CN220491185U

CN220491185U - Process cartridge

Info

Publication number: CN220491185U
Application number: CN202321446454.2U
Authority: CN
Inventors: 曾丽坤; 李颖豪; 钟宝生; 罗琴; 梁祺杰; 陈宇; 靳杨; 陈柔娟
Original assignee: Zhuhai Nastar Information Technology Co ltd
Current assignee: Zhuhai Nastar Information Technology Co ltd
Priority date: 2022-06-08
Filing date: 2023-06-07
Publication date: 2024-02-13
Anticipated expiration: 2033-06-07
Also published as: CN117192925A; WO2023237043A1

Abstract

The application discloses a processing box, the processing box includes box body, sensitization drum, developing roller, send whitewashed roller, drive assembly and drive side end cover, sensitization drum, developing roller and send whitewashed roller to rotationally set up in the box body, drive assembly sets up in the tip of box body, and drive assembly includes first shaft coupling and second shaft coupling; the drive side end cover is arranged on the outer side of the drive assembly, the drive side end cover is provided with a first through hole and a notch part, a part of the first coupler is exposed on the outer side of the drive side end cover through the first through hole, a part of the second coupler is exposed on the outer side of the drive side end cover through the notch part, and in the axial direction of the developing roller, the projection of the notch part is larger than that of the second coupler. According to the method, the projection of the notch part is larger than the projection of the second coupler in the axial direction of the developing roller, so that part of the internal structure of the processing box can be exposed at the notch part, and maintenance can be realized without dismantling the end cover under the condition of local maintenance, so that the maintenance operation is convenient.

Description

Process cartridge

Technical Field

The application relates to the technical field of image formation, in particular to a processing box.

Background

An electrophotographic image forming apparatus forms an image on a recording material (such as paper) using an electrophotographic image forming process. Examples of the electronic image forming apparatus include an electrophotographic copying machine, an electrophotographic printer, a facsimile machine, a word processor, and the like. The cartridge includes at least one of an electrophotographic photosensitive drum as a photosensitive member and a developing member (such as a developing roller) capable of acting on the drum, and the photosensitive member and the developing member may also be integrally configured as a cartridge (may be referred to as a process cartridge) detachably mountable to an electrophotographic image forming apparatus. The frame including the photosensitive member in the process cartridge is a photosensitive frame, and the frame including the developing member is a developing frame.

In the prior art, this kind of processing box adopts the dual drive structure, sets up a shaft coupling on the photosensitive frame promptly, also sets up a shaft coupling on the developing frame, and two shaft couplings expose through two through-holes on the end cover respectively, and other structures of processing box can not observe from the end cover outside, when need maintain, can not observe the inner structure of processing box in the outside, need demolish the end cover and just can maintain, especially to the local maintenance of individual part, also need all demolish the end cover, maintenance process is more loaded down with trivial details.

Disclosure of Invention

In order to overcome the problems of the prior art, a main object of the present application is to provide a process cartridge capable of maintaining the internal structure of the process cartridge without removing an end cap.

In order to achieve the above purpose, the present application specifically adopts the following technical scheme:

the present application provides a process cartridge including:

a case body;

the photosensitive drum is rotatably arranged on the box body;

the developing roller is rotatably arranged on the box body;

the powder feeding roller is rotatably arranged on the box body;

the driving assembly is arranged at the end part of the box body and comprises a first coupler and a second coupler, and the first coupler and the second coupler are used for receiving the driving force output by the electronic imaging equipment and transmitting the driving force to the photosensitive drum, the developing roller and the powder feeding roller;

The drive side end cover, the drive side end cover set up in the outside of drive assembly, just the drive side end cover is equipped with first through-hole and breach portion, a portion of first shaft coupling passes through first through-hole expose in the drive side end cover outside, a portion of second shaft coupling passes through breach portion expose in the drive side end cover outside, and in the axial of developer roll, the projection of breach portion is greater than the projection of second shaft coupling.

Compared with the prior art, the notch part is arranged on the end cover at the driving side, and the projection of the notch part on the axial direction of the developing roller is larger than that of the second coupler on the axial direction of the developing roller, so that the part of the internal structure of the processing box can be exposed at the notch part, and maintenance can be realized without dismantling the end cover under the condition of local maintenance.

Drawings

Fig. 1 is a schematic view of a process cartridge according to an embodiment of the present application;

fig. 2 is a schematic view of a process cartridge according to an embodiment of the present application at another angle;

FIG. 3 is a partially exploded view of a process cartridge according to a first embodiment of the present application, with end caps omitted;

FIG. 4 is a schematic view of a process cartridge according to an embodiment of the present application, in which an end cover is omitted;

Fig. 5 is a schematic structural view of an end cover of a process cartridge according to the first embodiment of the present application;

fig. 6 is a schematic structural view of a process cartridge according to a second embodiment of the present application, in which an end cover is omitted;

fig. 7 is a schematic structural view of a modification of the process cartridge according to the second embodiment of the present application, in which the end cover is omitted;

fig. 8 is a schematic structural view of a second transmission member of a modification of the process cartridge according to the second embodiment of the present application;

fig. 9 is a schematic structural view of a process cartridge according to a third embodiment of the present application, in which an end cover is omitted;

FIG. 10 is a schematic view showing a transmission structure of a process cartridge according to a third embodiment of the present application;

FIG. 11 is an exploded view of the transmission structure of the process cartridge of the third embodiment of the present application;

FIG. 12 is a schematic view of a transmission structure and a second elastic member of a process cartridge according to a third embodiment of the present disclosure;

fig. 13 is a partial schematic view of a developing unit of a process cartridge of the third embodiment of the present application;

fig. 14 is a schematic structural view of a process cartridge according to a fourth embodiment of the present application;

FIG. 15 is a partial schematic view of a process cartridge according to a fourth embodiment of the present application, in which an end cap is omitted;

FIG. 16 is a schematic view showing a process cartridge according to a fifth embodiment of the present application;

FIG. 17 is a schematic view of a process cartridge according to a fifth embodiment of the present application, in which the end cap is omitted;

FIG. 18 is a partial schematic view of a drive end of a cartridge according to a fifth embodiment of the present application at an angle;

FIG. 19 is a partial schematic view of another angle of the drive end of the cartridge of the fifth embodiment of the present application;

FIG. 20 is an exploded view of a second coupling and a second transmission member of a process cartridge according to a fifth embodiment of the present application;

fig. 21 is a schematic structural view of a process cartridge according to a sixth embodiment of the present application;

FIG. 22 is a partially exploded view of a process cartridge according to a sixth embodiment of the present application;

fig. 23 is a schematic structural view of a developing frame of a process cartridge according to a sixth embodiment of the present application;

FIG. 24 is a schematic view showing the overall structure of a process cartridge according to a seventh embodiment of the present application;

FIG. 25 is a schematic view showing the overall structure of a process cartridge according to a seventh embodiment of the present application at another angle;

fig. 26 is a partially exploded view of a process cartridge according to a seventh embodiment of the present application;

fig. 27 is a schematic structural view of a developing cover of a process cartridge according to a seventh embodiment of the present application;

fig. 28 is a schematic structural view of a drive side end cap of a process cartridge according to a seventh embodiment of the present application;

fig. 29 is a schematic view showing the overall structure of the process cartridge according to the eighth embodiment of the present application at an angle;

FIG. 30 is a schematic view showing the overall structure of a process cartridge according to an eighth embodiment of the present application at another angle;

Fig. 31 is a schematic view of a process cartridge according to an eighth embodiment of the present application as seen in the axial direction of the developing roller, the developing cover being omitted;

fig. 32 is a schematic structural view of a drive side end cap of a process cartridge according to an eighth embodiment of the present application;

FIG. 33 is a schematic view showing the overall structure of a process cartridge according to a ninth embodiment of the present application at an angle;

fig. 34 is a schematic view of a structure of a process cartridge driving side according to a ninth embodiment of the present application;

FIG. 35 is a schematic view of a drive side of a cartridge with end caps and developer covers removed;

fig. 36 is a schematic structural view of a process cartridge mounting slider according to a ninth embodiment of the present application;

fig. 37 is a schematic structural view of a developing cover of a process cartridge according to a ninth embodiment of the present application;

fig. 38 is a schematic structural view of a process cartridge force receiving member of embodiment nine of the present application;

fig. 39 is a schematic view of the overall structure of a process cartridge according to the tenth embodiment of the present application;

fig. 40 is a partial schematic structural view of a process cartridge according to a tenth embodiment of the present application;

fig. 41 is a partially exploded view of a process cartridge according to a tenth embodiment of the present application;

FIG. 42 is a schematic view of a separator according to a tenth embodiment of the present application;

FIG. 43 is a schematic view of a developer cover according to a tenth embodiment of the present disclosure;

fig. 44 is a partial structural schematic view of the process cartridge of the tenth embodiment of the present application, as viewed in the first direction;

Fig. 45 is a partial structural schematic view of the process cartridge of the tenth embodiment of the present application, as viewed in the third direction;

FIG. 46 is a partial schematic view of a process cartridge according to a tenth embodiment of the present application in a retracted position;

fig. 47 is a partial schematic view of the structure of the separating member of the process cartridge of the tenth embodiment of the present application in the operating position;

fig. 48 is a partial schematic structural view of a separating member of the process cartridge of the eleventh embodiment of the present application in an operating position;

FIG. 49 is a partial schematic view showing a configuration in which a separating member of a process cartridge according to an eleventh embodiment of the present application is in a retracted position;

FIG. 50 is a schematic view showing the structure of a separator according to an eleventh embodiment of the present application;

fig. 51 is a partial schematic structural view of a process cartridge according to an eleventh embodiment of the present application, as viewed in a first direction;

fig. 52 is a partial structural schematic view of the process cartridge of the eleventh embodiment of the present application, as viewed in the third direction;

fig. 53 is a schematic view of the overall structure of a process cartridge according to a twelfth embodiment of the present application;

fig. 54 is a partial schematic configuration of a process cartridge according to a twelfth embodiment of the present application;

fig. 55 is a partially exploded view of a process cartridge according to a twelfth embodiment of the present application;

FIGS. 56 (a) and (b) are schematic views showing the structure of a separator according to a twelfth embodiment of the present application;

FIG. 57 is a schematic view of a developer cover according to a twelfth embodiment of the present disclosure;

FIG. 58 is a partial schematic view of a separator of a cartridge according to a twelfth embodiment of the present application in a retracted position;

FIG. 59 is a partial schematic view showing the structure of a separating member of the process cartridge of the twelfth embodiment of the present application in an operating position;

FIG. 60 is a schematic view showing a partial structure of a process cartridge according to a thirteenth embodiment of the present application;

fig. 61 is a schematic view showing the structure of a developing cover, a pushing member and a returning member in the process cartridge according to the thirteenth embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

In the description of the present application, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" means two or more, and the term "plurality" means two or more, unless specified or indicated otherwise; the terms "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In the description of the present application, it should be understood that the terms "upper," "lower," and the like in the embodiments of the present application are described in terms of angles shown in the accompanying drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.

An electrophotographic image forming apparatus forms an image on a recording material using, for example, an electrophotographic image forming process. The electrophotographic image forming apparatus includes, for example, an electrophotographic copying machine, an electrophotographic printer (LED printer, laser printer, etc.), a facsimile machine of the electrophotographic printer type, and the like. The process cartridge is detachably mounted in an electronic image forming apparatus, and includes a photosensitive drum, a developing roller for developing an electrostatic latent image formed on the photosensitive drum, and the like. The electronic image forming apparatus includes a driving head for transmitting a driving force of the electronic image forming apparatus to the process cartridge to operate the process cartridge.

The description of the orientation in the following description is specified as:

The directions A1 and A2 are first directions, the direction A1 is the positive direction of the first direction, and the direction A2 is the negative direction of the first direction;

the directions B1 and B2 are the second direction, the direction B1 refers to the positive direction of the second direction, and the direction B2 refers to the negative direction of the second direction;

the directions C1 and C2 are the third directions, the direction C1 is the positive direction of the third direction, and the direction C2 is the negative direction of the third direction.

The first direction, the second direction, and the third direction intersect each other.

Example 1

As shown in fig. 1 and 2, the present embodiment provides a process cartridge including a developing unit 10, a drum unit 20, a urging member 30, and a driving assembly, wherein a frame of the developing unit 10 and the drum unit 20 forms a cartridge body.

The developing unit 10 includes a developing frame 11, a developing roller, a powder feeding roller, and a powder discharging blade. The drum unit 20 includes a photosensitive frame 21, a photosensitive drum 22, a charging roller, and a cleaning blade.

The developing frame 11 encloses a hopper for storing developer (e.g., toner), the developing frame 11 has a substantially long box shape, and the developing frame 11 has end surfaces at both ends in the longitudinal direction. The developing frame 11 may be provided with a powder adding port through which carbon powder is added into the powder bin, and the powder adding port may be provided on one of the end faces of the developing frame 11. The toner feeding roller and the developing roller are rotatably supported at both ends in the longitudinal direction of the developing frame 11, and the developing roller is located at the lower end side of the developing frame 11 in the height direction. The powder feeding roller and the developing roller can rotate under the action of the driving assembly, and the rotation axes of the powder feeding roller and the developing roller are along the length direction of the developing frame 11. The toner feeding roller feeds the toner onto the developing roller and is attracted by the charged developing roller.

