WO2023237043A1

WO2023237043A1 - Process cartridge

Info

Publication number: WO2023237043A1
Application number: PCT/CN2023/099098
Authority: WO
Inventors: 曾丽坤; 李颖豪; 钟宝生; 罗琴; 梁祺杰; 陈宇; 靳杨; 陈柔娟
Original assignee: 珠海纳思达信息技术有限公司
Priority date: 2022-06-08
Filing date: 2023-06-08
Publication date: 2023-12-14
Also published as: CN220491185U; CN117192925A

Abstract

The present application discloses a process cartridge. The process cartridge comprises a cartridge body, a photosensitive drum, a developer roller, and a driving assembly; the photosensitive drum and the developer roller are rotatably provided on the cartridge body, the developer roller has a first position and a second position with respect to the photosensitive drum, and when the developer roller is located at the second position, the developer roller and the photosensitive drum are in a separated state; and the driving assembly is provided at the end of the cartridge body and comprises a first power receiving component, the first power receiving component is used for receiving a driving force output by a driving head of an electronic imaging device and rotates, and both the photosensitive drum and the developer roller can receive the driving force transmitted by the first power receiving component and rotate. According to the present application, a single-driving mode is used, the structure of the process cartridge is relatively simple, the cost is low, and when the developer roller is located at the second position, a third transmission member is always meshed with a first transmission member and a second transmission member, such that the developer roller and the photosensitive drum can smoothly change from the separated state into a contact state.

Description

Processing box

This application claims priority from the following Chinese patent applications, the entire contents of which are incorporated into this application by reference. The specifically requested priority documents are:

Prior application date Prior application number

(1)2022-06-08, 202221435791.7;

(2)2022-06-15, 202221501591.7;

(3)2022-10-18, 202222743725.2;

(4)2022-12-12, 202223355376.3;

(5)2023-02-21, 202320289429.1;

(6)2023-03-29, 202320679262.X.

Technical field

The present application relates to the field of image forming technology, and specifically to a process box.

Background technique

Electronic imaging devices utilize electrophotographic imaging processes to form images on recording materials such as paper. Examples of electronic imaging equipment include electrophotographic copiers, electrophotographic printers, fax machines, word processors, 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. The photosensitive member and the developing member may also be integrally configured to be detachably installed in an electronic imaging device. Box (can be called a processing box). The frame including the photosensitive member in the process cartridge is the photosensitive frame, and the frame including the developing member is the developing frame.

In the prior art, this type of process cartridge adopts a dual drive structure, that is, a driving head is provided on the photosensitive frame, and a driving head is also provided on the developing frame. The driving head on the photosensitive frame drives the photosensitive member, and the driving head on the developing frame drives the photosensitive member. This dual drive method of driving the developing component has a relatively complex structure and high cost.

Application content

In order to overcome the above-mentioned problems in the prior art, the main purpose of the present application is to provide a process cartridge with a simple structure and low cost.

In order to achieve the above purpose, this application specifically adopts the following technical solutions:

The present application provides a process cartridge, which is detachably installed into an electronic imaging device. The electronic imaging device includes a driving head. The process cartridge includes:

box body;

A photosensitive drum is rotatably arranged on the box body;

A developing roller is rotatably arranged on the box body, and the developing roller has a first position and a second position relative to the photosensitive drum. When the developing roller is in the first position, the developing roller The roller is in contact with the photosensitive drum, and when the developing roller is in the second position, the developing roller and the photosensitive drum are in a separated state;

Driving assembly, the driving assembly is arranged at the end of the box body, the driving assembly includes a first power receiving component, the first power receiving component is used to receive the driving force output by the driving head and receive the driving force after receiving the driving force. The photosensitive drum and the developing roller are capable of receiving the driving force transmitted by the first power receiving member and rotating when receiving the driving force.

Compared with the existing technology, this application adopts a single drive mode. The electronic imaging equipment only needs to be provided with a drive head, and the processing box only needs to be provided with a coupling to receive rotational power. The structures of the electronic imaging equipment and the processing box are relatively simple. ,Reduce costs.

Description of the drawings

Figure 1 is a schematic structural diagram of the process box from an angle according to Embodiment 1 of the present application;

Figure 2 is a schematic structural diagram of the process box from another angle according to Embodiment 1 of the present application;

Figure 3 is a partially exploded schematic view of the process box according to Embodiment 1 of the present application, with the end cover omitted in the figure;

Figure 4 is a structural schematic diagram of the process box of Embodiment 1 of the present application from another angle, with the end cover omitted in the figure;

Figure 5 is a schematic structural diagram of the end cover of the process box according to Embodiment 1 of the present application;

Figure 6 is a schematic structural diagram of a process box according to Embodiment 2 of the present application, with the end cover omitted in the figure;

Figure 7 is a schematic structural diagram of a modification of the process box according to Embodiment 2 of the present application, with the end cover omitted in the figure;

Figure 8 is a schematic structural diagram of a second transmission member of a modification of the process cartridge in Embodiment 2 of the present application;

Figure 9 is a schematic structural diagram of a process box according to Embodiment 3 of the present application, with the end cover omitted in the figure;

Figure 10 is a schematic diagram of the transmission structure of the process cartridge in Embodiment 3 of the present application;

Figure 11 is an exploded view of the transmission structure of the process cartridge according to Embodiment 3 of the present application;

Figure 12 is a schematic diagram of the transmission structure and the second elastic member of the process cartridge in Embodiment 3 of the present application;

Figure 13 is a partial schematic diagram of the developing unit of the process cartridge according to Embodiment 3 of the present application;

Figure 14 is a schematic structural diagram of a process box according to Embodiment 4 of the present application;

Figure 15 is a partial schematic diagram of a process box according to Embodiment 4 of the present application, with the end cover omitted in the figure;

Figure 16 is a schematic structural diagram of the process box from one angle according to Embodiment 5 of the present application;

Figure 17 is a structural schematic diagram of the process box from another angle according to Embodiment 5 of the present application, with the end cover omitted in the figure;

Figure 18 is a partial schematic diagram of the driving end of the process cartridge according to Embodiment 5 of the present application from an angle;

Figure 19 is a partial schematic diagram of the driving end of the process cartridge according to Embodiment 5 of the present application from another angle;

Figure 20 is an exploded structural diagram of the second coupling and the second transmission member of the process cartridge in Embodiment 5 of the present application;

Figure 21 is a schematic structural diagram of a process box according to Embodiment 6 of the present application;

Figure 22 is a partially exploded schematic diagram of the process box according to Embodiment 6 of the present application;

Figure 23 is a schematic structural diagram of the developing bracket of the process cartridge according to Embodiment 6 of the present application;

Figure 24 is a schematic diagram of the overall structure of the process box from one angle according to Embodiment 7 of the present application;

Figure 25 is a schematic diagram of the overall structure of the process box from another angle according to Embodiment 7 of the present application;

Figure 26 is a partially exploded structural diagram of the process box of Embodiment 7 of the present application;

Figure 27 is a schematic structural diagram of the developing protective cover of the process cartridge according to Embodiment 7 of the present application;

Figure 28 is a schematic structural diagram of the drive side end cover of the process cartridge according to Embodiment 7 of the present application;

Figure 29 is a schematic diagram of the overall structure of the process box from one angle according to Embodiment 8 of the present application;

Figure 30 is a schematic diagram of the overall structure of the process box from another angle according to Embodiment 8 of the present application;

Figure 31 is a schematic diagram of the process cartridge according to Embodiment 8 of the present application viewed along the axial direction of the developing roller, with the developing protective cover omitted in the figure;

