable member 14325 can be movably mounted on the mounting part 1431 to rotate on the mounting part 1431. Specifically, the movable member 14325 is disposed corresponding to the support assemblies 14324a, the number of which is identical to that of the support assemblies 14324a, and the movable member 14325 has an inclined plane 14325a extending along the axial direction of the drum coupling 143 and a plane 14325b extending along the radial direction of the drum coupling 143, and the angle between the two planes is greater than 90 degrees; the end of the plane 14325b away from the plane 14325a is provided with a second groove 14325b2 which is engaged with the connecting shaft 14324a3 of the supporting component 14324a, and the second groove 14325b2 can rotate around the connecting shaft 14324a 3; and the flat surface 14325b is further provided with circular protrusions 14325b1 on opposite sides near the inclined flat surface 14325a, and when the grip portion 1432 is mounted on the drum coupling 143, the circular protrusions 14325b1 are engaged with the small circular holes 1431a2 in the second recess 1431a1 on the mounting portion 1431 to rotate.

Further, in order to prevent the second groove 14325b2 of the movable member 14325 from being separated from the coupling shaft 14324a3, a locking portion, a rib or other structures may be provided in the second groove 14325b 2.

The elastic member 3 is provided between the mounting portion 1431 (the photosensitive drum 104) and the movable supporting portion 14324, and is used to bring the movable supporting portion 14324 into abutment with the mounting portion 1431. Specifically, the elastic member 3 is fitted over the cylinder 14324c of the movable support 14324, has one end abutting against the movable support 14324 and the other end abutting against the photosensitive drum 104, and is elastically movable therebetween to generate an axial elastic force on the movable support 14324.

As shown in fig. 26 and 31, when the engaging portion 1432 is assembled with the mounting portion 1431, the portion of the cylinder 14324c of the movable supporting portion 14324 located at the upper end of the fan-shaped plane 14324b passes through the large circular hole 1431b1 in the center of the mounting portion 1431 and protrudes from the disc 1431b, the inclined plane 14325a of the movable member 14325 protrudes from the second groove 1431a1 from inside to outside and protrudes from the mounting portion 1431, and at this time, the upper end surfaces of the two planes 14324a1 and 14324a2 of the supporting member 14324a are abutted with the lower end surface of the disc 1431b, and the elastic member 3 is sleeved on the portion of the cylinder 14324c located at the lower end of the fan-shaped plane 14324b, so that the elastic member 3 is stably supported between the photosensitive drum 104 and the mounting portion 1431.

The working process comprises the following steps:

the door cover 11 of the main assembly 170 is closed, and the driving force transmitting member 180 of the driving force transmitting unit 203 of the main assembly 170 is extended and approaches the drum coupling 143 of the drum unit 108 in the direction M1B.

As shown in fig. 30 and 31, the reinforcing cylindrical portion 180e of the driving force transmitting member 180 is inserted into the drum coupling 143, and abuts or contacts the inner peripheral wall of the annular surface 1431a of the drum coupling 143 mounting portion 1431, preventing the driving force transmitting member 180 from being displaced.

At the beginning, the positioning boss 180i on the driving force transmission member 180 is not in contact with the cylinder 14324c of the movable supporting portion 14324 protruding from the disc 1431b through the large circular hole 1431b1 in the center of the mounting portion 1431, and the catching portion 1432 is in a normal state; when the driving force transmitting member 180 is fully engaged with the drum coupling 143, the positioning boss 180i thereon abuts against the cylinder 14324c in the direction of M1B, pushing the cylinder 14324c on the movable support portion 14324 to move in the direction of M1A, the elastic means 3 is compressed, the upper end faces of the two flat faces 14324a1 and 14324a2 on the support assembly 14324a are disengaged from the lower end face of the disc 1431B, the connecting shaft 14324a3 on the support assembly 14324a also moves in the direction of M1A, and the movable piece 14325 is driven to move, specifically, the movable piece 14325 rotates through the small circular hole 1431A2 of the circular boss 14325B1 in the second groove 1431A1 on the mounting portion 1431, the flat face 14325B of the movable piece 14325 is inclined, and the inclined flat face 14325a connected with the flat face 14325B moves in the direction approaching the driving force transmitting member 180 and abuts against the reinforced cylindrical portion 180e on the driving force transmitting member 180.