As shown in fig. 2, the photosensitive frame 21 encloses a waste toner hopper for collecting waste toner, the photosensitive frame 21 also has a length direction, the length direction thereof coincides with the length direction of the developing frame 11, the photosensitive drum 22 is rotatably supported at both ends of the photosensitive frame 21 in the length direction, and specifically, the photosensitive drum 22 is provided at a lower end side of the photosensitive frame 21 in the height direction. The waste toner bin is disposed along the length direction of the photosensitive frame 21, and is located at one side of the photosensitive drum 22. The toner adsorbed by the developing roller transfers the toner to the photosensitive drum 22 by a potential difference with the photosensitive drum 22, and the toner on the photosensitive drum is transferred by a transfer belt of an electrophotographic apparatus to form an image on a recording material (e.g., paper). After transfer printing, the cleaning scraper is in linear contact with the photosensitive drum 22, and cleans the toner which is not completely transferred on the surface of the photosensitive drum 22, namely waste toner, 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 22, thereby enabling the photosensitive drum 22 to adsorb toner.

In the working process of the electronic imaging device, the developing roller and the photosensitive drum 22 need to be in tight contact, when the electronic imaging device does not work, the developing roller and the photosensitive drum 22 need to be separated by a certain distance, and the problems that the photosensitive drum 22 is polluted by redundant developer attached to the developing roller or the developing roller deforms or the photosensitive drum 22 is worn and the like due to long-time contact between the developing roller and the photosensitive drum 22 are avoided.

Based on this, the drum unit 20 and the developing unit 10 in the present embodiment are provided so as to be relatively movable, thereby enabling the developing roller and the photosensitive drum 22 to be brought into contact when the electrophotographic apparatus is in operation and to be separated when not in operation. When the process cartridge is mounted in the electronic image forming apparatus, the drum unit 20 abuts against a member in the electronic image forming apparatus, the drum unit 20 is not movable, the developing unit 10 is provided to be movable relative to the drum unit 20 between a first position in which the developing roller is in contact with the photosensitive drum 22, and a second position in which the developing unit 10 is in the first position; when the developing unit 10 is at the second position, the developing roller is separated from the photosensitive drum 22.

In this embodiment, the developing unit 10 swings around the middle position in the height direction, that is, when the developing unit 10 is located at the first position, the lower end of the developing unit 10 is close to the lower end of the drum unit 20, so that the developing roller can contact the photosensitive drum 22, and at this time, the upper end of the developing unit 10 is located at a position far from the drum unit 20; when the developing unit 10 moves from the first position to the second position, the lower end of the developing unit 10 swings away from the drum unit 20, driving the developing roller to separate from the photosensitive drum 22, and at this time, the upper end of the developing unit 10 swings toward the drum unit 20.

As shown in fig. 2, the movement of the developing unit 10 from the first position to the second position is achieved by the cooperation of the urging member 30 and the urging member in the electronic imaging device. Specifically, the developing unit 10 is provided with a pushing member 30 on one end surface or both end surfaces in the length direction, the pushing member 30 is rotatably disposed on the end surface of the developing unit 10, the pushing member 30 is in a shape of a bar arm, one end of the pushing member is hinged to the developing unit 10, and the other end of the pushing member can drive the developing unit 10 to move from the first position to the second position in a direction away from the drum unit 20 when receiving the acting force of the force applying member, so that the developing roller is separated from the photosensitive drum 22.

As shown in fig. 3, in this embodiment, the developing unit 10 further includes a driving end support 12, the driving end support 12 is disposed on an end surface of the developing frame 11, the urging member 30 may be hinged on the driving end support 12, and the driving end support 12 is fixed on the end surface of the developing frame 11 by a screw. In some other embodiments, the pushing member 30 may not be disposed on the driving end bracket 12, a fulcrum may be disposed on the end surface of the developing unit 10, and one end of the pushing member 30 may be sleeved on the fulcrum, so that the pushing member 30 may be mounted. A part of the free end of the urging member 30 is exposed from below to the outside of the developing frame 11, so that the urging member is brought into contact therewith from below, and an urging force is applied thereto.

As shown in fig. 1, a first elastic member 40 is further provided between the drum unit 20 and the developing unit 10 for moving the developing unit 10 from the second position to the first position, bringing the developing roller into contact with the photosensitive drum 22. Specifically, one end of the first elastic member 40 is connected to the upper end of the photosensitive frame 21, and the other end is connected to the upper end of the developing frame 11. The first elastic member 40 is preferably a spring, and may be a member capable of providing elastic force, such as elastic rubber, elastic sponge, or elastic sheet.

When the electronic imaging device does not work, the force application member contacts the force application member 30 from below and applies force to the force application member, so that the free end of the force application member 30 synchronously drives the developing unit 10 to move from the first position to the second position in the rotating process, the photosensitive drum 22 is separated from the developing roller, and at the moment, the upper end of the developing unit 10 moves towards the direction approaching the photosensitive drum 22, and the first elastic member 40 is compressed.

When the electronic imaging device needs to work, the acting force of the force application member on the urging member 30 is removed, the elastic deformation of the first elastic member 40 is recovered, and the developing unit 10 is pushed to move from the second position to the first position, and the developing roller is contacted with the photosensitive drum 22. At the same time, the urging member 30 also returns to the home position with the movement of the developing unit 100.

The driving assembly is provided outside the end face of the process cartridge in the longitudinal direction, and may be specifically provided outside one end face of the developing frame 11 and the photosensitive frame 21 in the longitudinal direction. The driving assembly is used for receiving and transmitting the driving force of the electronic imaging equipment (such as a laser printer) to enable the processing box to work.

As shown in fig. 1 and 2, the process cartridge further includes an end cap 60, and the end cap 60 is covered on the outer side of the end surfaces of the cartridge body at both ends in the longitudinal direction for protecting the driving assembly provided on the end surface of the process cartridge.

In the present embodiment, the end cover 60 at the driving end of the cartridge body is provided with a through hole for exposing a first power receiving member (for example, a first coupling described below) connected to the photosensitive drum to the outside of the end cover 60 so that the first power receiving member connected to the photosensitive drum is engaged with the driving head of the electrophotographic apparatus, and the developing cover and other parts of the driving assembly, for example, the developing roller gear, the toner feeding roller gear, etc., are shielded by the end cover 60, thereby preventing the developing cover or the developing roller gear, etc., from being damaged by the end cover 60.

As shown in fig. 3 to 5, the driving assembly includes a first coupling 51, a first transmission member 52, a second transmission member 53, a third transmission member 54, a developing roller gear 55, and a powder feeding roller gear 56, and the first coupling 51 is a first power receiving member.

Specifically, the first coupling 51 is fixedly disposed at one end of the photosensitive drum 22 in the length direction, or may be integrally formed with the photosensitive drum 22, and the first coupling 51 is used for engaging with a driving head of the electronic imaging device, so as to receive a rotational driving force of the electronic imaging device, and drive the photosensitive drum 22 fixedly connected with the first coupling to rotate. The first coupling 51 is provided with a triangular prism-shaped engagement head at one end thereof remote from the end face of the drum unit 20, and the engagement head may be of other shapes as long as it can engage with the drive head to stably receive the driving force.

The first transmission member 52 is set to be a first gear, the first gear is coaxially sleeved outside the first coupling member 51, the gear portion of the first gear is a helical gear, the first transmission member 52 is connected with the first coupling member 51, for example, a convex rib can be arranged on the inner wall of the first transmission member 52 along the axial direction of the first transmission member, a groove matched with the convex rib is arranged on the outer wall of the first coupling member 51 along the axial direction of the first transmission member, and the first coupling member 51 and the first transmission member 52 are connected through the convex rib and the groove in a clamping mode, so that when the first coupling member 51 receives driving force to rotate, the first transmission member 52 also rotates synchronously. Alternatively, the first transmission member 52 and the first coupling 51 may be connected by welding, pasting, or the like.

The developing roller gear 55 is disposed at one end of the developing roller in the length direction, and the developing roller gear 55 may be fixedly connected or detachably connected to the developing roller, so long as the developing roller gear 55 can rotate to drive the developing roller to rotate synchronously.

The powder feeding roller gear 56 is disposed at one end of the powder feeding roller in the length direction, and the powder feeding roller gear 56 and the powder feeding roller may be fixedly connected or detachably connected, so long as the powder feeding roller gear 56 can rotate to drive the powder feeding roller to synchronously rotate.

With continued reference to fig. 3 to 5, the second transmission member 53 is located outside the end face of the developing unit 10, the second transmission member 53 is engaged with the developing roller gear 55 and the powder feeding roller gear 56, the second transmission member 53 is provided as a second gear including a first gear portion 531 and a second gear portion 532, the first gear portion 531 and the second gear portion 532 are arranged in the axial direction of the second transmission member 53, the first gear portion 531 is farther from the end face of the developing unit 10 in the axial direction relative to the second gear portion 532, the diameter of the first gear portion 531 is larger than the diameter of the second gear portion 532, and both the first gear portion 531 and the second gear portion 532 are helical teeth.

As shown in fig. 5, a first mounting post 61 is provided on the inner side of the end cover 60, the second transmission member 53 is mounted on the first mounting post 61 in a sleeved manner, when the second transmission member 53 and the end cover 60 are assembled together to the outer side of the end face of the developing unit 10, the first gear portion 531 of the second transmission member 53 is meshed with the developing roller gear 55, the second gear portion 532 is meshed with the powder feeding roller gear 56, and the second transmission member 53 can rotate to simultaneously drive the developing roller gear 55 and the powder feeding roller gear 56 to rotate.

As shown in fig. 3 to 5, the third transmission member 54 is an intermediate gear engaged with the first transmission member 52 and the second transmission member 53, specifically, the inside of the end cover 60 is provided with a second mounting post 62, the third transmission member 54 is fitted over the second mounting post 62, when the third transmission member 54 and the end cover 60 are assembled together to the outside of the end face of the developing unit 10, the third transmission member 54 is engaged with the gear portion of the first transmission member 52, and the third transmission member 54 is also engaged with the first gear portion 531 of the second transmission member 53. The gear portion of the third transmission member 54 is also helical.

When the process cartridge is in operation, the first coupling 51 is engaged with the driving head of the electronic imaging device, receives the rotation of the rotation driving force, drives the photosensitive drum 22 and the first transmission member 52 to coaxially rotate, the first transmission member 52 drives the third transmission member 54 in transmission connection with the first transmission member, the third transmission member 54 drives the second transmission member 53 in transmission connection with the third transmission member 54 to rotate, and the second transmission member 53 drives the developing roller gear 55 and the powder feeding roller gear 56 in transmission connection with the second transmission member 53 to rotate. The rotational driving force received from the electronic image forming apparatus by the first coupling 51 is transmitted through the power of the above-described process, so that the photosensitive drum 22, the developing roller, and the toner feeding roller are all driven to rotate, and the process cartridge can be operated normally.

In the process cartridge provided in this embodiment, the developing unit 10 can move relative to the drum unit 20, and the driving assembly of this embodiment replaces the dual driving method of the prior art, and only one driving head is required to be provided for the electronic imaging device, and only one coupling for receiving rotational power is required to be provided for the process cartridge, so that the electronic imaging device and the process cartridge are relatively simple in structure and low in cost. In addition, when the developing unit 10 is in the first position and the second position, the third transmission member 54 is always meshed with the first transmission member 52 and the second transmission member 53, so that the developing roller and the photosensitive drum 22 can be changed from the separated state to the contact state more smoothly, the situation that collision is generated when the first transmission member 52 and the second transmission member 53 are directly meshed is avoided, and the service lives of the first transmission member 52 and the second transmission member 53 are prolonged.

Example two

The present embodiment is basically the same in structure as the first embodiment, except that: the drive assembly is structurally different.

In this embodiment, the third transmission member 54 is a transmission belt, and the transmission belt is in transmission connection with the first transmission member 52 and the second transmission member 53.

As shown in fig. 6, the driving belt may be a crawler belt, and the inner side of the crawler belt is provided with driving teeth 541, and the first driving member 52 may be provided as a sprocket wheel capable of being engaged with the driving teeth 541.

The second transmission member 53 is further provided with a third gear portion provided on a side of the first gear portion 531 away from the end surface of the developing unit 10, the third gear portion being capable of meshing with the transmission teeth 541 of the crawler belt.

When assembled, the tracks are sleeved outside and meshed with the gear portion of the first transmission member 52 and the third gear portion of the second transmission member 53.

When the first coupling 51 receives the rotation driving force to rotate, the first transmission member 52 follows the rotation, and serves as a driving wheel to drive the second transmission member 53 to rotate through the crawler transmission, and the second transmission member 53 drives the developing roller gear 55 and the powder feeding roller gear 56 which are in transmission connection therewith to rotate.