Figure 32 is a schematic structural diagram of the drive side end cover of the process cartridge according to Embodiment 8 of the present application;

Figure 33 is a schematic diagram of the overall structure of the process box from one angle according to Embodiment 9 of the present application;

Figure 34 is a schematic structural diagram of the drive side of the process cartridge in Embodiment 9 of the present application;

Figure 35 is a schematic structural diagram of the drive side of the process cartridge in Embodiment 9 of the present application, with the end cover and developing protective cover removed;

Figure 36 is a schematic structural diagram of a process cartridge installation slider according to Embodiment 9 of the present application;

Figure 37 is a schematic structural diagram of the developing protective cover of the process cartridge according to Embodiment 9 of the present application;

Figure 38 is a schematic structural diagram of the force receiving member of the process cartridge in Embodiment 9 of the present application;

Figure 39 is a schematic diagram of the overall structure of the process box according to Embodiment 10 of the present application;

Figure 40 is a partial structural schematic diagram of a process box according to Embodiment 10 of the present application;

Figure 41 is a partially exploded structural diagram of a process box according to Embodiment 10 of the present application;

Figure 42 is a schematic structural diagram of the separator in Embodiment 10 of the present application;

Figure 43 is a schematic structural diagram of a developing protective cover according to Embodiment 10 of the present application;

Figure 44 is a partial structural schematic diagram of the process box viewed along the first direction according to Embodiment 10 of the present application;

Figure 45 is a partial structural schematic diagram of the process box viewed along the third direction according to Embodiment 10 of the present application;

Figure 46 is a partial structural schematic diagram of the separation member of the process cartridge in the avoidance position according to Embodiment 10 of the present application;

Figure 47 is a partial structural schematic diagram of the separation member of the process cartridge in the working position according to Embodiment 10 of the present application;

Figure 48 is a partial structural schematic diagram of the separation member of the process cartridge in the working position according to Embodiment 11 of the present application;

Figure 49 is a partial structural schematic diagram of the process cartridge in the eleventh embodiment of the present application, with the separator in the avoidance position;

Figure 50 is a schematic structural diagram of the separator in Embodiment 11 of the present application;

Figure 51 is a partial structural schematic diagram of the process box viewed along the first direction according to Embodiment 11 of the present application;

Figure 52 is a partial structural schematic diagram of the process box viewed along the third direction according to Embodiment 11 of the present application;

Figure 53 is a schematic diagram of the overall structure of the process box according to Embodiment 12 of the present application;

Figure 54 is a partial structural diagram of a process box according to Embodiment 12 of the present application;

Figure 55 is a partially exploded structural diagram of the process box according to Embodiment 12 of the present application;

Figure 56(a) and (b) are schematic structural diagrams of the separator in Embodiment 12 of the present application;

Figure 57 is a schematic structural diagram of a developing protective cover according to Embodiment 12 of the present application;

Figure 58 is a partial structural schematic diagram of the process cartridge in Embodiment 12 of the present application, with the separator in an avoidance position;

Figure 59 is a partial structural schematic diagram of the separation member of the process cartridge in the working position according to Embodiment 12 of the present application;

Figure 60 is a partial structural diagram of a process box according to Embodiment 13 of the present application;

Figure 61 is a schematic structural diagram of the developing protective cover, pushing member and reset member in the process box according to Embodiment 13 of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

In the description of this application, unless otherwise expressly stipulated and limited, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; unless otherwise specified or stated , the term "multiple" refers to two or more, the term "multiple" refers to two or more; the term "connected", "fixed" etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediary. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present application are described from the perspective shown in the drawings and should not be understood as a reference to the embodiments of the present application. limited. Additionally, it should be understood in this context that when an element is referred to as being connected "on" or "under" another element, it can not only be directly connected "on" or "under" the other element, but also can be directly connected "on" or "under" the other element. Indirectly connected "on" or "below" another element through an intermediate element.

Electronic imaging devices form images on recording materials using, for example, electrophotographic imaging processes. Electronic imaging equipment includes, for example, electrophotographic copiers, electrophotographic printers (LED printers, laser printers, etc.), electrophotographic printer-type fax machines, and the like. The process cartridge is detachably installed in the electronic imaging 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 imaging device includes a driving head, which is used to transmit the driving force of the electronic imaging device to the process cartridge to make the process cartridge work.

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

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

The directions B1 and B2 are the second direction, the direction pointed by B1 is the positive direction of the second direction, and the direction pointed by B2 is the negative direction of the second direction;

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

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

Embodiment 1

As shown in FIGS. 1 and 2 , this embodiment provides a process cartridge, which includes a developing unit 10 , a drum unit 20 , a pushing member 30 and a driving assembly, wherein the frames of the developing unit 10 and the drum unit 20 form a cartridge. body.

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

The developing frame 11 surrounds a toner bin for storing developer (for example, toner). The developing frame 11 is generally in the shape of a long box. The developing frame 11 has end faces at both ends in the length direction. The developing frame 11 may be provided with a powder adding port through which toner is replenished into the toner bin. The powder adding port may be provided on one end face of the developing frame 11 . The powder feeding roller and the developing roller are rotatably supported at both ends of the developing frame 11 in the length direction, 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 powder feeding roller delivers the toner to the developing roller, where it is adsorbed by the charged developing roller.

As shown in FIG. 2 , the photosensitive frame 21 surrounds a waste toner bin for collecting waste toner. The photosensitive frame 21 also has a length direction, and its length direction is consistent with the length direction of the developing frame 11 . The photosensitive drum 22 is rotatably supported on the photosensitive frame 21 At both ends in the length direction, specifically, the photosensitive drums 22 are provided on the lower end side of the photosensitive frame 21 in the height direction. The waste toner bin is arranged along the length direction of the photosensitive frame 21 , and is located on one side of the photosensitive drum 22 . The toner adsorbed by the developing roller transfers the toner to the photosensitive drum 22 through the potential difference between the developing roller and the photosensitive drum 22. The toner on the photosensitive drum then passes through After transfer by the transfer belt of the electronic imaging device, an image is formed on the recording material (such as paper). After transfer, the cleaning blade makes linear contact with the photosensitive drum 22 to clean the toner that has not been completely transferred on the surface of the photosensitive drum 22 , that is, waste toner. The cleaned waste toner is stored in the waste toner bin. The charging roller is used to charge the surface of the photosensitive drum 22 with uniform charge, so that the photosensitive drum 22 can absorb toner.

When the electronic imaging device is working, the developing roller and the photosensitive drum 22 need to be in tight contact. When the electronic imaging device is not working, the developing roller and the photosensitive drum 22 need to be separated by a certain distance to avoid prolonged contact between the developing roller and the photosensitive drum 22. This may lead to problems such as the photosensitive drum 22 being contaminated by excess developer attached to the developing roller, the developing roller being deformed, or the photosensitive drum 22 being worn.

Based on this, the drum unit 20 and the developing unit 10 in this embodiment are configured to move relative to each other, so that the developing roller and the photosensitive drum 22 can be in contact when the electronic imaging device is working and separated when not working. When the process cartridge is installed in the electronic imaging apparatus, the drum unit 20 abuts against components in the electronic imaging apparatus, the drum unit 20 is immovable, and the developing unit 10 is configured to be able to move between a first position and a second position relative to the drum unit 20 . When the developing unit 10 is in the first position, the developing roller is in contact with the photosensitive drum 22; when the developing unit 10 is in the second position, the developing roller is separated from the photosensitive drum 22.