With the rotation of the driving force transmission unit 203 and the driving force transmission member 180 thereon, the cylinder 14324c is stably abutted with the positioning boss 180i on the driving force transmission member 180 under the bidirectional action of the elastic component 3 and the driving force transmission member 180, the catching portion 1432 completely locks the reinforcing cylindrical portion 180e, specifically, the inclined plane 14325a on the movable piece 14325 is tightly caught by the reinforcing cylindrical portion 180e, that is, the movable piece 14325 is through the catching of the driving force transmission member 180, so that the driving force is transmitted to the catching portion 1432 and further to the drum coupling 143, and finally the driving force transmission between the driving force transmission unit 203 and the drum coupling 143 is realized.

The process cartridge 100 of the present embodiment is structured such that the engagement of the driving force transmitting member 180 with the drum coupling 143 of the process cartridge 100 is more stable, the disengagement is less likely, and the power transmission is more stable. In addition, since the process cartridge 100 in this embodiment does not receive the braking force applied by the electronic image forming apparatus M during the process of receiving the driving force, the process cartridge 100 can be provided with more rotating members or cleaning devices in contact with the photosensitive drum 104, and has a certain general performance without the drawbacks of insufficient power.

In this embodiment, the process cartridge 100 and the drive transmission unit 203 are the same as those in the first embodiment, and will not be described here.

Example five

As shown in fig. 32 to 37, another process cartridge 100 is provided in the present embodiment, which differs from the first embodiment in that: the structure of the process cartridge 100 in this embodiment is different from that of the first embodiment in that the process cartridge 100 includes a drum unit 108, the drum unit 108 including a drum holding frame 115, a photosensitive drum 104 rotatably provided on the drum holding frame 115, and a drum coupling 143 provided on a driving side of the drum holding frame 115 for transmitting a driving force from a driving force transmitting member 180 of the electrophotographic apparatus M to the photosensitive drum 104.

The process cartridge 100 further includes a driving-side end cap 116 fixed on the driving side, and a non-driving-side end cap 117 fixed on the non-driving side, since the drum holding frame 115, the driving-side end cap 116, and the non-driving-side end cap 117 are fixedly connected to each other, which is schematically illustrated as an integral structure in the drawing, specifically, the photosensitive drum 104 is rotatably provided on the drum holding frame 115, the drum coupling 143 is provided on the driving side of the drum holding frame 115 for engagement with the driving force transmitting member 180 of the driving force transmitting unit 203 to receive the driving force of the electronic imaging device M, and in the present embodiment, the drum coupling 143 is configured not to receive the braking force of the electronic imaging device M.

Referring to fig. 34 to 37, the drum coupling 143 includes a connection shaft 1471, a link 1472, a return elastic member 1473, a shaft pushing device, and a catching portion 1432.

Wherein the connecting shaft 1471 is rotatably provided on the drum holding frame 115, and has an input end protruding out of the drum holding frame 115 for receiving a driving force of the electrophotographic apparatus M, and an output end connected to an end of the photosensitive drum 104 for transmitting the driving force to the photosensitive drum 104. Specifically, referring to fig. 36, the output end of the connection shaft 1471 is provided with a movement mounting hole 14712 so that a protrusion of the end of the photosensitive drum 104 can be inserted into the movement mounting hole 14712, and the connection shaft 1471 can be moved between an extended position and a contracted position in the axial direction with respect to the protrusion of the end of the photosensitive drum 104, and a first annular groove 14711 is provided on the circumferential surface of the input end of the connection shaft 1471, and a second annular groove 14713 is provided on the circumferential surface of the middle portion of the connection shaft 1471.