As a modification of the second embodiment, as shown in fig. 7 and 8, the belt may be a belt, and when the belt is provided as a belt, the first transmission member 52 is provided as a round wheel correspondingly, the second transmission member 53 is provided as a round wheel portion 533 correspondingly, and the round wheel portion 533 is provided on a side of the first gear portion 531 remote from the end surface of the developing unit 10.

The belt is sleeved on the round wheel portion 533 of the first transmission member 52 and the second transmission member 53, when the first coupling 51 receives the rotation of the rotation driving force, the first transmission member 52 rotates in a following manner, and friction between the belt and the first transmission member 52 and the round wheel portion 533 transmits the driving force, so that the second transmission member 53 is driven to rotate, and the second transmission member 53 drives the developing roller gear 55 and the powder feeding roller gear 56 which are in transmission connection with the second transmission member to rotate.

The embodiment can also realize the single driving effect by a transmission mode of a transmission belt.

Other structures of the process cartridge of the present embodiment are the same as those of the first embodiment, and will not be described here again.

Example III

The present embodiment is basically the same as the first and second embodiments in structure, except that: the drive assembly is structurally different.

In this embodiment, as shown in fig. 9, the third transmission member 54 is a developing roller gear 55, the developing roller gear 55 is mounted inside the end cover 60, specifically, a third mounting post is disposed inside the end cover 60, and the developing roller gear 55 is sleeved on the third mounting post. The developing roller gear 55 is connected to the developing roller 15 through a transmission structure.

As shown in fig. 10 and 11, the transmission structure includes a connecting member 57 and a transmitting member 58, the connecting member 57 being fixedly provided at one end of the developing roller 15, both ends of the transmitting member 58 being respectively connected to the connecting member 57 and the developing roller gear 55.

Specifically, as shown in fig. 10 to 13, one end of the connecting member 57 is fixedly connected with one end of the developing roller 15, a boss 571 is provided in the middle of the other end (the end far from the end face of the developing unit 10), a third abutting portion 572 is provided on the outer side wall of the boss 571, the third abutting portion 572 is two third bosses formed on the outer side wall of the boss 571, the two third bosses are located on the same straight line, and the extending directions of the two third bosses extend along the direction intersecting with the axial direction of the developing roller 15, that is, the two third bosses extend along the radial direction of the boss 571. The two third studs may be cylindrical in configuration or may be of other geometric shape. The third contact portion 572 may be integrally formed with the boss 571, or may be a separate structure, and may be connected by welding, adhesion, or engagement.

As shown in fig. 10 and 11, the transmission member 58 includes a second abutting portion 581, a truncated cone portion 582, a first connecting portion 583, and a spherical portion 584, which are sequentially provided in the end surface direction away from the developing unit 10, and a first abutting portion 585 is formed on the spherical portion 584.

As shown in fig. 10 and 11, the second abutting portion 581 is configured to abut against the third abutting portion 572 when power is transmitted, the second abutting portion 581 is two second protruding columns formed at one end of the round table portion 582, the two second protruding columns extend along the axial direction of the developing roller 15, the two second protruding columns may be integrally formed at one end of the round table portion 582, the two second protruding columns are disposed near the outermost surface of the round table portion 582, and the outermost surfaces of the two second protruding columns may be flush with the outermost surface of the round table portion 582. The two second protruding columns are oppositely arranged in the radial direction of the round platform 582, and a space is arranged between the two second protruding columns, and the size of the space is matched with the size of the boss 571; the extending direction of the third abutting portion 572 and the extending direction of the second abutting portion 581 intersect, when the coupling member 57 is engaged with the transmission member 58, the boss 571 is engaged with the space between the two bosses of the second abutting portion 581, and the second boss of the second abutting portion 581 is in abutting engagement with the third boss of the third abutting portion 572, so that the coupling member 57 can be driven to rotate when the transmission member 58 rotates.

As shown in fig. 11, the other end of the truncated cone 582 is a first connection portion 583, the first connection portion 583 is a cylindrical member, and the outer diameter of the first connection portion 583 is smaller than the outer diameter of the truncated cone 582.

As shown in fig. 11, the first abutment portion 585 is two first bosses formed on the outer side wall of the spherical portion 584, the two first bosses being located on the same straight line, the extending directions of the two first bosses extending in a direction intersecting the axial direction of the developing roller 15, that is, the two first bosses extending in the radial direction of the spherical portion 584. An angle is formed between a line of the two first posts of the first abutting portion 585 and a line of the two second posts of the second abutting portion 581, preferably the angle is 90 °, that is, the line of the two first posts of the first abutting portion 585 and the line of the two second posts of the second abutting portion 581 intersect in a cross.

The developing roller gear 55 has a hollow passage inside, and has a bevel gear on its outer circumferential surface, and is engaged with the first transmission member 52 and the second transmission member 53 by the bevel gear, so that the driving force received by the first coupling 51 is sequentially transmitted to the first transmission member 52, the developing roller gear 55, the second transmission member 53, and the powder feeding roller gear 56.

Further, as shown in fig. 11 to 13, a limiting groove 551 is formed on the inner wall of the developing roller gear 55, the limiting groove 551 is used for being matched with the first abutting portion 585, specifically, when the transmitting member 58 is assembled with the developing roller gear 55, a part of the spherical portion 584 is inserted into the hollow channel of the developing roller gear 55, and two first protruding columns of the first abutting portion 585 are clamped into the limiting groove 551 of the developing roller gear 55, so that when the developing roller gear 55 rotates, the transmitting member 58 can be driven to rotate again, and driving force is further transmitted to the developing roller 15.

Further, as shown in fig. 9, 12 and 13, the process cartridge further includes a second elastic member 50 for inclining the axis of the transfer member 58 with respect to the axis of the developing roller 15 in a state where the developing roller 15 and the photosensitive drum 22 are separated. Specifically, the second elastic member 50 is a torsion spring, the end face of the developing frame 11 is provided with a first post 13, a loop portion of the torsion spring is sleeved on the first post 13, one end of the torsion spring abuts against a second post 14 provided on the end face of the developing frame 11, the other end of the torsion spring abuts against a first connecting portion 583 of the transmission member 58, and the torsion spring is configured to always exert a force on the transmission member 58 in a direction along the first position of the developing unit 10 toward the second position, i.e., along the direction in which the developing roller 15 is away from the photosensitive drum 22.

When the developing unit 10 moves from the first position to the second position and the developing roller 15 is separated from the photosensitive drum 22, the connecting member 57 moves together with the developing roller 15 in a direction away from the photosensitive drum 22, the third abutting portion 572 of the connecting member 57 is disengaged from the second abutting portion 581 of the transmitting member 58, the urging force therebetween disappears, the transmitting member 58 is inclined in a direction away from the photosensitive drum 22 by the urging force of the second elastic member 50, and the axis of the transmitting member 58 forms an angle with the axis of the connecting member 57 and remains in an inclined state until the developing roller 15 and the photosensitive drum 22 come into contact again.

The transfer member 58 is inclined, so that when the developing roller 15 and the photosensitive drum 22 come into contact, the third abutting portion 572 and the second abutting portion 581 are prevented from interfering with each other, and the both can be smoothly engaged, and in the engagement process, the connecting member 57 applies a force to the transfer member 58 in a direction approaching the photosensitive drum 22, and the transfer member 58 is pushed to be aligned, that is, the axis of the transfer member 58 and the axis of the connecting member 57 overlap with each other, whereby the transfer of the driving force can be performed. With this structure, the engagement time of the transmitting member 58 and the connecting member 57 in the process of the contact of the developing roller 15 and the photosensitive drum 22 can be made shorter, the engagement can be smoother, and impact damage in the engagement can be avoided.

Example IV

The process cartridge of this embodiment is basically the same as that of the first embodiment in that: the drive assembly is structurally different.

In this embodiment, as shown in fig. 14 and 15, a second coupling 59 is added to the driving assembly, and the structure of the second transmission member 53 is also different from that of the first embodiment, and other components in the driving assembly are the same as those of the first embodiment, and only the differences will be described.

As shown in fig. 15, a second coupling 59 is rotatably provided on an end surface of the developing unit 10, the second coupling 59 being for engagement with a driving head of the electronic imaging device, thereby receiving a rotation driving force of the electronic imaging device. The end of the second coupling 59 remote from the end face of the developing unit 10 is provided with a triangular prism-shaped engagement head, and the shape of the engagement head may be other shape as long as it can engage with the drive head of the electronic imaging device to stably receive the driving force.

The second transmission member 53 is a gear coaxially provided with the second coupling member 59, and the second transmission member 53 and the second coupling member 59 may be integrally formed or may be separately formed, and may be connected by means of engagement, adhesion, welding, or the like, so long as the second transmission member 53 can be rotated synchronously when the second coupling member 59 is rotated.

The second transmission member 53 is provided with a second gear portion, the second gear portion is meshed with the powder feeding roller gear 56, the second coupling member 59 receives the driving force of the electronic imaging device to rotate, and drives the second transmission member 53 to rotate synchronously, and the second transmission member 53 drives the powder feeding roller gear 56 to rotate again, that is, in this embodiment, the second coupling member 59 and the second transmission member 53 are only used for driving the powder feeding roller to rotate, and the second transmission member 53 omits the first gear portion used for driving the developing roller gear 55 as in the first embodiment.

In this embodiment, as shown in fig. 15, the third transmission member 54 is an intermediate gear engaged with the first transmission member 52 and the developing roller gear 55, and the third transmission member 54 is constructed and mounted in the same manner as in the first embodiment.

When the process cartridge works, the first coupling 51 is meshed with a driving head of the electronic imaging device, receives the rotation driving force to rotate, drives the photosensitive drum 22 and the first transmission member 52 to coaxially rotate, and the first transmission member 52 drives the third transmission member 54 in transmission connection with the first transmission member to rotate, and the third transmission member 54 drives the developing roller gear 55 in transmission connection with the third transmission member to rotate; meanwhile, the second coupling 59 is engaged with the other driving head of the electronic imaging device, receives the rotation driving force to rotate, drives the second transmission member 53 to coaxially rotate, and drives the powder feeding roller gear 56 in transmission connection with the second transmission member 53 to rotate.

The driving assembly in this embodiment adopts a dual driving structure, the driving force received by the first coupling 51 drives the photosensitive drum 22 and the developing roller to rotate, and the driving force received by the second coupling 59 drives the powder feeding roller to rotate, so that the torque at the first coupling 51 can be reduced because the first coupling 51 drives the photosensitive drum 22 and the developing roller to rotate and does not drive the powder feeding roller to rotate.

Example five

The present embodiment is different from the first to fourth embodiments in that the developing roller and the photosensitive drum 22 do not need to be separated when the electrophotographic image forming apparatus is not in operation.

As shown in fig. 16 to 18, one end of the process cartridge in the longitudinal direction is a drive end, the other end opposite to the drive end is a non-drive end, a drive assembly is disposed at the drive end of the process cartridge, the developing unit 10 is provided with a drive end support 12 at the outer side of the drive end, the developing unit 10 is provided with a non-drive end support 16 at the outer side of the non-drive end, and the drive end support 12 and the outer side of the non-drive end support 16 are both provided with end caps 60.

The driving assembly of the present embodiment adopts a double driving structure as in the fourth embodiment, and is different from the fourth embodiment in that the first coupling 51 is only used for driving the photosensitive drum 22, the first transmission member 52 and the third transmission member 54 are omitted, and the second coupling 59 and the second transmission member 53 drive the developing roller and the powder feeding roller.

As shown in fig. 20, the second coupling 59 and the second transmission member 53 of the present embodiment are detachably connected, and a part of the second coupling 59 is inserted into the inner cavity of the second transmission member 53 and engaged with the second transmission member 53 so that the second coupling 59 cannot be pulled out from the second transmission member 53 and is not relatively movable in the circumferential direction, i.e., the second coupling 59 and the second transmission member 53 are relatively stationary (synchronously rotated) when rotated.

In the present embodiment, the second coupling 59 is constructed so as to be movable in the axial direction of the cartridge, specifically, in the inner cavity of the second transmission member 53 along the axis thereof toward or away from the end face of the developing unit 10.

As shown in fig. 20, in the present embodiment, a third elastic member 70 is provided in the inner cavity of the second transmission member 53, one end of the third elastic member 70 abuts against the inner wall of the second transmission member 53, the other end abuts against the second coupling 59, and the third elastic member 70 is constructed in a compressed state, so that the second coupling 59 is maintained at a position away from the end face of the developing unit 10 without receiving an external force.

As shown in fig. 19 and 20, in this embodiment, the second coupling 59 is further provided with a guide portion 591, the guide portion 591 is a protrusion formed on the second coupling 59, the guide portion 591 is located at the periphery of the engagement head of the second coupling 59 and does not protrude from the engagement head in the axial direction, the guide portion 591 is provided with a guide surface 5911, and the guide surface 5911 is preferably an inclined surface or may be an arc surface. The number of the guide portions 591 may be plural, and disposed along the circumferential direction of the second coupling 59, the guide portions 591 also move along the circular track when the second coupling 59 rotates receiving the driving force.