In this embodiment, the movement mode of the developing unit 10 is to swing with its middle position in the height direction as the axis. 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 with the photosensitive drum 22. At this time, the upper end of the developing unit 10 is located away 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 is moved away from the drum unit 20. The direction swing drives the developing roller to separate from the photosensitive drum 22 . At this time, the upper end of the developing unit 10 swings toward the direction closer to 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 realized by the cooperation of the urging member 30 and the force applying member in the electronic imaging device. Specifically, the developing unit 10 is provided with a pushing member 30 on one or both end faces in the length direction. The pushing member 30 is rotatably disposed on the end face of the developing unit 10. The pushing member 30 is in the shape of a bar-shaped arm, and one end of the pushing member 30 is in the shape of a bar-shaped arm. The developing unit 10 is hinged, and the other end 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 force of the force-applying member, so that the developing roller is separated from the photosensitive drum 22 .

As shown in Figure 3, in this embodiment, the developing unit 10 also includes a driving end bracket 12. The driving end bracket 12 is disposed on one end surface of the developing frame 11. The pushing member 30 can be hinged on the driving end bracket 12. The bracket 12 is fixed on the end surface of the developing frame 11 through screws. In some other embodiments, the pushing member 30 does not need to be disposed on the drive end bracket 12 , a support shaft is provided on the end face of the developing unit 10 , and one end of the pushing member 30 is sleeved on the support shaft, so that the pushing member 30 can also be completed. Installation of push piece 30. A part of the free end of the pushing member 30 is exposed outside the developing frame 11 from below, so that the force-applying member can contact it from below and exert force on it.

As shown in FIG. 1 , a first elastic member 40 is disposed between the drum unit 20 and the developing unit 10 to move the developing unit 10 from the second position to the first position and drive the developing roller to contact 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 also be an elastic rubber, an elastic sponge, an elastic piece, or other components that can provide elastic force.

When the electronic imaging device is not working, the force-applying member contacts the pushing member 30 from below and exerts force on it, so that the free end of the pushing member 30 synchronously drives the developing unit 10 to move from the first position to the second position during rotation. position, the photosensitive drum 22 is separated from the developing roller. At this time, the upper end of the developing unit 10 moves closer to the photosensitive drum 22 and compresses the first Elastic member 40.

When the electronic imaging device needs to work, the force exerted by the force-applying member on the pushing member 30 is removed, and the elastic deformation of the first elastic member 40 is restored, pushing the developing unit 10 to move from the second position to the first position, and the developing roller and the photosensitive drum 22 touch. At the same time, the pushing member 30 also returns to its original position along with the movement of the developing unit 100 .

The driving assembly is disposed outside the end surface of the process cartridge in the length direction, specifically, it can be disposed outside one end surface of the developing frame 11 and the photosensitive frame 21 in the length direction. The driving component is used to receive and transmit the driving force of electronic imaging equipment (such as laser printers) to make the process cartridge work.

As shown in FIGS. 1 and 2 , the process cartridge further includes end caps 60 . The end caps 60 cover the outside of the end surfaces of the box body at both ends in the length direction and are used to protect the driving components provided on the end surfaces of the process cartridge.

In this embodiment, the end cover 60 located at the driving end of the cartridge is provided with a through hole for exposing the first power receiving component (such as the first coupling described below) connected to the photosensitive drum to the end cover 60 outside, so that the first power receiving component connected to the photosensitive drum can mesh with the driving head of the electronic imaging device, and the developing protective cover and other parts of the driving assembly, such as the developing roller gear, powder feeding roller gear, etc., are all covered by the end cover 60 The end cover 60 prevents the developing protective cover or the developing roller gear from being damaged.

As shown in Figures 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. The first The coupling 51 is the first power receiving component.

Specifically, the first coupling 51 is fixedly provided at one end of the length direction of the photosensitive drum 22 , or may be integrally formed with the photosensitive drum 22 . The first coupling 51 is used to engage with the driving head of the electronic imaging device, thereby receiving electrons. The rotational driving force of the imaging device drives the photosensitive drum 22 fixedly connected thereto to rotate. The first coupling 51 is provided with a triangular prism-shaped meshing head at one end away from the end surface of the drum unit 20. The shape of the meshing head can also be other shapes, as long as it can mesh with the driving head to stably receive driving force.

The first transmission member 52 is configured as a first gear. The first gear is coaxially sleeved on the outside of the first coupling 51 . The gear portion of the first gear is a helical tooth. The first transmission member 52 is connected to the first coupling 51 , for example, protruding ribs can be provided on the inner wall of the first transmission member 52 along its axial direction, and grooves matching the protruding ribs can be provided on the outer wall of the first coupling 51 along its axial direction, so that the first coupling 51 It is engaged with the first transmission member 52 through convex ribs and grooves, so that when the first coupling 51 receives the driving force and rotates, the first transmission member 52 also rotates synchronously. Optionally, the first transmission member 52 and the first coupling 51 can also be connected by welding, pasting, etc.

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

The powder feeding roller gear 56 is arranged at one end in the length direction of the powder feeding roller. The powder feeding roller gear 56 and the powder feeding roller can be fixedly connected or detachably connected, as long as the powder feeding roller gear 56 can be rotated to drive the powder feeding roller. Just rotate in sync.

Continuing to refer to FIGS. 3 to 5 , the second transmission member 53 is located outside the end surface of the developing unit 10 . The second transmission member 53 meshes with the developing roller gear 55 and the powder feeding roller gear 56 . The second transmission member 53 is set to the third Two gears. The second gear includes a first gear part 531 and a second gear part 532. The first gear part 531 and the second gear part 532 are arranged along the axial direction of the second transmission member 53. The first gear part 531 is in the axial direction. on the developing unit relative to the second gear portion 532 The end surface of the element 10 is further away, the diameter of the first gear part 531 is larger than the diameter of the second gear part 532, and both the first gear part 531 and the second gear part 532 are helical teeth.

As shown in Figure 5, a first mounting post 61 is provided on the inside of the end cover 60, and the second transmission member 53 is sleeved and installed on the first mounting post 61. When the second transmission member 53 and the end cover 60 are assembled to the developing unit 10, the first gear part 531 of the second transmission member 53 meshes with the developing roller gear 55, and the second gear part 532 meshes with the powder feeding roller gear 56. The rotation of the second transmission member 53 can simultaneously drive the developing roller. The gear 55 and the powder feed roller gear 56 rotate.

As shown in Figures 3 to 5, the third transmission member 54 is an intermediate gear meshed with the first transmission member 52 and the second transmission member 53. Specifically, a second mounting post 62 is provided on the inside of the end cover 60. The third transmission member 54 is sleeve-mounted on the second mounting post 62. When the third transmission member 54 and the end cover 60 are assembled to the outside of the end surface of the developing unit 10, the gear portions of the third transmission member 54 and the first transmission member 52 The third transmission member 54 is also meshed with the first gear portion 531 of the second transmission member 53 . The gear portion of the third transmission member 54 is also a helical gear.

When the process cartridge is working, the first coupling 51 engages with the driving head of the electronic imaging device, receives the rotational driving force to rotate, drives the photosensitive drum 22 and the first transmission member 52 to rotate coaxially, and the first transmission member 52 drives the first transmission member 52 to be connected with it. The third transmission member 54 rotates, and the third transmission member 54 drives the second transmission member 53 connected with it to rotate. The second transmission member 53 drives the developing roller gear 55 and the powder feeding roller gear 56 connected with it to rotate. The rotational driving force received by the first coupling 51 from the electronic imaging device is transmitted through the above-mentioned process, so that the photosensitive drum 22, the developing roller, and the powder feeding roller are all driven to rotate, and the process cartridge can operate normally.