A link 1472 is movably provided on the drum holding frame 115 for receiving a closing force of the electronic imaging device M, specifically, a force generated when the process cartridge 100 is mounted into the electronic imaging device M and then the door cover 11 of the electronic imaging device M is closed. In the present embodiment, a link 1472 is vertically provided on the drum holding frame 115, a first end of which is for receiving a closing force of the electrophotographic apparatus M, and a second end of which is connected to a first member 14741 (described in detail below) and pushes the first member 14741 to rotate.

Further, a return elastic member 1473 is provided between the link 1472 and the drum holding frame 115 for return of the link 1472. Specifically, the return elastic member 1473 may be a spring connected between the link 1472 and the drum holding frame 115, and when the door cover 11 of the electronic imaging device M is closed, the link 1472 moves downward receiving the closing force applied by the electronic imaging device M, and when the door cover 11 of the electronic imaging device M is opened, the closing force applied to the link 1472 disappears, and the link 1472 is movable upward to return by the action of the return elastic member 1473.

The shaft pushing device is mounted on the connecting shaft 1471, and can drive the connecting shaft 1471 to move along the axial direction according to the acting force of the connecting rod 1472. In the present embodiment, the shaft pushing device includes a first member 14741, a second member 14742, and a shaft pushing elastic piece 14743, the first member 14741 being rotatably sleeved on the connecting shaft 1471 and connected to the connecting rod 1472 without moving in the axial direction on the connecting shaft 1471, for converting the up-and-down movement of the connecting rod 1472 into a rotational movement; in this embodiment, the first member 14741 has a circular shape, and the end surface thereof is provided with a first inclined portion 147411. The second member 14742 is rotatably sleeved on the second annular groove 14713 of the connecting shaft 1471, such that the second member 14742 can be axially linked with the connecting shaft 1471, but is not rotationally linked, i.e., the second member 14742 does not rotate along with the connecting shaft 1471, but can drive the connecting shaft 1471 to axially move, and the second member 14742 abuts against the first member 14741 for converting the rotational movement of the first member 14741 into axial movement. In this embodiment, the second member 14742 is annular, and the end surface of the second member 14742 is provided with a second inclined portion 147421, and the second inclined portion 147421 abuts against the first inclined portion 147411, so that when the first member 14741 rotates, the first inclined portion 147411 acts on the second inclined portion 147421, thereby pushing the second member 14742 to move in the axial direction. The first and second inclined portions 147411, 147421 may be straight inclined surfaces, or may be arcuate inclined surfaces or other shapes, so long as conversion of rotational movement of the first member 14741 into axial movement of the second member 14742 is enabled. The shaft pushing elastic piece 14743 is provided between the photosensitive drum 104 and the second member 14742, and is used for pushing the second member 14742 to axially move for reset when the axial pushing force exerted on the second member 14742 by the first member 14741 is eliminated. In this embodiment, the shaft pushing elastic member 14743 is a spring, which is sleeved on the output end of the connecting shaft 1471, and two ends of the shaft pushing elastic member are respectively abutted against the second member 14742 and the end of the photosensitive drum 104.