As shown in fig. 16 to 19, in the present embodiment, the structure of the urging member 30 is different from that of the first embodiment, the urging member 30 is located at the driving end of the developing unit 10, the urging member 30 is connected to the driving end support 12 through a fourth elastic member 80, the urging member 30 includes a pressing block 31 and an arm portion 32, the arm portion 32 is substantially L-shaped, one end of the arm portion 32 is connected to the pressing block 31, the other end extends to the vicinity of the second coupling 59, one end of the fourth elastic member 80 is connected to the driving end support 12, and the other end is connected to the arm portion 32 or the pressing block 31 of the urging member 30. In a state where no external force is applied, the other end of the arm portion 32 is located outside the movement locus of the guide portion 591, that is, the urging member 30 does not interfere with the guide portion 591 when the second coupling 59 rotates. The end cover 60 of the driving end and the driving end bracket 12 are respectively provided with an avoidance groove for avoiding the arm part 32, so that the other end of the arm part 32 can extend to a position close to the guide part 591.

When the electronic imaging device does not work, the force application member contacts and applies force to the force application member 30, the force application member 30 is forced to move downwards, the other end of the arm portion 32 of the force application member 30 moves into the movement track of the guide portion 591, and the fourth elastic member 80 is compressed in the process of moving the force application member 30; along with the rotation of the second coupling 59, the other end of the arm portion 32 is brought into contact with the guide surface 5911 and relatively slides along the guide surface 5911, pushing force is formed on the guide portion 591, thereby pushing the entire second coupling 59 to move in a direction approaching the end surface of the developing unit 10, the second coupling 59 is disengaged from the driving head of the electronic imaging device, the second coupling 59 cannot receive the driving force, and the developing roller also stops rotating, so that the developing roller does not continue to rub against the photosensitive drum 22 when the electronic imaging device is not operating, and an effect is achieved that wear can be avoided even if the developing roller is not separated from the photosensitive drum 22. When the second coupling 59 moves in a direction approaching the end face of the developing unit 10, the third elastic member 70 is compressed when the second coupling 59 moves, when the electronic imaging device starts to operate, the acting force of the force application member on the push member 30 is removed, the elastic deformation of the fourth elastic member 80 is recovered, the push member 30 is driven to move and reset, the movement track of the other end of the arm portion 32 of the push member 30, which is separated from the guide portion 591, is no longer propped against the guide portion 591, the elastic deformation of the third elastic member 70 is recovered, the second coupling 59 is driven to move in a direction separating from the end face of the developing unit 10, the second coupling 59 is meshed with the driving head of the electronic imaging device again, and receives driving force, and the processing box starts to operate.

Further, as shown in fig. 16 to 18, the process cartridge further includes a first conductive member 91 and a second conductive member 92, the first conductive member 91 and the second conductive member 92 are each elongated conductive steel sheets, and the lengths of the first conductive member 91 and the second conductive member 92 are substantially equivalent to the length of the process cartridge and can extend from the non-driving end to the driving end of the process cartridge.

As shown in fig. 17, the first conductive member 91 and the second conductive member 92 are both mounted on the non-driving end bracket 16, specifically, the first ends of the first conductive member 91 and the second conductive member 92 in the length direction are mounted on the non-driving end bracket 16, and the first ends of the first conductive member 91 are also in contact with the steel shaft of the developing roller, the first ends of the second conductive member 92 are also in contact with the doctor blade, the first ends of the first conductive member 91 and the first ends of the second conductive member 92 are not in contact, and the first ends of the second conductive member 92 are in contact with the conductive terminal of the electronic imaging device. The first ends of the first conductive member 91 and the second conductive member 92 are bent one or more times to be capable of fitting the surface mounting of the non-driving end bracket 16 and extend to the corresponding positions to be in contact with the developing roller and the powder discharge blade. The first conductive member 91 and the second conductive member 92 extend to the vicinity of the urging member 30 at the second ends in the length direction.

The first conductive member 91 and the second conductive member 92 have an on state and an off state, and are in the on state when the second end of the first conductive member 91 contacts the second end of the second conductive member 92, so that voltages can be supplied to the developing roller and the doctor blade.

In the on state, the developing roller is charged, and is capable of adsorbing the developer and transferring the developer to the photosensitive drum 22 by the potential difference; after the powder outlet knife conducts electricity, more charges can be carried on the developer, the developing roller can absorb more, and meanwhile, when the knife edge contacts and rubs with the developing roller, the thickness of the adjusted developer layer is more uniform.

The second end of the first conductive member 91 is in an off state when separated from the second end of the second conductive member 92, at which time the developing roller is no longer charged, and the developing roller cannot absorb the developer nor transfer it to the photosensitive drum 22 by the potential difference.

In the present embodiment, the on-state and off-state switching of the first conductive member 91 and the second conductive member 92 is controlled by the movement of the urging member 30. Specifically, the pressing block 31 of the pushing member 30 may contact the second end of the second conductive member 92, or may contact the second end of the first conductive member 91, where in a state where no external force is applied, the pressing block 31 of the pushing member 30 does not apply a force to the first conductive member 91 or the second conductive member 92, and cannot separate the first conductive member 91 and the second conductive member 92, and they are in a connected state. When the urging member 30 receives the urging force of the urging member to move, the pressing block 31 urges the second end of the second conductive member 92 to move so as to be separated from the second end of the first conductive member 91, and the first conductive member 91 and the second conductive member 92 are turned from the on state to the off state.

When the electronic imaging device does not work, the force application part applies force to the force pushing part 30 to enable the force pushing part 30 to move, the pressing block 31 of the force pushing part 30 pushes the second conductive part 92 to move to be separated from the first conductive part 91, a circuit is disconnected, and the developing roller is powered off; meanwhile, the arm part 32 of the pushing member 30 is forced to move into the movement track of the guide part 591, interference occurs with the guide part 591, the second coupler 59 is pushed to move towards the direction close to the end face of the developing unit 10, the second coupler 59 is separated from the driving head of the electronic imaging device, no driving force is received, at the moment, the developing roller is neither electrified nor rotated, the developer on the developing roller cannot be transferred onto the photosensitive drum through the potential difference, and the developing roller stops rotating to prevent friction with the photosensitive drum.

When the electronic imaging device works, the acting force of the force application part is removed, the pushing part 30 is reset under the acting force of the fourth elastic part 80, the pressing block 31 does not push the second conductive part 92 any more, the second end of the second conductive part 92 is contacted with the second end of the first conductive part 91, the circuit is contacted, and the developing roller is electrified; at the same time, the arm 32 of the pushing member 30 is also separated from the movement track of the guide portion 591, no interference with the guide portion 591 occurs, the second coupling 59 moves away from the end face of the developing unit 10 under the action of the third elastic member 70, and is engaged with the driving head of the electronic imaging device again, and receives the driving force to operate.

Example six

The drive assembly of this embodiment is the same as that of the fourth embodiment, and has a double drive structure, and the first coupling 51 drives only the photosensitive drum 22 and the second coupling 59 drives the powder feeding roller and the developing roller 15.

As shown in fig. 21 to 23, in the present embodiment, the driving end bracket 12 is provided with a first through hole 122, the end cover 60 of the driving end is provided with a second through hole 64 coaxial with the first through hole 122, and a part of the second coupling 59 sequentially passes through the first through hole 122 and the second through hole 64 to protrude to the outside of the end cover 60. The second coupling 59 is located at a position substantially in the middle of the developing unit 10 in the height direction, and correspondingly, the first through hole 122 is also located at a position substantially in the middle of the drive end bracket 12, and the inner diameter of the first through hole 122 is smaller than the inner diameter of the second through hole 64.

As shown in fig. 21, in the present embodiment, the process cartridge includes a second connecting portion for enabling the developing unit 10 to move between a first position and a second position with respect to the drum unit 20; in the first position, the developing roller 15 is in contact with the photosensitive drum 22; in the second position, the developing roller 15 is separated from the photosensitive drum 22. The second connecting portion does not overlap the second coupling 59 as viewed in the axial direction of the developing roller 15.

As shown in fig. 21 and 22, in the present embodiment, the second connecting portion includes the support column 121d and the guide portion 63, and the support column 121d is provided in the vicinity of one end of the drive end bracket 12 in the height direction, specifically, at a position on the end face of the drive end bracket 12 near the lower end thereof. The end cap 60 is provided with a guide 63 that mates with a support post 121d, the support post 121d moving within the confines of the guide 63. Specifically, the support column 121d is a cylindrical member formed on the end surface of the driving end bracket 12, preferably cylindrical, and may be other polygonal prismatic structures; the guide 63 is a through hole or a through groove formed in the end cover 60, which is an arc-shaped hole or an arc-shaped groove, and the support column 121d is embedded in the guide 63 when assembled, and the range of the guide 63 defines the moving range of the support column 121d, that is, the range of the swing of the developing unit 10 with respect to the drum unit 20.

In the present embodiment, the swing axis of the developing unit 10 is approximately the center position in the height direction thereof, and is also the rotation center of the second coupling 59. When the developing unit 10 is located at the first position, the lower end of the developing unit 10 is close to the lower end of the drum unit 20, so that the developing roller 15 can contact the photosensitive drum 22, and the supporting column 121d is located at one end inside the guide portion 63; when the developing unit 10 moves from the first position to the second position under the urging force of the urging member 30, the supporting column 121d moves from one end to the other end thereof in the guide portion 63, and the lower end of the developing unit 10 swings in a direction away from the drum unit 20, driving the developing roller 15 to separate from the photosensitive drum 22.

Further, as shown in fig. 22 and 23, the drive end bracket 12 is further provided with an annular flange 123, the annular flange 123 surrounds the periphery of the first through hole 122, the annular flange 123 can protrude from the second through hole 64 to the outside of the end cover 60, a gap is provided between the annular flange 123 and the second through hole 64, and when the developing unit 10 moves from the first position to the second position under the urging force of the urging member 30, the annular flange 123 is not in contact with the second through hole 64. The annular flange 123 and the first through hole 122 are also spaced, the inner diameter of the annular flange 123 can adapt to the size of the driving head of the electronic imaging device, when the driving head of the electronic imaging device axially extends out to be meshed with the second coupling 59, a part of the driving head extends into the space between the annular flange 123 and the first through hole 122, and the annular flange 123 is sleeved on a part of the driving head, so that a certain supporting and positioning effect can be achieved.

Further, as shown in fig. 22 and 23, the end of the annular flange 123 away from the developing unit 10 is provided with a guiding surface 1231, and the guiding surface 1231 is an inclined surface, which can play a guiding role when the driving head of the electronic imaging device is engaged with the second coupling 59, so that the engagement of the driving head and the second coupling is smoother, and the engagement time is shortened.

Other structures of the process cartridge of the present embodiment are the same as those of the fourth embodiment, and will not be described here again.

Example seven

The present embodiment is basically the same as the sixth embodiment described above in that: the end caps are different in structure.

Referring to fig. 24 and 25, the process cartridge is substantially in the shape of a rectangular parallelepiped having a length in a first direction (A1 and A2 directions), a width in a second direction (B1 and B2 directions), and a height in a third direction (C1 and C2 directions); the one end of the process cartridge in the A1 direction is the driving end, the one end in the A2 direction is the conductive end, the developing unit 100 and the drum unit 200 are oppositely arranged in the second direction, the direction from the developing unit 100 toward the drum unit 200 is the B1 direction, the one end of the process cartridge in the B1 direction is the front end, the direction from the drum unit 200 toward the developing unit 100 is the B2 direction, the one end in the B2 direction is the rear end, the one end of the process cartridge in the C1 direction is the upper end, and the one end in the C2 direction is the lower end.

The length direction of the developing frame 110 extends along the first direction (A1 and A2 directions), the two ends of the developing frame 110 in the length direction (A1 and A2 directions) are respectively provided with a driving side bracket 120 and a conductive side bracket, the stirring frame, the powder feeding roller and the developing roller are rotatably supported on the driving side bracket 120 and the conductive side bracket at the two ends of the developing frame 110 in the length direction, the stirring frame, the powder feeding roller and the developing roller can rotate under the action of the driving component, and the axial directions of the stirring frame, the powder feeding roller and the developing roller are all along the length direction (the first direction) of the developing frame 110. 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 and is adsorbed by the charged developing roller.

As shown in fig. 24 and 25, both ends of the photosensitive frame 210 in the first direction are provided with end caps, respectively, a driving-side end cap 220 fixedly provided at one end of the photosensitive frame 210 in the A1 direction and a conductive-side end cap 230 fixedly provided at one end of the photosensitive frame 210 in the A2 direction. The photosensitive drum is rotatably supported on the driving-side end cap 220 and the conductive-side end cap 230, and specifically, the photosensitive drum is disposed on the lower end side (C2-direction side) of the photosensitive frame 210 in the height direction.