In the process box provided by this embodiment, the developing unit 10 can move relative to the drum unit 20 and adopts a single drive implementation. The drive assembly of this embodiment replaces the dual drive approach of the prior art. The electronic imaging device only needs to set There is only one drive head and one coupling for receiving rotational power on the process box. The structures of the electronic imaging equipment and the process box are relatively simple and the cost is reduced. In addition, in this embodiment, when the developing unit 10 is in the first position and the second position, the third transmission member 54 is always engaged with the first transmission member 52 and the second transmission member 53, which can make the developing roller and the photosensitive drum 22 separate from each other. The change into the contact state is smoother, avoiding the direct meshing of the first transmission member 52 and the second transmission member 53 to cause collision, and extending the service life of the first transmission member 52 and the second transmission member 53 .

Embodiment 2

The structure of this embodiment is basically the same as that of Embodiment 1, except that the structure of the driving component is different.

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

As shown in FIG. 6 , the transmission belt may be a crawler belt, and transmission teeth 541 are provided on the inside of the crawler belt. The first transmission member 52 may be configured as a sprocket that can cooperate with the transmission teeth 541 .

The second transmission member 53 is also provided with a third gear part. The third gear part is provided on the side of the first gear part 531 away from the end surface of the developing unit 10 . The third gear part can mesh with the transmission teeth 541 of the crawler belt.

During assembly, the crawler track is placed on the outside of the gear portion of the first transmission member 52 and the third gear portion of the second transmission member 53 and meshes with them.

When the first coupling 51 receives the rotational driving force and rotates, the first transmission member 52 follows the rotation and serves as the driving wheel to drive the second transmission member 53 to rotate through the crawler belt. The second transmission member 53 drives the developing roller gear that is transmission connected with it. 55 and the powder feeding roller gear 56 rotate.

As a modification of the second embodiment, as shown in Figures 7 and 8, the transmission belt can be a belt. When the transmission belt is a belt, the first transmission member 52 is correspondingly configured as a round wheel, and the second transmission member 53 is also correspondingly added with a round wheel. The round wheel part 533 is provided on the side of the first gear part 531 away 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 rotational driving force and rotates, the first transmission member 52 rotates accordingly, and the belt and the first transmission member 52 The friction with the round wheel portion 533 transmits the driving force, thereby driving the second transmission member 53 to rotate. The second transmission member 53 drives the developing roller gear 55 and the powder feeding roller gear 56 that are connected with it to rotate.

In this embodiment, the effect of single drive can also be achieved through belt transmission.

Other structures of the process box in this embodiment are the same as those in Embodiment 1, and will not be described again here.

Embodiment 3

The structure of this embodiment is basically the same as that of Embodiment 1 and Embodiment 2, except that the structure of the driving component is different.

In this embodiment, as shown in FIG. 9 , the third transmission member 54 is the developing roller gear 55 , and the developing roller gear 55 is installed inside the end cover 60 . Specifically, a third mounting post is provided inside the end cover 60 , and the developing roller gear 55 is installed inside the end cover 60 . 55 sets are installed on the third mounting column. The developing roller gear 55 is connected to the developing roller 15 through a transmission structure.

As shown in FIGS. 10 and 11 , the transmission structure includes a connecting member 57 and a transmitting member 58 . The connecting member 57 is fixedly arranged at one end of the developing roller 15 . The two ends of the transmitting member 58 are respectively connected to the connecting member 57 and the developing roller gear 55 .

Specifically, as shown in Figures 10 to 13, one end of the connecting member 57 is fixedly connected to one end of the developing roller 15, and the other end (the end far away from the end surface of the developing unit 10) is provided with a boss 571 in the middle, and the outer wall of the boss 571 There is a third contact portion 572 on the boss 571. The third contact portion 572 is two third protrusions formed on the outer wall of the boss 571. The two third protrusions are located on the same straight line. The extending direction extends along the direction intersecting the axial direction of the developing roller 15 , that is, the two third protrusions extend along the radial direction of the boss 571 . The two third protruding pillars may be cylindrical structures or other geometric shapes. The third contact portion 572 can be integrally formed on the boss 571 , or can be a separate structure and connected by welding, pasting, snapping, etc.

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

As shown in FIGS. 10 and 11 , the second contact portion 581 is used to contact the third contact portion 572 when transmitting power. The second contact portion 581 is two second contact portions formed at one end of the truncated cone portion 582 . The two second protruding pillars extend along the axial direction of the developing roller 15 . The two second protruding pillars can also be integrally formed at one end of the truncated cone portion 582 . The two second protruding pillars are close to the outermost portion of the truncated cone portion 582 . Surface arrangement, the outermost surfaces of the two second protrusions may be arranged flush with the outermost surface of the truncated cone portion 582 . The two second protrusions are arranged opposite each other in the radial direction of the truncated cone portion 582, and there is an interval between the two second protrusions. The size of the interval is adapted to the size of the protrusion 571; the extension direction of the third contact portion 572 It is intersecting with the extension direction of the second contact portion 581. When the connecting member 57 and the transmission member 58 are engaged, the boss 571 snaps into the space between the two protrusions of the second contact portion 581, and the second The second protruding post of the contact portion 581 is in contact with the third protruding post of the third contact portion 572 so that when the transmission member 58 rotates, it can drive the connecting member 57 to rotate.

As shown in Figure 11, the other end of the truncated cone portion 582 is a first connecting portion 583, and the first connecting portion 583 is a cylinder. shaped member, the outer diameter of the first connecting portion 583 is smaller than the outer diameter of the truncated cone portion 582 .

As shown in Figure 11, the first contact portion 585 is two first protrusions formed on the outer wall of the spherical portion 584. The two first protrusions are located on the same straight line, and the extension direction of the two first protrusions is along the It extends in a direction intersecting the axial direction of the developing roller 15 , that is, the two first protrusions extend in the radial direction of the spherical portion 584 . There is a certain angle between the straight line where the two first protrusions of the first contact portion 585 are located and the line connecting the two second protrusions of the second contact portion 581. Preferably, the included angle is 90 °, that is, the straight line where the two first protrusions of the first contact portion 585 are located intersects with the line connecting the two second protrusions of the second contact portion 581.

The developing roller gear 55 has a hollow channel inside, and its outer circumferential surface is provided with helical teeth. The helical teeth mesh with the first transmission member 52 and the second transmission member 53, 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 FIGS. 11 to 13 , a limiting groove 551 is provided on the inner wall of the developing roller gear 55 . The limiting groove 551 is used to cooperate with the first contact portion 585 . Specifically, the transmission member 58 and the developing roller When the gear 55 is assembled, a part of the spherical portion 584 is inserted into the hollow channel of the developing roller gear 55, and the two first protrusions of the first contact portion 585 are engaged in the limiting grooves 551 of the developing roller gear 55, so that the development roller gear 55 can be developed. When the roller gear 55 rotates, it can drive the transmission member 58 to rotate, and the transmission member 58 then drives the connecting member 57 to rotate, thereby transmitting the driving force to the developing roller 15 .

Further, as shown in FIGS. 9 , 12 and 13 , the process cartridge also includes a second elastic member 50 for making the axis of the transfer member 58 relative to the development roller 15 and the photosensitive drum 22 in a separated state. The axis of 15 is tilted. Specifically, the second elastic member 50 is a torsion spring. The first column 13 is provided on the end surface of the developing frame 11 . The coil portion of the torsion spring is sleeved on the first column 13 . One end of the torsion spring is in contact with the developing frame 11 . The other end of the second column 14 provided on the end surface is in contact with the first connecting portion 583 of the transmission member 58 . The torsion spring is configured to always exert a force on the transmission member 58 , and the direction of the force is along the direction of the developing unit 10 The first position is toward the second position, that is, in 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 and the developing roller 15 move together in a direction away from the photosensitive drum 22 , and the third contact portion of the connecting member 57 572 disengages from the second contact portion 581 of the transmission member 58, and the force between the two disappears. The transmission member 58 tilts away from the photosensitive drum 22 under the force of the second elastic member 50. The axis forms a certain angle with the axis of the connecting member 57 and remains tilted until the developing roller 15 and the photosensitive drum 22 come into contact again.