The catching portion 1432 is provided at the input end of the connection shaft 1471 for catching or releasing the driving force transmitting member 180 of the electronic imaging device M to be engaged with or released from the input end of the connection shaft 1471 according to the axial position of the connection shaft 1471. Referring to fig. 35 and 37, in the present embodiment, the catching portion 1432 includes at least two catching pieces 14326, which may be two, three or more catching pieces 14326, the catching pieces 14326 are uniformly distributed along the circumferential direction of the connection shaft 1471, and the catching pieces 14326 are rotatable to approach toward the central axis direction of the connection shaft 1471 (refer to the arrow of fig. 33), so as to catch and abut the driving force transmission member 180 of the electronic imaging device M with the input end of the connection shaft 1471. In this embodiment, two symmetrically disposed gripping members 14326 are provided directly above and directly below the connecting shaft 1471. Referring to fig. 37, a fixing table 14 is further provided on the outer side of the drum holding frame 115, a claw fixing lever 15 is provided on the fixing table 14, and a claw member 14326 is rotatably provided on the claw fixing lever 15 so as to be rotatable around the fixing lever 15. In the present embodiment, the number of the claw fixing bars 15 is two, which are disposed on the vertical plane of the first annular groove 14711 of the connecting shaft 1471 and are disposed in the opposite high and low positions in the horizontal direction. In this embodiment, the grabbing piece 14326 includes a claw connecting portion 143261 and a claw grabbing portion 143262, the claw connecting portion 143261 is rotatably disposed on the claw fixing rod 15, a first end thereof extends into the first annular groove 14711, a second end thereof is connected with the claw grabbing portion 143262, and when the connecting shaft 1471 is axially contracted, the claw connecting portion 143261 acts on the first annular groove 14711 to rotate around the claw fixing rod 15, so as to drive the claw grabbing portion 143262 to approach toward the central axis direction of the connecting shaft 1471, thereby realizing the grabbing action. The claw grip 143262 specifically grips an outer diameter portion of the driving force transmission member 180 of the electronic imaging device M, which is stationary, and the claw grip 143262 may be provided with an arc-shaped grip surface adapted to the driving force transmission member 180 of the electronic imaging device M to facilitate gripping.

When the process cartridge 100 of this embodiment is used, the door 11 of the electronic imaging device M is opened, the process cartridge 100 is put into the electronic imaging device M, the input end of the connecting shaft 1471 is aligned with the driving force transmitting member 180 of the electronic imaging device M, then the door 11 is closed, the pressure, that is, the closing force, is applied to the connecting rod 1472 on the process cartridge 100 when the door 11 is closed, the connecting rod 1472 moves downward, the restoring elastic member 1473 stretches, the connecting rod 1472 drives the first member 14741 to rotate, the first inclined portion 147411 of the first member 14741 pushes the second inclined portion 147421 to generate axial pushing force, the second member 14742 moves axially along the direction of M1B, the second member 14742 compresses the shaft pushing elastic member 14743, and pushes the connecting shaft 1471 to move from the extended position to the contracted position, the input end of the connecting shaft 1471 acts with the grabbing member 14326 through the first annular groove 14711, and the grabbing member 14326 grips the driving force transmitting member 180 of the electronic imaging device M axially to the input end of the connecting shaft 1471 and tightly abuts against the input shaft 104 through the photosensitive drum 104.

When the process cartridge 100 needs to be replaced, the door cover 11 of the electronic imaging device M is opened, the closing force exerted by the door cover 11 on the link 1472 is removed, the return elastic member 1473 is contracted to return the link 1472 to the upward movement, the link 1472 drives the first member 14741 to rotate and return, the axial thrust of the first inclined portion 147411 of the first member 14741 to the second inclined portion 147421 is removed, the second member 14742 is axially moved and returned due to the action of the axial thrust elastic member 14743, so that the connecting shaft 1471 returns to the extended position, the first annular groove 14711 is extended to return the catch member 14326, the driving force transmitting member 180 of the electronic imaging device M is released to be released from the input end of the connecting shaft 1471, and the driving force stops being input.

The process cartridge 100 in this embodiment, by providing the connection shaft 1471, the connection rod 1472, the shaft pushing device and the catching portion 1432, makes the driving connection between the photosensitive drum 104 and the driving force transmission member 180 of the electronic image forming apparatus M stable, the driving transmission smooth, and enhances the use quality of the process cartridge 100. In addition, since the process cartridge 100 in this embodiment does not receive the braking force applied by the electronic image forming apparatus M during the process of receiving the driving force, the process cartridge 100 can be provided with more rotating members or cleaning devices in contact with the photosensitive drum 104, and has a certain general performance without the drawbacks of insufficient power.