As shown in fig. 24 to 26, the driving assembly includes a first coupling 310, a second coupling 320, a developing roller gear 330, a powder feeding roller gear 340 and a stirring frame gear, and may be disposed at one or both ends of the cartridge body in a first direction (length direction), in this embodiment, the driving assembly is disposed at the same end of the developing unit 100 in the length direction, preferably at the driving end (one end in A1 direction). The first coupling 310 is disposed at one end of the photosensitive drum in the A1 direction, and is configured to engage with a photosensitive driving head of the electronic imaging device to receive a driving force to rotate the photosensitive drum. The second coupling 320, the developing roller gear 330, the powder feeding roller gear 340, and the stirring rack gear are disposed at the outer side of the driving side bracket 120, specifically, a supporting hole for supporting the second coupling 320 is provided on the driving side bracket 120, the second coupling 320 is for engaging with a developing driving head of the electronic imaging device and receiving a driving force, and the second coupling 320 is located at a position substantially in the middle of the developing unit 100 in the third direction; the developing roller gear 330 is sleeved at one end of the shaft of the developing roller, which extends out of the driving side bracket 120, the powder feeding roller gear 340 is sleeved at one end of the shaft of the powder feeding roller, which extends out of the driving side bracket 120, the stirring frame gear is sleeved at one end of the stirring frame, which extends out of the driving side bracket 120, and the developing roller gear 330, the powder feeding roller gear 340 and the stirring frame gear are directly or indirectly meshed with the second coupling 320, so that the second coupling 320 transmits the received driving force, and the developing roller, the powder feeding roller and the stirring frame are driven to rotate. In the third direction, the second coupling 320 is located on the upper side (C1 direction side) of the first coupling 310.

As shown in fig. 24 to 26, a developing protecting cover 130 is further provided on the outer side of the driving side bracket 120, and the developing protecting cover 130 covers the developing roller gear 330, the powder feeding roller gear 340, the stirring frame gear, and a part of the second coupling 320, so that the driving assembly can be protected. Specifically, the developing protecting cover 130 is provided with a cylindrical portion 131, the cylindrical portion 131 protrudes along a side away from the developing frame 110, a third through hole 132 is formed in the interior of the cylindrical portion 131, an axial direction of the third through hole 132 extends in the first direction, and a portion of the second coupling 320 extends from the third through hole 132 to the outside of the developing protecting cover 130.

As shown in fig. 26 and 27, the developing cover 130 is further provided with an annular flange 123, and the annular flange 123 surrounds the periphery of the cylindrical portion 131. The annular flange 123 and the cylindrical portion 131 have a space therebetween, the inner diameter of the annular flange 123 is capable of adapting to the size of a developing drive head of the electrophotographic apparatus, and when the developing drive head of the electrophotographic apparatus axially protrudes to engage with the second coupling 320, a part of the developing drive head protrudes into the space between the annular flange 123 and the cylindrical portion 131, and the annular flange 123 is capable of engaging a part of the developing drive head, thereby playing a role in supporting and positioning.

Further, as shown in fig. 26 and 27, the end of the annular flange 123 away from the developing unit 100 is provided with a guiding surface 134, and the guiding surface 134 is an inclined surface, which can play a guiding role when the developing drive head of the electronic imaging device is engaged with the second coupling 320, so that the engagement of the two is smoother, and the engagement time is shortened.

As shown in fig. 24 to 26 and 28, the conductive side cover 230 is disposed outside the conductive side frame, the driving side cover 220 is disposed outside the developing cover 130, and the driving side cover 220 is at least partially overlapped with the developing cover 130 as viewed along the longitudinal direction of the process cartridge. The driving-side end cap 220 and the conductive-side end cap 230 each cover at least a portion of the ends of the photosensitive frame 210 and the developing frame 110, respectively. The driving-side end cap 220 is fixedly connected with an end of the photosensitive frame 210.

As shown in fig. 24 to 26 and 28, the driving-side end cap 220 is provided with a first through hole 221 and a notch 222, and when the driving-side end cap 220 is mounted on the ends of the developing frame 110 and the photosensitive frame 210, a portion of the first coupling 310 is exposed through the first through hole 221 and a portion of the second coupling 320 is exposed through the notch 222, so that the coupling is engaged with the driving head of the electronic image forming apparatus to receive the driving force. The notch 222 extends upward and rearward from a position corresponding to the second coupling 320 to the upper and rear ends of the driving-side end cap 220, i.e., a hollow portion is hollowed out in the driving-side end cap 220, so that the projection of the notch 222 in the axial direction of the developing roller is larger than the projection of the second coupling 320 in the axial direction of the developing roller, thereby exposing most of the developing protecting cover 130 through the notch 222, and the structure inside the process cartridge (especially the internal structure of the developing unit 100) can be observed to some extent through the notch 222, and in case of partial maintenance, the maintenance can be realized without dismantling the driving-side end cap 220, and the maintenance is more convenient. After the driving-side cap 220 is mounted in place, the annular flange 123 of the developing cover 130 protrudes from the notched portion 222 of the driving-side cap 220 and protrudes from the surface of the driving-side cap 220, and the annular flange 123 is not in contact with the driving-side cap 220, i.e., the annular flange 123 is located entirely within the notched portion 222.

As shown in fig. 25 to 28, in the present embodiment, the process cartridge further includes a connecting portion, a restricting portion 224, a restricted portion 136, a urging member 400, and an elastic member 500 for effecting movement of the developing unit 100 relative to the drum unit 200 between a first position and a second position; in the first position, the developing roller is in contact with the photosensitive drum; in the second position, the developing roller is separated from the photosensitive drum. The connection portion does not overlap the second coupling 320 as viewed in the axial direction (first direction) of the developing roller.

As shown in fig. 25 to 28, in the present embodiment, the connecting portion includes the support post 135a and the guide portion 223, and the support post 135a is provided in the vicinity of one end of the developing protective cover 130 in the third direction, specifically, at a position on the end face of the developing protective cover 130 near the lower end thereof. The driving-side end cap 220 is provided with a guide portion 223 which is matched with the support column 135a, the support column 135a moves within the range of the guide portion 223, the guide portion 223 is positioned below the notch portion 222 in the third direction, the support column 135a corresponds to the guide portion 223 in position and is also positioned below the notch portion 222, namely, the connecting portion is always positioned below the notch portion 222 and has no overlapping portion with the notch portion 222 when being observed along the axial direction of the developing roller, and the second coupling 320 and the annular flange 123, the cylindrical portion 131 and the like on the developing protecting cover 130 are all within the range of the notch portion 222, so that the connecting portion and the second coupling 320 have no overlapping portion when being observed along the axial direction of the developing roller.

Specifically, as shown in fig. 27 and 28, the support column 135a is a cylindrical member formed on the end surface of the developing protecting cover 130, preferably a cylinder, and may be other polygonal prism structures; the guide portion 223 is a through hole or a through groove formed on the driving-side end cover 220, the through hole or the through groove being an arc-shaped hole or an arc-shaped groove, the guide portion 223 extending substantially in the second direction, the support column 135a being embedded in the guide portion 223 when assembled, the extent of the guide portion 223 defining the range of movement of the support column 135a, i.e., limiting the range of swinging of the developing unit 100 relative to the drum unit 200.

In this embodiment, as shown in fig. 25 to 28, a limiting portion 224 is disposed at a position of the driving side end cover 220 near the upper edge of the notch portion 222, that is, the upper end of the driving side end cover 220 is provided with a limiting portion 224 beside the notch portion 222, the limiting portion 224 is a protrusion formed on the inner wall of the driving side end cover 220, and the limiting portion 224 extends along the A2 direction; the developing protecting cover 130 is provided with a limited portion 136 which is matched with the limiting portion 224, the limited portion 136 is a protrusion formed on the outer wall of the developing protecting cover 130, the limited portion 136 extends along the direction A1, the limiting portion 224 is contacted with the limited portion 136 when the developing unit 100 moves from the second position to the first position, in the second direction, the limiting portion 224 is positioned at the rear side (one side along the direction B2) of the limited portion 136, and the limiting portion 224 is contacted with the limited portion 136 to play a limiting role to prevent the developing unit 100 from deviating from the first position. When the developing unit 100 is located at the first position, the lower end of the developing unit 100 is close to the lower end of the drum unit 200, so that the developing roller can be brought into contact with the photosensitive drum, and the supporting column 135a is located at one end in the B1 direction within the guide portion 223; when the developing unit 100 is moved from the first position to the second position by the force of the electrophotographic apparatus, the supporting column 135a moves from one end in the B1 direction to one end in the B2 direction in the guide portion 223, and the lower end of the developing unit 100 swings in a direction away from the drum unit 200 (substantially in the B2 direction), driving the developing roller to separate from the photosensitive drum, while the upper end of the developing unit 100 swings in a direction approaching the drum unit 200 (substantially in the B1 direction), and the restricted portion 136 moves in the B1 direction with it to separate from the restricting portion 224.

As shown in fig. 26, the movement of the developing unit 100 from the first position to the second position is achieved by the cooperation of the urging member 400 and the urging member in the electronic imaging device. Specifically, the developing unit 100 is provided with a pushing member 400 at one or both ends in the length direction, the pushing member 400 is rotatably disposed on an end surface of the developing unit 100, the pushing member 400 is in a shape of a bar arm, one end of the pushing member is hinged to the developing unit 100, and the other end of the pushing member can drive the developing unit 100 to move from the first position to the second position in a direction away from the drum unit 200 when receiving the acting force of the force applying member, so that the developing roller is separated from the photosensitive drum.

In this embodiment, the pushing member 400 may be hinged to the lower end of the developing protecting cover 130, or the pushing member 400 may not be disposed on the developing protecting cover 130, the end surface of the developing unit 100 is provided with a supporting shaft, and one end of the pushing member 400 is sleeved on the supporting shaft, so that the installation of the pushing member 400 can be completed. A portion of the free end of the urging member 400 is exposed from below to the outside of the developing frame 110, so that the urging member is brought into contact therewith from below, and an urging force is applied thereto.

As shown in fig. 25, an elastic member 500 is further disposed between the drum unit 200 and the developing unit 100, for moving the developing unit 100 from the second position to the first position, and bringing the developing roller into contact with the photosensitive drum. Specifically, one end of the elastic member 500 is connected to the upper end of the photosensitive frame 210, and the other end is connected to the upper end of the developing frame 110. The elastic member 500 is preferably a spring, and may be a member capable of providing elastic force, such as elastic rubber, elastic sponge, or elastic sheet.

When the electronic imaging device is not in operation, the force application member contacts the force application member 400 from below and applies force to the force application member, so that the force application member 400 rotates relatively around the connection end thereof, the lower end of the developing unit 100 swings away from the drum unit 200 (approximately along the direction B2) after being stressed, the developing roller is driven to separate from the photosensitive drum, the upper end of the developing unit 100 moves towards the photosensitive drum (approximately along the direction B1), and the compression elastic member 500 is compressed, and the restricted portion 136 moves along the developing unit 100 along the direction B1 and is separated from the restricting portion 224. Meanwhile, the support column 135a moves from one end in the B1 direction to one end in the B2 direction within the guide portion 223, and the connection portion plays a role in supporting and positioning during the movement of the developing unit 100.

When the electronic imaging device needs to work, the force applied by the force application member to the pushing member 400 is removed, and meanwhile, the elastic deformation of the elastic member 500 is recovered, so that the developing unit 100 is pushed to move from the second position to the first position, the developing roller is contacted with the photosensitive drum, and the pushing member 400 also returns to the original position along with the movement of the developing unit 100. Meanwhile, the support column 135a moves from one end in the B2 direction to one end in the B1 direction within the guide portion 223. The regulated portion 136 swings with the developing unit 100 to contact the regulating portion 224, so that the developing unit 100 is maintained at the first position.

The annular flange 123 on the developing cover 130 and the drive side end cap 220 are not in contact at all times during movement of the developing unit 100 relative to the drum unit 200, i.e., the annular flange 123 does not contact the drive side end cap 220 whether the developing unit 100 is in the first or second position.

Example eight

The present embodiment is basically the same as the process cartridge of the seventh embodiment in that: the end caps are different in structure.

As shown in fig. 29 to 32, in the present embodiment, the restricting portion 224 is omitted from the driving-side end cover 220, the restricted portion 136 is omitted from the developing cover 130, and the notch portion is set as the second through hole, that is, the driving-side end cover 220 is provided with the first through hole 221 and the second through hole 225, a part of the first coupling 310 is exposed through the first through hole 221, a part of the second coupling 320 is exposed from the second through hole 225, and the projection of the second through hole 225 is larger than the projection of the second coupling 320 in the developing roller axial direction. The first through hole 221 is a circular hole, the second through hole 225 is a substantially elliptical hole, and in the third direction, the first through hole 221 and the second through hole 225 have overlapping portions. The second coupling 320 and the annular flange 123, the cylindrical portion 131, and the like on the developing cover 130 are all within the range of the second through hole 225, and the connection portion is located on the lower side of the second through hole 225, and therefore, there is no overlapping portion of the connection portion and the second coupling 320 as viewed in the axial direction of the developing roller.

The annular flange 123 on the developing cover 130 is not in contact with the inner edge of the second through hole 225 at all times during the movement of the developing unit 100 relative to the drum unit 200, i.e., the annular flange 123 does not contact the inner edge of the second through hole 225 regardless of whether the developing unit 100 is in the first position or the second position.