The transmission member 58 is in an inclined state, which can prevent the third contact portion 572 from interfering with the second contact portion 581 when the developing roller 15 and the photosensitive drum 22 are in contact, and the two can mesh smoothly. , the connecting member 57 will exert a force on the transmitting member 58 in the direction close to the photosensitive drum 22, pushing the transmitting member 58 to be aligned, that is, the axis of the transmitting member 58 and the axis of the connecting member 57 coincide, so that the driving force can be transmitted. Through such a structure, the meshing time of the transmission member 58 and the connecting member 57 during the contact process between the developing roller 15 and the photosensitive drum 22 can be shortened, the meshing can be smoother, and impact damage during meshing can be avoided.

Embodiment 4

The structure of the process box of this embodiment is basically the same as that of the first embodiment, except that the structure of the driving component is different.

In this embodiment, as shown in Figures 14 and 15, a second coupling 59 is added to the drive assembly, and the second transmission The structure of component 53 is also different from that of Embodiment 1. Other components in the driving assembly are the same as Embodiment 1. Only the differences will be described here.

As shown in FIG. 15 , the second coupling 59 is rotatably disposed on the end surface of the developing unit 10 . The second coupling 59 is used to engage with the driving head of the electronic imaging device, thereby receiving the rotational driving force of the electronic imaging device. Rotate. The end of the second coupling 59 away from the end surface of the developing unit 10 is provided with a triangular prism-shaped engaging head. The shape of the engaging head can also be other shapes, as long as it can engage with the driving head of the electronic imaging device to stably receive driving force.

The second transmission member 53 is a gear coaxially arranged with the second coupling 59. The second transmission member 53 and the second coupling 59 can be an integrally formed structure or a separate structure. The connection can be made by welding or other methods, as long as the second transmission member 53 can rotate synchronously when the second coupling 59 rotates.

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

In this embodiment, as shown in FIG. 15 , the third transmission member 54 is an intermediate gear meshing with the first transmission member 52 and the developing roller gear 55 . The structure and installation method of the third transmission member 54 are the same as those in the first embodiment.

When the process cartridge is working, the first coupling 51 engages with the driving head of the electronic imaging device, receives the rotational driving force to rotate, drives the photosensitive drum 22 and the first transmission member 52 to rotate coaxially, and the first transmission member 52 drives the first transmission member 52 to be connected with it. The third transmission member 54 rotates, and the third transmission member 54 drives the developing roller gear 55 connected with it to rotate; at the same time, the second coupling 59 engages with another driving head of the electronic imaging device, receives the rotational driving force to rotate, and drives the The second transmission member 53 rotates coaxially, and drives the powder feeding roller gear 56 connected with the second transmission member 53 to rotate.

The driving assembly in this embodiment adopts a dual drive 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. This structure , since the first coupling 51 drives the photosensitive drum 22 and the developing roller to rotate but does not drive the powder feeding roller to rotate, the torque at the first coupling 51 can be reduced.

Embodiment 5

Compared with the first to fourth embodiments, the difference between this embodiment and the present embodiment is that when the electronic imaging device is not working, the developing roller and the photosensitive drum 22 do not need to be separated.

As shown in Figures 16 to 18, one end of the process cartridge in the length direction is the driving end, and the other end opposite to it is the non-driving end. The driving assembly is arranged on the driving end of the process cartridge, and the developing unit 10 is provided with a The driving end bracket 12 and the developing unit 10 are provided with a non-driving end bracket 16 on the outside of the non-driving end. Both the driving end bracket 12 and the non-driving end bracket 16 are provided with end caps 60 on the outside.

The driving assembly of this embodiment adopts a dual drive structure as in Embodiment 4. The difference from Embodiment 4 is that the first coupling 51 is only used to drive the photosensitive drum 22, and the first transmission member 52 and the third transmission are omitted. The component 54, the second coupling 59 and the second transmission component 53 drive the developing roller and the powder feeding roller.

As shown in Figure 20, the second coupling 59 and the second transmission member 53 of this 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, The second coupling 59 cannot be disengaged from the second transmission member 53 and cannot move relative to each other in the circumferential direction, that is, the second coupling 59 and the second transmission member 53 are relatively stationary (synchronous rotation) during rotation.

In this embodiment, the second coupling 59 is configured to move along the axial direction of the box body, specifically, in the inner cavity of the second transmission member 53 along its axis toward or away from the end surface of the developing unit 10 .

As shown in Figure 20, in this 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 is in contact with the inner wall of the second transmission member 53, and the other end is in contact with the inner wall of the second transmission member 53. On the second coupling 59 , the third elastic member 70 is constructed into a compressed state, so that the second coupling 59 is maintained at a position away from the end surface of the developing unit 10 without external force.

As shown in Figures 19 and 20, in this embodiment, the second coupling 59 is also 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 on the second coupling 59. The guide portion 591 is provided with a guide surface 5911 on the periphery of the meshing head of the second coupling 59 and does not protrude beyond the meshing head in the axial direction. The guide surface 5911 is preferably a sloped surface or an arcuate surface. The number of the guide portions 591 can be multiple, and they are distributed along the circumferential direction of the second coupling 59. When the second coupling 59 receives the driving force and rotates, the guide portions 591 also move along the circumferential trajectory.

As shown in FIGS. 16 to 19 , in this embodiment, the structure of the pushing member 30 is different from that in Embodiment 1. The pushing member 30 is located at the driving end of the developing unit 10 , and is connected to the driving end of the developing unit 10 through the fourth elastic member 80 . On the driving end bracket 12, the pushing member 30 includes a pressure block 31 and an arm 32. The arm 32 is generally L-shaped. One end of the arm 32 is connected to the pressure block 31, and the other end extends to the vicinity of the second coupling 59. One end of the four elastic members 80 is connected to the driving end bracket 12 , and the other end is connected to the arm 32 or the pressing block 31 of the pushing member 30 . When no external force is applied, the other end of the arm 32 is located outside the movement trajectory of the guide portion 591 , that is, when the second coupling 59 rotates, the urging member 30 will not interfere with the guide portion 591 . The end cover 60 of the driving end and the driving end bracket 12 are both provided with escape grooves for the arm portion 32 so that the other end of the arm portion 32 can extend to a position close to the guide portion 591 .

When the electronic imaging device is not working, the force-applying member contacts the urging member 30 and exerts force on it, forcing the urging member 30 to move downward, and the other end of the arm 32 of the urging member 30 moves to the movement trajectory of the guide portion 591 In the process of moving, the pushing member 30 compresses the fourth elastic member 80; as the second coupling 59 rotates, the other end of the arm 32 contacts the guide surface 5911 and slides relatively along the guide surface 5911. The guide portion 591 forms a thrust force, thereby pushing the entire second coupling 59 to move in a direction close to the end surface of the developing unit 10 . The second coupling 59 is disengaged from the driving head of the electronic imaging device, and the second coupling 59 cannot accept the The developing roller also stops rotating due to the driving force, so that when the electronic imaging device is not working, the developing roller will not continue to rub the photosensitive drum 22 , thereby avoiding wear even if the developing roller and the photosensitive drum 22 are not separated. When the second coupling 59 moves toward the end surface of the developing unit 10 , the second coupling 59 compresses the third elastic member 70 when moving. When the electronic imaging device starts to operate, the force-applying member presses the pushing member 30 When the force is removed, the elastic deformation of the fourth elastic member 80 recovers, driving the pushing member 30 to move and reset. The movement trajectory of the other end of the arm 32 of the pushing member 30 away from the guide part 591 no longer resists the guide part 591. The elastic deformation of the three elastic members 70 recovers, driving the second coupling 59 to move in a direction away from the end surface of the developing unit 10. The second coupling 59 re-engages with the driving head of the electronic imaging device and receives the driving force, and the process cartridge starts Work.