In this embodiment, the electronic imaging device M is the same as the one in the first embodiment, and will not be described here.

What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.

Claims

1. A drum unit detachably mountable to an electronic image forming apparatus provided with a driving force transmitting unit including a driving force transmitting member, the drum unit comprising:

a drum holding frame;

The drum coupling is provided with a catching portion provided so as to clamp a driving force transmission member of the electronic imaging device when the process cartridge is mounted to the electronic imaging device, thereby forming driving connection with the driving force transmission member.

2. A drum unit according to claim 1, wherein said catching portion is capable of being opened or clamped under the urging force of said electronic imaging device, and said catching portion clamps said driving force transmitting member to thereby form a driving connection with said electronic imaging device when said process cartridge is mounted to said electronic imaging device.

3. A drum unit according to claim 2, wherein said driving force transmitting member is provided with a reinforcing cylindrical portion at an end thereof adjacent to said photosensitive drum, said catching portion being capable of clamping said reinforcing cylindrical portion when the process cartridge is mounted to the electrophotographic apparatus.

4. A drum unit according to claim 3, wherein the catching portion is a flexible member, and the catching portion is provided with a first groove provided so that the driving force transmitting member can be caught and rotated with the first groove of the catching portion when the process cartridge is mounted to the electronic image forming apparatus, the first groove being twisted to clamp the driving force transmitting member to thereby form a driving connection with the driving force transmitting member.

5. A drum unit according to claim 4, wherein said catching portion is provided so as to be movable in a circumferential direction of said photosensitive drum, said first groove is provided with an abutment plane extending in a radial direction of said photosensitive drum, an axial plane of said driving force transmitting member is capable of abutting with said abutment plane when said process cartridge is mounted to said electrophotographic apparatus, and said driving force transmitting member is capable of driving said catching portion to move in the circumferential direction of said photosensitive drum by friction with said abutment plane, thereby twisting said first groove to clamp said driving force transmitting member.

6. A drum unit according to any one of claims 1-5, wherein the drum coupling further comprises a mounting portion provided with a projection for mounting the catch portion, the catch portion being movable relative to the projection.

7. A drum unit according to claim 6, wherein the mounting portion comprises a recess, the side wall of the recess comprises a second opening, the projection comprises a first opening, the catching portion extends through the first opening in a radial direction of the mounting portion to the second opening, and the catching portion is movable within the second opening.

8. A drum unit according to claim 7, wherein one end of said catching portion is fixedly mounted in said protruding portion, and the other end of said catching portion is movable in a circumferential direction of said photosensitive drum.

9. A drum unit according to claim 2, wherein said drum coupling further comprises a mounting portion provided at an end portion of said photosensitive drum, said catching portion comprising at least two catching bars and at least two catching pieces, and a first moving member movable in an axial direction of said photosensitive drum with respect to said mounting portion; the grabbing rod is rotatably arranged on the mounting part, and the grabbing parts are respectively arranged at one ends of the grabbing rods extending out of the mounting part; the first moving part can drive the grabbing rod to rotate when moving, so that at least two grabbing pieces are close to or far away from each other.

10. A drum unit according to claim 9, wherein the mounting portion has a mounting groove, the first moving member has a tapered portion, the tapered portion is located in the mounting groove, a notch of the mounting groove is provided with a stopper portion for preventing the tapered portion from coming out, and a side surface of the tapered portion abuts against a portion of the grab bar located in the mounting groove.

11. A drum unit according to claim 10, wherein the drum coupling further comprises a first resilient member and a second resilient member, the first resilient member being defined between the bottom of the mounting groove and the taper; the second elastic piece is used for enabling the grabbing rod to prop against the conical portion.

12. A drum unit according to claim 10, wherein said first moving member further comprises a columnar portion protruding outside said mounting groove, said columnar portion abutting against said driving force transmitting member when said process cartridge is mounted to the electronic image forming apparatus, said driving force transmitting member being movable to move the entire first moving member.