In the present embodiment, as shown in fig. 31, the developing roller gear 330 is engaged with the second coupling 320, the rotation axis of the developing roller gear 330 is located on the lower side of the rotation axis of the second coupling 320 in the third direction, and the rotation axis of the developing roller gear 330 is located on the front side of the rotation axis of the second coupling 320 in the second direction. The developing roller gear 330 can be exposed through the second through hole 225, i.e., the developing roller gear 330 is located within the range of the second through hole 225, and the developing roller gear 330 has no overlapping portion with the driving-side end cap 220 as viewed in the axial direction (first direction) of the developing roller.

During the movement of the developing unit 100 relative to the drum unit 200, the developing roller gear 330 moves along with the movement of the developing roller gear 330, and the movement track of the developing roller gear 330 generally reciprocates along the second direction, and the developing roller gear 330 is always located within the range of the second through hole 225, i.e., the projection of the developing roller gear 330 completely falls within the projection of the second through hole 225 when viewed along the axial direction of the developing roller, regardless of whether the developing unit 100 is located at the first position or the second position, and the developing roller gear 330 is always non-overlapping with the driving-side end cover 220.

Other structures and operation manners of the process cartridge in this embodiment are the same as those of the seventh embodiment, and will not be described here again.

Example nine

The present embodiment is basically the same in structure as the above embodiment, except that: during separation or contact of the developing roller and the photosensitive drum, the developing unit 100 as a whole does not move relative to the drum unit 200, but the photosensitive drum itself moves relative to the developing unit 100.

As shown in fig. 33 to 36, the photosensitive frame 210 is provided with integrally or separately formed photosensitive brackets 2101 at both ends in the first direction, and, for example, a driving side is provided on the photosensitive brackets 2101, and specifically, the first avoiding portions 2101a are substantially elliptical so that the first coupling 310 can move in the first avoiding portions 2101a when an external force perpendicular to the axial direction of the photosensitive drum is applied thereto; still be provided with the charge roller mounting structure on the photosensitive bracket 2101, wherein the charge roller mounting structure includes fifth elastic component 2102, elastic component setting portion 2101b and installation slider 2101c (as shown in fig. 36), and elastic component setting portion 2101b is used for installing fifth elastic component 2102, and installation slider 2101c is used for installing the charge roller and has first guide chute 2101d, and first guide chute 2101d block is in the lateral wall 2101e of photosensitive bracket 2101, and wherein, the both ends of charge roller are installed on installation slider 2101 c. An end cover is provided on the outside of the photosensitive frame 210 in the first direction of the photosensitive frame 2101, which is a driving-side end cover 220 fixedly provided at one end of the photosensitive frame 210 in the A1 direction and a conductive-side end cover 230 fixedly provided at one end of the photosensitive frame 210 in the A2 direction, respectively. The driving side end cover 220 and the conductive side end cover 230 are respectively provided with avoidance portions which are identical to those of the photosensitive bracket 2101 and can move in cooperation with the first coupling 310, and taking a driving side as an example, in some embodiments, the driving side end cover 220 is provided with a second avoidance portion 2201a which is approximately identical to the first avoidance portion 2101a of the photosensitive bracket 2101, the first coupling 310 is exposed through the first avoidance portion 2101a of the photosensitive bracket 2101 and the second avoidance portion 2201a of the driving side end cover 220, and the first coupling 310 can move in the two avoidance portions. Meanwhile, the non-driving side of the process cartridge is also provided with the same escape portion as the driving side. Accordingly, the photosensitive drum is rotatably supported on and movable relative to the driving-side end cover 220 and the conductive-side end cover 230, and the photosensitive drum is provided on the lower end side (C2-direction side) of the photosensitive frame 210 in the height direction.

Further, the driving side end cover 220 is disposed outside the photosensitive bracket 2101 and the developing protecting cover 130, and the driving side end cover 220, the photosensitive bracket 2101 and the developing protecting cover 130 are fixedly connected.

As shown in fig. 35, 37 and 38, the driving side bracket 120 and the developing cover 130 are provided with a push member 121 for receiving a force from the electronic image forming apparatus, a sixth elastic member 122a, and a mounting portion 123a for mounting the sixth elastic member, the push member 121 including a force receiving portion 121a, a force applying portion 121b, and a projection 121c. The urging member 121 is mounted on the mounting portion 123a of the driving-side bracket 120 through the sixth elastic member 122a, and the urging portion 121b of the urging member 121 abuts against the photosensitive drum end to apply the urging member 121 to the photosensitive drum through the urging portion 121b after receiving the urging force from the electronic image forming apparatus through the force receiving portion 121 a; the pushing member 121 is further provided with a protrusion 121c, and the developing protecting cover 130 is provided with a second guide chute 130c cooperating with the protrusion 121c, so that the protrusion 121c can move in the third direction in the second guide chute 130c when the pushing member 121 is subjected to an external force. The force receiving part 121a is a force receiving inclined plane, when the electronic imaging device applies horizontal force to the force receiving part 121a, the force receiving inclined plane breaks down the horizontal force, and the component force in the direction C1 makes the pushing piece 121 move along the direction C1 in the second guide chute 130C; the tail of the urging member 121 (the other side opposite to the force receiving portion 121a in the second direction) abuts against the driving-side bracket 120 to restrict the position of the urging member 121. In some embodiments, the fifth elastic member 2102 and the sixth elastic member 122a may be springs, or may be elastic rubber, elastic sponge, elastic sheet, or other components capable of providing elastic force.

In the working process of the electronic imaging equipment, the developing roller and the photosensitive drum need to be in tight contact, when the electronic imaging equipment does not work, the developing roller and the photosensitive drum need to be separated by a certain distance, and the problems that the photosensitive drum is polluted by redundant developer attached to the developing roller or the developing roller deforms or the photosensitive drum is worn and the like due to long-time contact of the developing roller and the photosensitive drum are avoided.

Based on this, the photosensitive drum in the present embodiment is provided to be movable on the photosensitive frame 210 with respect to the developing roller itself, so that the developing roller and the photosensitive drum can be brought into contact when the electrophotographic image forming apparatus is in operation and separated when not in operation. When the process cartridge is mounted in the electronic image forming apparatus, the drum unit 200 abuts against a component in the electronic image forming apparatus, the drum unit 200 is not movable, the driving-side end cap 220 fixedly connects the developing unit 100 with the drum unit 200, and therefore the developing unit 100 is also not movable, the photosensitive drum is provided to be movable relative to the developing roller (i.e., relative to the drum unit 200 and the developing unit 100) between a first position at which the developing roller is in contact with the photosensitive drum, and a second position; when the photosensitive drum is at the second position, the developing roller is separated from the photosensitive drum.

As shown in fig. 35, when the process cartridge is in the initial position for loading into the electronic image forming apparatus, the photosensitive drum is in contact with the developing roller, at this time the fifth elastic member 2102 is in the initial state, the projection 121C of the urging member 121 is positioned at the C2-directional end of the second guide chute 130C on the developing cover 130, the urging portion 121b of the urging member 121 is not abutted against the photosensitive drum, the first coupling 310 is positioned at the C2-directional end of the escape portion, the charging roller is abutted against the photosensitive drum, and the sixth elastic member 122a is in the initial state.

When the process cartridge does not perform a developing operation, the force receiving portion 121a receives a force applied from the electronic image forming apparatus to the urging member 121, the urging member 121 moves along the C1 direction in the second guide groove 130C on the developing cover 130 following the protrusion 121C, at this time, the sixth elastic member 122a compresses, the force applying portion 121B of the urging member 121 abuts against the photosensitive drum and applies force to the photosensitive drum, the first coupling 310 moves in the first avoiding portion 2101a of the photosensitive bracket 2101 and the second avoiding portion 2201a of the driving side cover 220 in a direction away from the developing roller (substantially in the C1 and B1 directions), and the photosensitive drum always maintains the abutting state with the charging roller, so that the first guide groove 2101d of the mounting slider 2101C of the charging roller mounting structure moves in the same direction as the photosensitive drum along the side wall 2101e under urging of the photosensitive drum, and the fifth elastic member 2102 is compressed, at this time, the photosensitive drum moves from the first position in contact with the developing roller to the second position separated from the developing roller.

When the process cartridge is required to perform the developing operation, the electronic image forming apparatus no longer applies a force to the urging member 121, and the projection 121C of the urging member 121 moves in the direction C2 to the initial position in the second guide groove 130C due to the reaction force of the sixth elastic member 122a from compression to release, at which time the photosensitive drum loses the force of the urging member 121 force applying portion 121B, and the first coupling 310 moves to the initial position in the first escape portion 2101a of the photosensitive bracket 2101 and the second escape portion 2201a of the driving-side end cap 220 (substantially in the directions C2 and B2) in the direction approaching the developing roller under the force of the self-weight and the charging roller mounting structure (fifth elastic member 2102), and at the same time the fifth elastic member 2102 returns to the initial state, at which time the photosensitive drum moves from the second position separated from the developing roller to the first position contacting the developing roller.

Examples ten

The present embodiment is basically the same in structure as the above embodiment, except that: the push member 400 is configured and operates in a different manner.

As shown in fig. 39 to 41, the conductive side cover 230 is provided outside the conductive side holder, the driving side cover 220 is provided outside the developing cover 130, and the driving side cover 220 is at least partially overlapped with the developing cover 130 as viewed along the longitudinal direction of the process cartridge. The driving-side end cap 220 and the conductive-side end cap 230 each cover at least a portion of the ends of the photosensitive frame 210 and the developing frame 110, respectively. The driving-side end cap 220 is fixedly connected with an end of the photosensitive frame 210.

As shown in fig. 41, in the present embodiment, a first through hole 221 and a second through hole 222a are provided in the driving-side end cap 220, and when the driving-side end cap 220 is mounted on the ends of the developing frame 110 and the photosensitive frame 210, the first coupling 310 is exposed through the first through hole 221 and the second coupling 320 is exposed through the second through hole 222a, so that the coupling is engaged with the driving head of the electronic imaging device to receive the driving force. On the developing frame 110 side, the second coupling 320, the cylindrical portion 131, and the second through hole 222a are coaxially provided, and at least a part of the cylindrical portion 131 is inserted into the second through hole 222 a.

In the process of the operation of the electronic imaging device, the developing roller 140 needs to be in tight contact with the photosensitive drum 240, and when the electronic imaging device does not operate, the developing roller 140 needs to be separated from the photosensitive drum 240 by a certain distance, so that the problems that the photosensitive drum 240 is polluted by the redundant developer attached to the developing roller 140 or the developing roller 140 is deformed or the photosensitive drum 240 is worn and the like due to long-time contact between the developing roller 140 and the photosensitive drum 240 are avoided.

Based on this, the drum unit 200 and the developing unit 100 in the present embodiment are provided to be relatively movable, so that the developing roller 140 and the photosensitive drum 240 can be brought into contact when the electronic imaging device is operated and separated when not operated. When the process cartridge is mounted in the electronic image forming apparatus, the drum unit 200 abuts against a component in the electronic image forming apparatus, the drum unit 200 is not movable, the developing unit 100 is provided to be movable between a first position and a second position with respect to the drum unit 200, and the developing roller 140 is in contact with the photosensitive drum 240 when the developing unit 100 is in the first position; when the developing unit 100 is at the second position, the developing roller 140 is separated from the photosensitive drum 240. In this embodiment, the developing unit 100 swings with the axis of the second coupling 320 as the rotation center, that is, when the developing unit 100 is located at the first position, the lower end of the developing unit 100 is close to the lower end of the drum unit 200, so that the developing roller 140 can contact the photosensitive drum 240, and at this time, the upper end of the developing unit 100 is located at a position far from the drum unit 200; when the developing unit 100 moves from the first position to the second position, the lower end of the developing unit 100 swings away from the drum unit 200, driving the developing roller 140 to separate from the photosensitive drum 240, and at this time, the upper end of the developing unit 100 swings toward the drum unit 200.

As shown in fig. 39 to 42, in the present embodiment, the process cartridge further includes a urging member 400, by which the urging member 400 cooperates with a force application member 300 (shown in fig. 47) in the electronic image forming apparatus to realize separation of the developing roller 140 from the photosensitive drum 240 when no developing operation is performed.

As shown in fig. 41, the urging member 400 is movably disposed in the developing unit 100, and the urging member 400 can rotate between a working position and a retracted position; specifically, the urging member 400 is rotatably mounted at the lower end (one end in the C2 direction) of the developing protecting cover 130, the urging member 400 is a substantially elongated block member, the length direction of which extends along the second direction, and the urging member 400 includes a main body 410, and the main body 410 is provided with a rotation blocking portion 420, a sliding avoiding surface 430 and an abutment surface 440.