Further, as shown in Figures 16 to 18, the process box also includes a first conductive member 91 and a second conductive member 92. The first conductive member 91 and the second conductive member 92 are both elongated conductive steel sheets. The length of the first conductive member 91 and the second conductive member 92 is approximately the same as the length of the process cartridge, and can extend from the non-driving end of the process cartridge to the driving end.

As shown in Figure 17, the first conductive member 91 and the second conductive member 92 are both installed on the non-driving end bracket 16. The first conductive member 91 and the second conductive member 92 are mounted on the non-driving end bracket 16 at the first end in the length direction, and the first end of the first conductive member 91 is also in contact with the steel shaft of the developing roller. The first end of the second conductive member 92 is also in contact with the powder outlet knife, the first end of the first conductive member 91 and the first end of the second conductive member 92 are not in contact, and the first end of the second conductive member 92 is in contact with the electronic imaging device The conductive terminals are in contact with electricity. The first ends of the first conductive member 91 and the second conductive member 92 are shaped after one or more bends to fit the surface of the non-driving end bracket 16 and extend to corresponding positions to connect with the developing roller and the The powder knife contacts. The first conductive member 91 and the second conductive member 92 extend to the vicinity of the urging member 30 at the second end in the length direction.

The first conductive member 91 and the second conductive member 92 have an on state and an off state. When the second end of the first conductive member 91 contacts the second end of the second conductive member 92, they are in the on state and can be developed. The voltage is supplied to the rollers and the punching knife.

In the switched-on state, the developing roller is charged and can absorb the developer and transfer the developer to the photosensitive drum 22 through the potential difference; after the powder discharge knife is conductive, the developer can be charged with more charges, and the developing roller can absorb the developer better. At the same time, when the knife edge is in contact with the developing roller, the thickness of the developer layer is adjusted to be more uniform.

When the second end of the first conductive member 91 is separated from the second end of the second conductive member 92, it is in a disconnected state. At this time, the developing roller is no longer charged, and the developing roller cannot absorb the developer and cannot transfer it to the photosensitive drum 22 through the potential difference. superior.

In this embodiment, the switching between the on state and the off state of the first conductive member 91 and the second conductive member 92 is controlled by the movement of the pushing member 30 . Specifically, the pressing block 31 of the pushing member 30 can be in contact with the second end of the second conductive member 92 or the second end of the first conductive member 91. When no external force is applied, the pushing member 30 The pressing block 31 has no force on the first conductive member 91 or the second conductive member 92 and cannot separate them. The first conductive member 91 and the second conductive member 92 are in a connected state. When the pushing member 30 receives the force of the urging member and moves, the pressing block 31 pushes the second end of the second conductive member 92 to move, causing it to separate from the second end of the first conductive member 91 , causing the first conductive member to move. 91 and the second conductive member 92 change from the connected state to the disconnected state.

When the electronic imaging device is not working, the force applying member exerts force on the pushing member 30 to move the pushing member 30. The pressing block 31 of the pushing member 30 pushes the second conductive member 92 and separates from the first conductive member 91. The circuit Disconnect, the developing roller is powered off; at the same time, the arm 32 of the pushing member 30 moves into the movement trajectory of the guide part 591, interferes with the guide part 591, and pushes the second coupling 59 toward the end surface of the developing unit 10 Move, the second coupling 59 is separated from the driving head of the electronic imaging device and does not receive driving force. At this time, the developing roller is neither charged nor rotated, so that the developer on the developing roller cannot be transferred to 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 is working, the force of the force applying member is removed, the pushing member 30 is reset under the force of the fourth elastic member 80 , the pressing block 31 no longer pushes the second conductive member 92 , and the second conductive member 92 The second end is in contact with the second end of the first conductive member 91, the circuit is in contact, and the developing roller is charged; at the same time, the arm 32 of the pushing member 30 also leaves the movement trajectory of the guide portion 591 and no longer interferes with the guide portion 591. Under the force of the third elastic member 70, the second coupling 59 moves in a direction away from the end surface of the developing unit 10, re-engages with the driving head of the electronic imaging device, and receives the driving force to operate.

Embodiment 6

The driving assembly of this embodiment is the same as the driving assembly of Embodiment 4, both have a dual driving structure, and the first coupling 51 only drives the photosensitive drum 22 , and the second coupling 59 drives the powder feeding roller and the developing roller 15 .

As shown in Figures 21 to 23, in this embodiment, the driving end bracket 12 is provided with a first through hole 122, and the end cover 60 of the driving end is provided with a second through hole 64 coaxial with the first through hole 122. A part of the second coupling 59 passes through the It extends to the outside of the end cover 60 through the first through hole 122 and the second through hole 64 . The second coupling 59 is located at approximately the middle position of the developing unit 10 in the height direction. Correspondingly, the first through hole 122 is also located at approximately the middle position of the drive end bracket 12 . The inner diameter of the first through hole 122 is smaller than the second through hole. 64 inner diameter.

As shown in FIG. 21 , in this embodiment, the process cartridge includes a second connecting portion for enabling the developing unit 10 to move between the first position and the second position relative to the drum unit 20; in the first position, the developing unit 10 moves between the first position and the second position. The 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. Viewed along the axial direction of the developing roller 15 , the second connecting portion does not overlap with the second coupling 59 .

As shown in Figures 21 and 22, in this embodiment, the second connection part includes a support column 121d and a guide part 63. The support column 121d is provided near one end of the drive end bracket 12 in the height direction. Specifically, the support column 121d is provided on the drive end bracket 12. The end surface of 12 is close to its lower end. The end cap 60 is provided with a guide portion 63 that matches the support column 121d, and the support column 121d moves within the range of the guide portion 63. Specifically, the support column 121d is a cylindrical member formed on the end surface of the drive end bracket 12, preferably cylindrical, or may be other polygonal prism structures; the guide portion 63 is a through hole or through groove formed on the end cover 60. , the through hole or through groove is an arc-shaped hole or arc-shaped groove. During assembly, the support column 121d is embedded in the guide portion 63. The range of the guide portion 63 limits the movement range of the support column 121d, that is, it limits the development unit 10 relative to the drum. The range of unit 20 swing.

In this embodiment, the swing axis of the developing unit 10 is approximately at the middle position in its height direction, and is also the rotation center of the second coupling 59 . When the developing unit 10 is in 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 support column 121d is located at one end of the guide portion 63; when the developing unit 10 is in When moving from the first position to the second position under the force of the pushing member 30, the support column 121d moves from one end to the other end in the guide portion 63, and the lower end of the developing unit 10 swings away from the drum unit 20, driving the The developing roller 15 is separated from the photosensitive drum 22 .

Further, as shown in Figures 22 and 23, the driving end bracket 12 is also provided with an annular flange 123. The annular flange 123 surrounds the periphery of the first through hole 122, and the annular flange 123 can pass through the second through hole 64. protruding to the outside of the end cover 60 , there is a gap 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 force of the pushing member 30 , the annular flange 123 There is no contact between the flange 123 and the second through hole 64 . There is also a gap between the annular flange 123 and the first through hole 122. 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 extends along the axial direction and connects with the second coupling When the shaft device 59 is engaged, 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 covers part of the driving head, which can play a certain supporting and positioning role.