13. A drum unit according to any one of claims 9-12, wherein said driving force transmitting member is provided with a positioning boss, and said catching portion is adapted to clamp said positioning boss when the process cartridge is mounted to the electronic image forming apparatus.

14. A drum unit according to claim 3, wherein the drum coupling comprises a mounting portion, a push rod, a rotating member, a second moving member and a third moving member; the ejector rod is fixedly arranged on the mounting part, and the second moving part is sleeved outside the ejector rod and can axially move relative to the ejector rod; the third moving part is abutted with the second moving part and can drive the second moving part to move; the rotating piece is in driving connection with the third moving part, and the rotating piece can drive the third moving part to axially move when rotating.

15. A drum unit according to claim 14, wherein said grip portion comprises at least two jaws rotatably provided to said ejector pin;

One end of the clamping jaw is provided with a working surface for grabbing the driving force transmission member, and the other end of the clamping jaw is in butt joint with a trapezoid part arranged on the ejector rod.

16. A drum unit according to claim 15, wherein the drum coupling further comprises a third resilient member for providing a restoring force to the second moving member.

17. A drum unit according to any one of claims 14-16, wherein said process cartridge further comprises a push rod capable of receiving a force thereof for movement relative to said process cartridge when said process cartridge is mounted to said electronic imaging device; the push rod is connected with the rotating piece through a linkage assembly.

18. A drum unit according to claim 17, wherein said linkage assembly comprises a ring lever and a link, said ring lever being connected to said push rod and said link, said link being connected to said rotary member; when the push rod receives the driving force to move, the ring lever can be driven to rotate, and the connecting rod translates to drive the rotating piece to rotate.

19. A drum unit according to claim 3, wherein the drum coupling is provided with a mounting portion, the catching portion is provided with a movable member and a movable supporting portion, the movable member is provided with at least two movable members, the movable member is movably mounted on the mounting portion, the movable supporting portion is movably connected with the movable member and supports the movable member, and the movable supporting portion is mounted in the mounting portion and is movable in an axial direction of the photosensitive drum with respect to the mounting portion; when the movable supporting part moves, the movable part can be driven to rotate on the mounting part, so that at least two movable parts are close to or far away from each other.

20. A drum unit according to claim 19, wherein said movable supporting portion is centrally provided with a cylinder, and said driving force transmitting member abuts against said cylinder when said process cartridge is mounted to said electrophotographic apparatus, thereby pushing said movable supporting portion to be movable in an axial direction of said photosensitive drum with respect to said mounting portion.

21. A drum unit according to claim 20, wherein the movable support is provided with at least two support members, the support members being provided with a coupling shaft, the movable member being movably mounted on the coupling shaft so that the movable member can rotate on the movable support.

22. A drum unit according to claim 19, wherein the mounting portion is provided with a disc, the movable support portion is provided with a fan-shaped plane, and when the movable support portion is mounted in the mounting portion, the disc abuts against the fan-shaped plane to limit movement of the movable support portion.

23. A drum unit according to claim 22, wherein said mounting portion is provided with an annular surface, said disc is provided on an inner peripheral wall of said annular surface, and said annular surface is provided so as to be capable of abutting or contacting said driving force transmitting member inner peripheral wall when said process cartridge is mounted to the electronic image forming apparatus, to prevent said driving force transmitting member from being displaced.

24. A drum unit according to claim 23, wherein the mounting portion is further provided with a second recess, the second recess being L-shaped, the movable member being movably mounted in the second recess.

25. A drum unit according to claim 24, wherein said movable member includes an inclined plane extending in an axial direction of the drum coupling and a plane extending in a radial direction of the drum coupling, said two planes being fitted in said second recess and said planes being connected to said movable supporting portion, said inclined plane transmitting a driving force to said photosensitive drum by clamping said reinforcing cylindrical portion.

26. A drum unit according to claim 19, wherein said catching portion further comprises an elastic member defined between said photosensitive drum and said movable supporting portion; the elastic component is used for enabling the movable supporting part to prop against the mounting part and resetting after the movable supporting part moves.