As shown in fig. 41 to 43, the rotating portion 420 is disposed at one end of the main body 410 in the length direction, the developing protecting cover 130 is provided with a joint portion 133 matching with the rotating portion 420, preferably, the rotating portion 420 is a slot formed on the main body 410, the joint portion 133 is a clamping post disposed near the lower end of the developing protecting cover 130, the axial direction of the clamping post extends along the third direction, after the rotating portion 420 is engaged with the clamping post, the pushing member 400 can rotate around the clamping post, that is, the pushing member 400 can rotate around the clamping post in a plane formed by the first direction and the second direction, that is, with the clamping post as an axis, one end of the pushing member 400 away from the rotating portion 420 can swing in the A1 direction or the A2 direction, wherein the pushing member can swing in the A2 direction to the avoiding position, and the pushing member 400 can swing in the A1 direction to the working position. Alternatively, the clamping and rotating part 420 may be a clamping column, and the engaging part 133 is a clamping groove, so that the urging member 400 and the developing protecting cover 130 can be rotationally connected; the through holes and the rotating shaft can be matched with each other.

As shown in fig. 43 and 45 to 47, the surface of one end of the developing protecting cover 130 in the C2 direction is a lower surface 134, the lower surface 134 is a plane, and a groove is formed on the lower surface 134 for the urging member 400 to rotate in the groove, and the rotation range of the urging member 400 can be limited. The projection of the groove in the third direction is approximately the same as the projection of the pushing member 400 in the third direction, the rotating portion 420 of the pushing member 400 is close to one end of the groove in the B2 direction, the inner surface of the groove in the B1 direction is the first side wall 136a, and the inner surface of the groove in the A1 direction is the second side wall 137. When the urging member 400 contacts the second side wall 137, its swing in the A1 direction is stopped, and a position where the urging member 400 contacts the second side wall 137 is also referred to as an operating position of the urging member 400, at which the urging member 400 receives the separating force of the urging member 300 to separate the developing roller 140 from the photosensitive drum 240, and the urging member 400 is also in its initial state in the operating position. When the end of the pushing member 400 away from the locking portion 420 rotates in the direction A2, the pushing member 400 rotates from the working position to the retracted position.

As shown in fig. 42 and 44, at least a portion of the main body 410 of the urging member 400 protrudes downward from the lower surface 134 of the developing protecting cover 130, and a sliding avoiding surface 430 is provided on the main body 410, and all or at least a portion of the sliding avoiding surface 430 protrudes downward from the recess to a lower side of the lower surface 134, so that the sliding avoiding surface 430 can cooperate with the urging member 300 of the electronic imaging device.

As shown in fig. 45, in this embodiment, when the urging member 400 is assembled on the developing protecting cover 130, the sliding avoiding surface 430 faces approximately toward the A1 direction, the sliding avoiding surface 430 is an arc surface protruding outwards, the extending direction of the sliding avoiding surface 430 forms a certain angle with the extending direction of the urging member 400, the angle is an acute angle, and the extending direction of the sliding avoiding surface 430 extends approximately from the A2 side and the B2 side to the A1 side and the B1 side. Alternatively, the sliding avoidance surface 430 may be planar; the sliding relief surface 430 may also be an irregular surface formed by one or more arcuate surfaces and/or flat surfaces that are spliced together. The extending direction of the urging member 400 is perpendicular to the axis of the photosensitive drum 240.

As shown in fig. 42, 44 and 45, the urging member 400 further has an abutment surface 440, the abutment surface 440 is located at an end of the main body 410 away from the rotating portion 420, the abutment surface 440 is located at one side of the sliding avoidance surface 430 in the B1 direction, the abutment surface 440 is connected to one end of the sliding avoidance surface 430 in the B1 direction, the abutment surface 440 is substantially oriented in the B1 direction, the abutment surface 440 may be a plane, and all or at least a portion of the abutment surface 440 protrudes downward from the lower surface 134 of the developing protecting cover 130, so that the abutment surface 440 can contact the urging member 300 to receive the separating force. When the urging member 400 is in the operation position, the lowermost end (one end in the C1 direction) of the abutment surface 440 is spaced from the lower surface 134 of the developing cover 130 by a distance H1, preferably 3 mm.ltoreq.h1.ltoreq.4.8 mm in the third direction; in the second direction, the abutment surface 440 is spaced from the first sidewall 136a of the recess by a distance D1, preferably 0 < D1.ltoreq.2.5 mm. When the urging member 400 is in the range of H1 and D1, the urging member 400 can be more precisely engaged with the urging member 300, so that the selectivity of the urging member 400 can be increased to meet the optimization of the size of the parts.

Further, as shown in fig. 41, the process cartridge further includes a restoring member 600 for applying a force to the urging member 400 to restore the urging member 400 from the retracted position to the operating position, the restoring member 600 having elasticity, and the restoring member 600 being compressed when the urging member 300 urges the urging member 400 to rotate. Preferably, the reset element 600 is a torsion spring, and is mounted on the driving side bracket 120, specifically, a mounting seat 121 for mounting the torsion spring is disposed at a position of the driving side bracket 120 near the lower end, a loop portion of the torsion spring is sleeved on the mounting seat 121, one arm of the torsion spring is abutted on the driving side bracket 120, the other arm is abutted on one side of the main body 410 of the pushing element 400 facing the A2 direction, and the torsion spring is configured to always apply a force facing the A1 direction to the pushing element 400, so that the pushing element 400 is kept in a working position (i.e. an initial state of the pushing element 400) under the action of no other external force. Alternatively, the restoring member 600 may be other elastic members such as a compression spring, an extension spring, elastic rubber, and elastic sponge, or may be other restoring structures adopting an inelastic manner.

As shown in fig. 39, an elastic member 500 is further disposed between the drum unit 200 and the developing unit 100, for moving the developing unit 100 from the second position to the first position, and bringing the developing roller 140 into contact with the photosensitive drum 240. Specifically, one end of the elastic member 500 is connected to the upper end (one end in the C1 direction) of the photosensitive frame 210, and the other end is connected to the upper end (one end in the C1 direction) of the developing frame 110. The elastic member 500 is preferably a spring, and may be a member capable of providing elastic force, such as elastic rubber, elastic sponge, or elastic sheet.

As shown in fig. 46 and 47, after the process cartridge is mounted in place in the image forming apparatus, the urging member 400 is at the working position at this time, the urging member 300 of the electronic image forming apparatus starts to move, when the urging member 300 moves in the direction B1, the urging member 300 contacts the sliding avoidance surface 430, the urging member 300 slides along the sliding avoidance surface 430 and applies an urging force to the sliding avoidance surface 430, the urging member 400 swings around the joint 133 in the direction A2, the urging member 400 swings from the working position to the avoidance position, the urging member 300 can continue to move in the direction B1, the reset member 600 is compressively deformed, when the urging member 300 moves to a position separated from the sliding avoidance surface 430, the urging force of the urging member 300 to the sliding avoidance surface 430 disappears, the elastic deformation of the reset member 600 returns, the urging member 400 swings in the direction A1, the urging member 400 swings from the avoidance position to the working position, and the abutment surface 440 of the urging member 400 and the urging member 300 at this time are opposite to the urging member 300, that is at least partially overlapped in the second direction, but the urging member 300 and the abutment surface 440 does not contact the image forming apparatus, and the image forming apparatus is ready for developing.

When the electronic imaging device does not perform development work, the force application member 300 moves towards the direction B2, the force application member 300 contacts with the abutting surface 440 and applies force to the abutting surface 440, the force received by the abutting surface 440 acts on the whole developing unit 100 via the force application member 400, the lower end of the developing unit 100 swings towards the direction away from the drum unit 200 (approximately along the direction B2) after being stressed, the developing unit 100 moves from the first position to the second position, the developing roller 140 is driven to separate from the photosensitive drum 240, and meanwhile, the upper end of the developing roller 140 moves towards the direction close to the photosensitive drum 240 (approximately along the direction B1) to compress the elastic member 500.

When the electronic imaging device needs to perform development, the force applied by the force application member 300 to the abutment surface 440 is removed, the deformation of the elastic member 500 is recovered, the developing unit 100 is pushed to move from the second position to the first position, and the developing roller 140 is in contact with the photosensitive drum 240, so that development can be performed.

Example eleven

The present embodiment is basically the same as the process cartridge of the tenth embodiment in that: the structure of the urging member 400 is different.

As shown in fig. 48 to 50, in the present embodiment, the urging member 400 includes a click portion 420, a sliding avoiding surface 430, and an abutment surface 440, wherein the structure of the click portion 420 is the same as that of the embodiment.

As shown in fig. 50, in this embodiment, the sliding avoidance surface 430 is an inward concave arc surface. The differently shaped sliding relief surfaces 430 allow the pusher member 400 to be adapted to different types of force members 300 of electronic imaging devices.

As shown in fig. 51 and 52, in the present embodiment, when the urging member 400 is in the working position, in the third direction, the distance between the lowest end (one end in the C1 direction) of the abutment surface 440 and the lower surface 134 of the developing protecting cover 130 is H2, preferably, 4.8mm < H2 is less than or equal to 6.5mm; in the second direction, the abutment surface 440 is spaced from the first sidewall 136a of the recess by a distance D2, preferably 2.5mm < D2.ltoreq.4.7 mm. In the present embodiment, H2> H1, D2> D1, that is, the distance that the abutment surface 440 of the urging member 400 of the present embodiment protrudes from the lower surface 134 is greater than the distance that the abutment surface 440 of the urging member 400 of the tenth embodiment protrudes from the lower surface 134; and the distance from the abutting surface 440 of the pushing member 400 to the first side wall 136a is greater than the distance from the abutting surface 440 of the pushing member 400 to the first side wall 136a in the tenth embodiment, that is, the distance from the abutting surface 440 of the pushing member 400 to the rotation axis of the pushing member 400 in the present embodiment is shorter than the distance from the abutting surface 440 of the pushing member 400 to the axis of the pushing member 400 in the tenth embodiment.

By providing the abutment surfaces 440 with different distances from the lower surface 134 and different distances from the abutment surfaces 440 to the rotation axis, the urging member 400 can be adapted to the urging members 300 of different types of electronic imaging devices, thereby improving the versatility of the urging member 400.

The shape of the sliding avoiding surface 430, the position of the contact surface 440, the height, and other parameters may be adjusted according to the specific structure of the force application member 300, as long as the corresponding functions are realized.

Other structures and operation manners of the process cartridge of the present embodiment are the same as those of the embodiment, and are not described herein.

Example twelve

The present embodiment is basically the same in structure as the tenth embodiment described above, except that: the push member 400 is configured and operates in a different manner.

As shown in fig. 53 to 59, the urging member 400 is a substantially elongated block member, and the length direction thereof extends along the second direction, that is, the extending direction of the length of the urging member 400 is perpendicular to the axis of the photosensitive drum 240, and the urging member 400 includes a main body 410, and the main body 410 is provided with a locking portion 420, a sliding avoiding surface 430 and an abutment surface 440.

As shown in fig. 55 to 57, the rotating portion 420 is disposed at one end of the main body 410 in the height direction (C1 direction), the developing protecting cover 130 is provided with a joint portion 133 matching with the rotating portion 420, preferably, the rotating portion 420 is a slot formed on the main body 410, the joint portion 133 is a post disposed near the lower end of the developing protecting cover 130, the axial direction of the post extends along the second direction, after the rotating portion 420 is engaged with the post, the urging member 400 may rotate around the post, i.e. the urging member 400 may rotate around the post in a plane formed by the first direction and the third direction, the rotation axis of the urging member 400 is along the second direction, the rotation axis of the separating member is perpendicular to the axis of the photosensitive drum 240 (along the first direction), that is, the end of the urging member 400 away from the rotating portion 420 may swing in the A1 direction or the A2 direction, the direction toward the A1 may swing to the working position, and the end of the urging member 400 away from the rotating portion 420 may be closer to the working roller 140 than the other end of the rotating portion when the opposite direction is in the working position. Alternatively, the clamping and rotating part 420 may be a clamping column, and the engaging part 133 is a clamping groove, so that the urging member 400 and the developing protecting cover 130 can be rotationally connected; the through holes and the rotating shaft can be matched with each other.

As shown in fig. 54, at least a portion of the main body 410 of the pushing member 400 protrudes downward from the lower surface 134 of the developing protecting cover 130, and a sliding avoidance surface 430 is provided on the main body 410, and all or at least a portion of the sliding avoidance surface 430 protrudes downward from the recess to a lower side of the lower surface 134, so that the sliding avoidance surface 430 can be matched with the pushing member 300 of the electronic imaging device.

In this embodiment, when the urging member 400 is assembled on the developing protecting cover 130, the sliding avoiding surface 430 faces approximately in the A1 direction, the sliding avoiding surface 430 is a plane, and the sliding avoiding surface 430 extends in a plane formed by the second direction and the third direction.

In some other embodiments, the sliding avoidance surface may be an arc surface that protrudes outwards or is recessed inwards, the extending direction of the sliding avoidance surface 430 may form an included angle with the extending direction of the pushing member 400, and the included angle is an acute angle, and the extending direction of the sliding avoidance surface 430 extends from the A2 side and the B2 side to the A1 side and the B1 side. The sliding relief surface 430 may also be an irregular surface formed by one or more arcuate surfaces and/or flat surfaces that are spliced together.