Further, as shown in FIGS. 22 and 23 , the end of the annular flange 123 away from the developing unit 10 is provided with a guide surface 1231 . The guide surface 1231 is an inclined surface and can engage with the second coupling 59 when the driving head of the electronic imaging device It plays a guiding role at this time, making the meshing between the two smoother and shortening the meshing time.

Other structures of the process box in this embodiment are the same as those in Embodiment 4, and will not be described again here.

Embodiment 7

The structure of this embodiment is basically the same as that of the above-mentioned Embodiment 6, except that the structure of the end cover is different.

Referring to Figures 24 and 25, the process box is generally in the shape of a rectangular parallelepiped box, which has a length in the first direction (directions A1 and A2), a width in the second direction (directions B1 and B2), and a width in the third direction. (C1 and C2 directions); one end of the processing box in the A1 direction is the driving end, and the end in the A2 direction is At the conductive end, the developing unit 100 and the drum unit 200 are arranged oppositely in the second direction. The direction from the developing unit 100 toward the drum unit 200 is the B1 direction. One end of the process cartridge along the B1 direction is the front end. The direction from the drum unit 200 toward the developing unit is The direction of 100 is the B2 direction, one end along the B2 direction is the rear end, one end of the processing box along the C1 direction is the upper end, and one end along 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 developing frame 110 is respectively provided with a driving side bracket 120 and a conductive side bracket, a stirring rack, and a powder feeding rack at both ends of the length direction (A1 and A2 directions). The roller and the developing roller are rotatably supported on the driving side brackets 120 and the conductive side brackets at both ends of the length direction of the developing frame 110. The stirring frame, powder feeding roller and developing roller can rotate under the action of the driving assembly, and the stirring frame, powder feeding roller The axial directions of both the roller and the developing roller are along the length direction (first direction) of the developing frame 110 . The toner in the powder bin is stirred by the stirring frame to prevent the toner in the powder bin from agglomerating. At the same time, the toner can also be transported to the direction of the powder feeding roller. The powder feeding roller transports the toner to the developing roller and is absorbed by the charged developing roller. .

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

As shown in Figures 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 rack gear. The driving assembly can be disposed on the box body at the third One end or both ends in one direction (length direction). In this embodiment, the driving component is disposed at the same end of the developing unit 100 in the length direction, preferably the driving end (one end in the A1 direction). The first coupling 310 is provided at one end of the photosensitive drum in the A1 direction, and is used to engage with the photosensitive driving head of the electronic imaging device to receive driving force and drive the photosensitive drum to rotate. The second coupling 320, the developing roller gear 330, the powder feeding roller gear 340, and the mixing rack gear are arranged outside the driving side bracket 120. Specifically, the driving side bracket 120 is provided with a support for supporting the second coupling 320. hole, the second coupling 320 is used to engage with the developing driving head of the electronic imaging device and receive driving force. The second coupling 320 is located at a substantially middle position of the developing unit 100 in the third direction; the developing roller gear 330 is sleeved on The shaft of the developing roller extends from one end of the driving side bracket 120, the powder feeding roller gear 340 is sleeved on the shaft of the powder feeding roller extending from one end of the driving side bracket 120, and the stirring rack gear is sleeved on the stirring rack extending from the driving side. At one end of the bracket 120 , the developing roller gear 330 , the powder feeding roller gear 340 and the stirring rack gear directly or indirectly mesh with the second coupling 320 , so that the second coupling 320 transmits the received driving force to drive development. The roller, powder feeding roller and mixing frame rotate. In the third direction, the second coupling 320 is located above the first coupling 310 (on the C1 direction side).

As shown in FIGS. 24 to 26 , a developing protective cover 130 is also provided on the outside of the driving side bracket 120 . The developing protective cover 130 covers the developing roller gear 330 , the powder feeding roller gear 340 , the stirring rack gear and a part of the second coupling 320 , which can protect the drive components. Specifically, the developing protective cover 130 is provided with a cylindrical portion 131, which protrudes along a side away from the developing frame 110. The cylindrical portion 131 is hollow inside to form a third through hole 132, and the axial direction of the third through hole 132 is Extending along the first direction, a portion of the second coupling 320 extends from the third through hole 132 to the outside of the developing protective cover 130 .

As shown in FIGS. 26 and 27 , the developing protective cover 130 is also provided with an annular flange 123 , and the annular flange 123 surrounds the periphery of the cylindrical portion 131 . There is a gap between the annular flange 123 and the cylindrical part 131, and the inner part of the annular flange 123 The diameter can adapt to the size of the development drive head of the electronic imaging device. When the development drive head of the electronic imaging device extends axially to engage with the second coupling 320, a part of the development drive head extends into the annular flange 123 and the second coupling 320. In the space between the cylindrical parts 131, the annular flange 123 covers a part of the developing drive head, which can play a certain supporting and positioning role.

Further, as shown in FIGS. 26 and 27 , an end of the annular flange 123 away from the developing unit 100 is provided with a guide surface 134 . The guide surface 134 is an inclined surface and can connect the development drive head of the electronic imaging device to the second coupling 320 . It plays a guiding role during meshing, making the meshing between the two smoother and shortening the meshing time.

As shown in Figures 24 to 26 and 28, the conductive side end cover 230 is located outside the conductive side bracket, and the driving side end cover 220 is located outside the developing protective cover 130. Viewed along the length direction of the process cartridge, the driving side end cover Cover 220 at least partially overlaps development shield 130. 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 cover 220 is fixedly connected to the end of the photosensitive frame 210 .

As shown in Figures 24 to 26 and 28, the driving side end cover 220 is provided with a first through hole 221 and a notch 222. When the driving side end cover 220 is installed at the ends of the developing frame 110 and the photosensitive frame 210, the first through hole 221 and the notch 222 are provided. A portion of a 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 engages with the driving head of the electronic imaging device to receive driving force. The notch 222 extends upward and backward from the position corresponding to the second coupling 320 to the upper end and the rear end of the drive side end cover 220 , that is, a vacant portion is dug out on the drive side end cover 220 , and the developing protective cover 130 is mostly exposed through the notch 222, and the internal structure of the process cartridge (especially the internal structure of the developing unit 100) can be observed to a certain extent through the notch 222. When local maintenance is required, there is no need to remove the drive side end cover. 220 can also be achieved, making maintenance more convenient. After the driving side end cover 220 is installed in place, the annular flange 123 of the developing protective cover 130 protrudes from the notch 222 of the driving side end cover 220 and protrudes from the surface of the driving side end cover 220. The annular flange 123 and the driving side end The cover 220 does not contact, that is, the annular flange 123 is completely located within the range of the notch 222 .

As shown in FIGS. 25 to 28 , in this embodiment, the process cartridge also includes a connecting part, a restricting part 224 , a restricted part 136 , a pushing part 400 and an elastic part 500 , which are used to realize the relative position of the developing unit 100 to the drum unit 200 It moves 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. Viewed along the axial direction of the developing roller (first direction), the connecting portion does not overlap with the second coupling 320 .