27. A drum unit according to claim 3, wherein the drum coupling comprises:

a link movably disposed on the drum holding frame for receiving a closing force of the electronic imaging device;

The grabbing part is arranged at the input end of the connecting shaft and is used for grabbing or loosening the driving force transmission member of the electronic imaging device according to the axial movement of the connecting shaft so as to enable the driving force transmission member to be engaged with or loosened from the input end of the connecting shaft;

The connecting shaft, the connecting rod, the shaft pushing device and the grabbing part are arranged, when the connecting rod receives the closing force of the electronic imaging device and acts on the shaft pushing device, the shaft pushing device drives the connecting shaft to move from an extending position to a contracting position, and the grabbing part is in grabbing connection with the driving force transmission member by the connecting shaft to be connected to the input end of the connecting shaft so that the driving force is transmitted to the photosensitive drum through the connecting shaft; when the closing force of the electronic imaging device is lost, the connecting rod is reset and acts on the shaft pushing device, the shaft pushing device drives the connecting shaft to return to the extending position, and the grabbing part loosens the driving force transmission member.

28. A drum unit according to claim 27, wherein the shaft pushing means comprises:

the first member is rotatably sleeved on the connecting shaft and connected with the connecting rod;

The second component is rotationally sleeved on the connecting shaft and axially linked with the connecting shaft, and is abutted with the first component and can be pushed by the first component to move along the axial direction of the connecting shaft; and

The first member, the second member and the shaft pushing elastic piece are arranged so that when the first member receives the acting force of the connecting rod to rotate, the first member pushes the second member to move along the axial direction, thereby pushing the connecting shaft to move from the extending position to the contracting position; when the connecting rod is reset and acts on the first component, the first component is rotated and reset, and the second component is axially moved and reset under the action of the shaft pushing elastic piece to drive the connecting shaft to return to the extending position.

29. A drum unit according to claim 28, wherein the first member is provided with a first inclined portion, the second member is provided with a second inclined portion, and the first inclined portion and the second inclined portion abut to cause the first member to rotate, and the first inclined portion acts on the second inclined portion to urge the second member to move axially.

30. A drum unit according to claim 28, wherein said shaft pushing elastic member is a spring which is fitted over an output end of said connecting shaft, and both ends of which are respectively abutted against said second member and an end portion of said photosensitive drum.

31. A drum unit according to claim 27, further comprising a return elastic member connected between said link and said drum holding frame for return of said link.

32. A drum unit according to claim 28, wherein said link is movably provided on said drum holding frame with a first end for receiving a closing force of said electrophotographic apparatus and a second end connected to said first member.

33. A drum unit according to claim 27, wherein said catching portion includes at least two catching pieces which are uniformly distributed along a circumferential direction of said connecting shaft, and which are rotatable to approach toward a central axis direction of said connecting shaft so as to catch and abut said driving force transmitting member with an input end of said connecting shaft.

34. A drum unit according to claim 33, wherein said drum holding frame is provided with a claw fixing lever, said catching member being rotatably provided on said claw fixing lever;

The grabbing piece comprises a claw connecting part and a claw grabbing part, the claw connecting part is rotatably arranged on the claw fixing rod, a first end of the claw connecting part is arranged in the first annular groove, a second end of the claw connecting part is connected with the claw grabbing part, so that when the connecting shaft is contracted along the axial direction, the claw connecting part acts on the first annular groove to rotate around the claw fixing rod, the claw grabbing part is driven to approach towards the central shaft direction of the connecting shaft, and the driving force transmission component grabs and is in butt joint with the input end of the connecting shaft.

35. A drum unit according to claim 34, wherein said claw grip portion has an arcuate grip surface adapted to said driving force transmitting member.

36. A process cartridge, installed in an electronic image forming apparatus, comprising a drum unit according to any one of claims 1 to 35.