As shown in fig. 54, 56 and 58, the urging member 400 further has an abutment surface 440, the abutment surface 440 is located at one end of the main body 410 in the length direction, the abutment surface 440 is located at one side of the sliding avoidance surface 430 in the B1 direction, the abutment surface 440 is connected to one end of the sliding avoidance surface 430 in the B1 direction, the abutment surface 440 faces approximately in the B1 direction, the abutment surface 440 is a straight surface, the abutment surface extends in a plane formed by the first direction and the third direction, that is, the abutment surface 440 is perpendicular to the rotation axis (in the second direction) of the urging member 400, and the abutment surface 440 is also perpendicular to the axis (in the first direction) of the photosensitive drum 240; and all or at least a portion of the abutment surface 440 protrudes downward from the lower surface 134 of the developer cover 130, such that the abutment surface 440 can contact the force application member 300 to receive the separating force.

As shown in fig. 55, 58 and 59, the process cartridge further includes a restoring member 600 for applying a force to the urging member 400 to restore it from the retracted position to the operating position, the restoring member 600 having elasticity, and the restoring member 600 being compressed when the urging member 300 urges the urging member 400 to rotate. Preferably, the reset member 600 is a torsion spring, and is mounted on the developing protecting cover 130, specifically, a mounting seat 135 for mounting the torsion spring is provided at a position of the developing protecting cover 130 near the lower end, a ring portion of the torsion spring is sleeved on the mounting seat 135, one arm of the torsion spring is abutted on the developing protecting cover 130, the other arm of the torsion spring is abutted on the main body 410 of the pushing member 400, and the torsion spring is configured to always apply a force to the pushing member 400 towards the A1 direction, so that the pushing member 400 is kept at a working position (i.e. an initial state of the pushing member 400) under the action of no other external force. In this embodiment, the mounting base 135 may be a part of the end of the engaging portion 133 (the clip post), and the mounting base 135 and the engaging portion 133 may be integrally formed to simplify the structure of the developing protecting cover 130.

Further, the urging member 400 further includes a clamping portion 450 connected to the restoring member 600, where the clamping portion 450 is disposed at the other end of the main body 410 opposite to the abutting surface 440 in the length direction, the clamping portion 450 may be a hole or a slot, and is recessed or penetrated inwards from the end surface of the main body 410 facing the B2 direction, and the other arm of the restoring member 600 (torsion spring) extends into the clamping portion 450 and abuts against the inner wall of the clamping portion 450, where the clamping portion 450 is disposed to connect the restoring member 600 to prevent the restoring member 600 from dislocating.

In some other embodiments, the restoring member 600 may be other elastic components such as a compression spring, an extension spring, elastic rubber, elastic sponge, etc., and may be other restoring structures that use an inelastic manner.

As shown in fig. 58 and 59, after the process cartridge is mounted in place in the image forming apparatus, the urging member 400 is at the working position at this time, the urging member 300 of the electronic image forming apparatus starts to move, when the urging member 300 moves in the direction B1, the urging member 300 contacts the sliding avoidance surface 430, the urging member 300 slides along the sliding avoidance surface 430 and applies an urging force to the sliding avoidance surface 430, the urging member 400 swings around the joint 133 in the direction A2, the urging member 400 swings from the working position to the avoidance position, the urging member 300 can continue to move in the direction B1, the reset member 600 is compressively deformed, when the urging member 300 moves to the position separated from the sliding avoidance surface 430, the urging force of the urging member 300 to the sliding avoidance surface 430 disappears, the elastic deformation of the reset member 600 returns, the urging member 400 swings in the direction A1, the abutment surface 440 of the urging member 400 swings from the avoidance position to the working position is opposite to the urging member 300, that is at least partially overlapped with the urging member 300 in the second direction, and the urging member 300 contacts the abutment surface 440 at this time, and the image forming apparatus is not ready for developing.

When the electronic imaging device does not perform development work, the force application member 300 moves towards the direction B2, the force application member 300 contacts with the abutting surface 440 and applies a separation force to the abutting surface 440, the separation force received by the abutting surface 440 acts on the whole developing unit 100 through the force application member 400, the lower end of the developing unit 100 swings towards a direction away from the drum unit 200 (approximately along the direction B2) after being stressed, the developing unit 100 moves from the first position to the second position, the developing roller 140 is driven to separate from the photosensitive drum 240, and meanwhile, the upper end of the developing unit 100 moves towards a direction close to the photosensitive drum 240 (approximately along the direction B1) to compress the elastic member 500.

When the development work is required by the electronic imaging device, the separation force of the urging member 300 to the abutment surface 440 is removed, the deformation of the elastic member 500 is recovered, the developing unit 100 is pushed to move from the second position to the first position, and the developing roller 140 is contacted with the photosensitive drum 240, so that the development work can be performed.

Example thirteen

The embodiment of the application also discloses a processing box which is detachably arranged in the electronic imaging device, the electronic imaging device comprises a driving head, and when the processing box is arranged in the electronic imaging device, the processing box can be matched with the driving head of the electronic imaging device so as to drive a rotating piece in the processing box to rotate through the driving head. Referring to fig. 60, the process cartridge includes a drum unit 20, a developing unit 10, and a driving assembly, the frames of the drum unit 20 and the developing unit 10 constitute a cartridge body, and the drum unit 20 includes a photosensitive drum 22, the developing unit 10 includes a developing roller and a powder feeding roller, the photosensitive drum 22, the developing roller and the powder feeding roller are rotatably provided to the cartridge body, respectively, and the driving assembly is provided at an end of the cartridge body for driving connection with a driving head to receive a driving force output by the driving head and transmit the driving force to rotary members such as the photosensitive drum 22, the developing roller and the powder feeding roller, so that the rotary members are rotated.

Specifically, the driving assembly includes a first power receiving member, which is provided as a first coupling 51, a first transmission member 52, a second transmission member 53, a third transmission member 54, a powder feeding roller gear 56, and a developing roller gear 55, and the first coupling 51 is connected to the photosensitive drum 22. The first transmission member 52 is a first gear, and the first gear is sleeved on the first coupling 51. The second transmission member 53 is a second gear, the powder feeding roller gear 56 is connected to one end of the powder feeding roller, the developing roller gear 55 is connected to one end of the developing roller, and the powder feeding roller gear 56 and the developing roller gear 55 are respectively meshed with the second gear. The third transmission member 54 is configured as an intermediate gear, and the intermediate gear is engaged with the first gear and the second gear, respectively.

When the process cartridge is mounted in the electronic image forming apparatus, the first coupling 51 can be in driving connection with the driving head, so that the first coupling 51 is driven to rotate by the driving head, the first gear and the photosensitive drum 22 are driven to rotate by the first coupling 51, the second gear is driven to rotate by the rotation of the first gear through the intermediate gear, and the powder feeding roller gear 56 and the developing roller gear 55 are driven to rotate by the rotation of the second gear, so that the powder feeding roller and the developing roller are driven to rotate.

Further, the process cartridge further includes a developing protecting cover 130 and a driving side end cover, the developing protecting cover 130 is disposed at the outer side of the end face of the cartridge body and located at the end of the developing roller, the driving side end cover is covered at the outer side of the developing protecting cover 130, a first mounting column and a second mounting column are disposed at the inner side of the driving side end cover, the second gear is sleeved on the first mounting column, and the intermediate gear is sleeved on the second mounting column.

Referring to fig. 61, the developing protecting cover 130 is provided with a groove 130a, the process cartridge further includes a pushing member 400, the pushing member 400 is movably disposed on the developing protecting cover 130 and at least partially protrudes from the groove 130a, and the pushing member 400 can rotate in the groove 130a to have a working position and a retracted position.

Specifically, the process cartridge further includes a reset member 600, the developing protecting cover 130 includes an engaging portion 133, and the urging member 400 has a click portion 420, a sliding escape surface 430, and an abutment surface 440, the click portion 420 being rotatably connected with the engaging portion 133 to enable the urging member 400 to rotate about the engaging portion 133. The reset member 600 is a torsion spring, the ring portion of the torsion spring is sleeved on the mounting seat of the driving side bracket, one arm of the torsion spring is abutted on the driving side bracket, and the other wall of the torsion spring is abutted on the pushing member 400, so that the pushing member 400 can be reset from the avoiding position to the working position through the torsion spring.

When the process cartridge is mounted in place in the image forming apparatus, the urging member 400 is at the working position, the urging member of the electronic image forming apparatus starts to move, and the sliding avoiding surface 430 is pushed in the process of moving the urging member, so that the urging member 400 swings around the joint portion 133, swings from the working position to the avoiding position, and the reset member 600 is compressively deformed in the process of swinging the urging member 400; when the force application member moves to a position separated from the sliding avoidance surface 430, the pushing force of the force application member on the sliding avoidance surface 430 disappears, the elastic deformation of the reset member 600 is recovered, the push member 400 is pushed to swing from the avoidance position to the working position, and the abutment surface 440 of the push member 400 reaching the working position is opposite to the force application member, that is, the two members are at least partially overlapped in the second direction, but the force application member is not in contact with the abutment surface 440, and at this time, the preparation state of the electronic imaging device is completed, and development work can be performed.

When the electronic imaging device does not perform development work, the force application member moves to be in contact with the abutting surface 440 and applies force to the abutting surface 440, the force received by the abutting surface 440 acts on the whole developing unit 10 through the force application member 400, the lower end of the developing unit 10 swings in a direction away from the drum unit 20 after being stressed, the developing unit 10 moves from the first position to the second position to drive the developing roller to be separated from the photosensitive drum 22, and meanwhile, the upper end of the developing roller moves in a direction close to the photosensitive drum 22 to compress an elastic member connected between the drum unit and the developing unit.

When the electronic imaging device needs to perform development work, the acting force of the force application member on the abutting surface 440 is removed, the deformation of the elastic member is recovered, the developing unit 10 is pushed to move from the second position to the first position, and the developing roller is contacted with the photosensitive drum 22, so that development work can be performed.

Other structures of the process cartridge of this embodiment are substantially the same as those of the first or tenth embodiment, and will not be described here.

The foregoing is merely a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A process cartridge, comprising:

a case body;

the photosensitive drum is rotatably arranged on the box body;

the developing roller is rotatably arranged on the box body;

the powder feeding roller is rotatably arranged on the box body;

the driving assembly is arranged at the end part of the box body and comprises a first coupler and a second coupler, and the first coupler and the second coupler are used for receiving driving force output by the electronic imaging equipment and respectively transmitting the driving force to the photosensitive drum, the developing roller and the powder feeding roller;

2. A process cartridge according to claim 1, wherein said cutout portion extends to an upper end and a rear end of said drive side end cap.

3. The process cartridge of claim 1, wherein the drive assembly further comprises a developer roller gear and a powder feed roller gear, the first coupling is connected to the photosensitive drum, the developer roller gear is sleeved at one end of the developer roller, the powder feed roller gear is sleeved at one end of the powder feed roller, the powder feed roller gear is connected to the second coupling, and the developer roller gear is connected to one of the first coupling and the second coupling.

4. A process cartridge according to claim 3, further comprising a developing cover provided on an outer side of said driving assembly, said driving-side end cap being provided on an outer side of said developing cover, a portion of said first coupling being passed through said first through hole so as to be exposed on an outer side of said driving-side end cap, and a portion of said second coupling being passed through said developing cover and said notch portion in order so as to be exposed on an outer side of said driving-side end cap.

5. A process cartridge according to claim 4, wherein said developing protecting cover includes a cylindrical portion provided with a third through hole, and an annular flange surrounding the periphery of said cylindrical portion, and having a space between said annular flange and said cylindrical portion for cooperating with a developing drive head of the electrophotographic apparatus for limiting, said annular flange penetrating said notched portion, and said second coupling penetrating from said third through hole.

6. A process cartridge according to claim 4, wherein said developing protecting cover is provided with a supporting column, said driving-side end cap is provided with a guide portion, and said supporting column is movable within said guide portion;

when the support column is located at one end of the guide portion, the developing roller is located at a first position, the developing roller is in contact with the photosensitive drum, and when the support column is located at the other end of the guide portion, the developing roller is located at a second position, and the developing roller is in separation from the photosensitive drum.

7. A process cartridge according to claim 6, wherein in an axial direction of said developing roller, a projection of said guide portion and a projection of said second coupling are completely misaligned.

8. A process cartridge according to claim 6, wherein said drive side end cap includes a regulating portion, and said developing protecting cover includes a regulated portion capable of being regulated in cooperation with said regulating portion for preventing said developing roller from deviating from said first position.

9. The process cartridge according to claim 7, wherein the notched portion is provided as a second through hole, a portion of the first coupling is exposed to the outside of the driving-side end cap through the first through hole, and a portion of the second coupling is exposed to the outside of the driving-side end cap through the second through hole.

10. A process cartridge according to claim 9, wherein said developing roller gear is connected to said second coupling, and a projection of said developing roller gear falls entirely within a projection of said second through hole in an axial direction of said developing roller.

11. A process cartridge according to any one of claims 1-10, further comprising a urging member operatively connected to said developing roller, said urging member being capable of moving said developing roller from a first position to a second position when said urging member is urged by an urging member of an electronic image forming apparatus.