As shown in FIGS. 25 to 28 , in this embodiment, the connection part includes a support column 135 a and a guide part 223 , and the support column 135 a is provided near one end of the developing protective cover 130 in the third direction, specifically at the end of the developing protective cover 130 . The position on the end face near its lower end. The driving side end cover 220 is provided with a guide portion 223 that matches the support column 135a. The support column 135a moves within the range of the guide portion 223. The guide portion 223 is located below the notch 222 in the third direction, and the support column 135a Corresponding to the position of the guide portion 223, it is also located on the lower side of the notch portion 222, that is, viewed along the axial direction of the developing roller, the connecting portion is always located on the lower side of the notch portion 222, and has no overlapping portion with the notch portion 222, and the second connection portion The shaft 320 and the annular flange 123 and the cylindrical portion 131 on the developing protective cover 130 are all within the range of the notch 222 . Therefore, when viewed along the axial direction of the developing roller, there is no connection between the connecting portion and the second coupling 320 . overlap.

Specifically, as shown in Figures 27 and 28, the support column 135a is a cylindrical member formed on the end surface of the developing protective cover 130, preferably in a cylindrical shape, and can also be in the form of other multi-faceted prisms; the guide portion 223 is formed on the driving The through hole or through groove on the side end cover 220 is an arc-shaped hole or an arc-shaped groove. The guide portion 223 extends generally along the second direction. During assembly, the support column 135a is embedded in the guide portion 223. The range of the guide portion 223 defines the support column The movement range of 135a limits the swing range of the developing unit 100 relative to the drum unit 200.

In this embodiment, as shown in FIGS. 25 to 28 , the driving side end cover 220 is provided with a restricting portion 224 at a position close to the upper edge of the notch 222 , that is, the upper end of the driving side end cover 220 and beside the notch 222 A restricting portion 224 is provided. The restricting portion 224 is a protrusion formed on the inner wall of the driving side end cover 220. The restricting portion 224 extends in the A2 direction; the developing protective cover 130 is provided with a restricted portion 136 that matches the restricting portion 224 and is The restricting part 136 is a protrusion formed on the outer wall of the developing protective cover 130. The restricted part 136 extends in the A1 direction. The restricting part 224 contacts the restricted part 136 when the developing unit 100 moves from the second position to the first position, and In the second direction, the restricting portion 224 is located at the rear side of the restricted portion 136 (the side along direction B2). The restricting portion 224 contacts the restricted portion 136 to play a limiting role and prevent the developing unit 100 from deviating from the first direction. Location. When the developing unit 100 is in 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 contact the photosensitive drum, and the support column 135a is located at one end of the guide portion 223 in the B1 direction; when the developing unit 100 When moved from the first position to the second position by the force of the electronic imaging device, the support column 135 a moves from one end in the B1 direction to an end in the B2 direction in the guide portion 223 , and the lower end of the developing unit 100 moves away from the drum unit 200 The upper end of the developing unit 100 swings in the direction (roughly along the B2 direction), driving the developing roller to separate from the photosensitive drum. At the same time, the upper end of the developing unit 100 swings in the direction closer to the drum unit 200 (roughly moves along the B1 direction), and the restricted portion 136 moves along the B1 direction. separated from the restriction part 224.

As shown in FIG. 26 , the movement of the developing unit 100 from the first position to the second position is realized by the cooperation of the urging member 400 and the force applying 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 mounted on the end face of the developing unit 100. The pushing member 400 is in the shape of a bar-shaped arm, and one end of the pushing member 400 is in contact with the developing unit. The unit 100 is hinged, and the other end 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 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 on the lower end of the developing protective cover 130 , or the pushing member 400 may not be provided on the developing protective cover 130 . A pivot is provided on the end face of the developing unit 100 , and the pushing member 400 One end is sleeved on the supporting shaft, and the installation of the push piece 400 can also be completed. A part of the free end of the pushing member 400 is exposed outside the developing frame 110 from below, so that the force-applying member can contact it from below and exert force on it.

As shown in FIG. 25 , an elastic member 500 is disposed between the drum unit 200 and the developing unit 100 to move the developing unit 100 from the second position to the first position and drive the developing roller to contact 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 also be an elastic rubber, an elastic sponge, an elastic piece, or other components that can provide elastic force.

When the electronic imaging device is not working, the force-applying member contacts the pushing member 400 from below and exerts force on it, causing the pushing member 400 to relatively rotate around its connecting end. After the developing unit 100 is forced, its lower end moves away from the drum unit 200 The direction of swing (roughly along the direction B2) drives the developing roller to separate from the photosensitive drum. The upper end of the developing unit 100 moves in the direction close to the photosensitive drum (roughly along the direction B1), compresses the elastic member 500, and the restricted portion 136 follows the developing unit 100. Move in the B1 direction and separate from the restricting portion 224 . At the same time, the support column 135 a moves from one end in the B1 direction to an end in the B2 direction in the guide portion 223 , and the connecting portion plays a supporting and positioning role during the movement of the developing unit 100 .

When the electronic imaging device needs to work, the force exerted by the force-applying member on the pushing member 400 is removed, and at the same time, the elastic member 500 recovers from its elastic deformation, pushing the developing unit 100 to move from the second position to the first position, and the developing roller contacts the photosensitive drum. The urging member 400 also returns to its original position along with the movement of the developing unit 100 . At the same time, the support column 135a moves from one end in the B2 direction to an end in the B1 direction in the guide portion 223 . The restricted portion 136 is in contact with the restricting portion 224 as the developing unit 100 swings, so that the developing unit 100 is maintained in the first position.

During the movement of the developing unit 100 relative to the drum unit 200 , the annular flange 123 on the developing protective cover 130 is never in contact with the drive side end cover 220 , that is, no matter the developing unit 100 is in the first position or the second position, the annular flange 123 is not in contact with the driving side end cover 220 . None of the edges 123 come into contact with the drive side end cover 220.

Embodiment 8

The structure of the process box of this embodiment is basically the same as that of Embodiment 7, except that the structure of the end cover is different.

As shown in FIGS. 29 to 32 , in this embodiment, the restricting portion 224 is omitted on the driving side end cover 220 , the restricted portion 136 is omitted on the developing protective cover 130 , and the notch is set as a second through hole, that is, the driving side end cover 220 is omitted. The end cap 220 is provided with a first through hole 221 and a second through hole 225, a part of the first coupling 310 is exposed through the first through hole 221, and a part of the second coupling 320 is exposed from the second through hole 225. The first through hole 221 is a circular hole, and the second through hole 225 is generally an elliptical hole. In the third direction, the first through hole 221 and the second through hole 225 have an overlapping portion. The second coupling 320 and the annular flange 123 and the cylindrical portion 131 on the developing protective cover 130 are all within the range of the second through hole 225, and the connecting portion is located below the second through hole 225. Therefore, along the developing When viewed in the axial direction of the roller, there is no overlap between the connecting portion and the second coupling 320 .

During the movement of the developing unit 100 relative to the drum unit 200 , the annular flange 123 on the developing protective cover 130 never contacts the inner edge of the second through hole 225 , that is, no matter the developing unit 100 is in the first position or the second position. , the annular flange 123 will not contact the inner edge of the second through hole 225 .

In this embodiment, as shown in FIG. 31 , the developing roller gear 330 is meshed with the second coupling 320 , and the rotation axis of the developing roller gear 330 is located below the rotation axis of the second coupling 320 in the third direction. In the second direction, the rotation axis of the developing roller gear 330 is located on the front side of the rotation axis of the second coupling 320 . The developing roller gear 330 can be exposed through the second through hole 225, that is, the developing roller gear 330 is located within the range of the second through hole 225. Viewed along the axial direction (first direction) of the developing roller, the developing roller gear 330 is connected to the drive side end cover. 220 no overlap.

During the movement of the developing unit 100 relative to the drum unit 200, the developing roller gear 330 moves accordingly, and the movement trajectory of the developing roller gear 330 generally reciprocates along the second direction, regardless of whether the developing unit 100 is located in the first position or the second position. The developing roller gear 330 is always located within the range of the second through hole 225 , that is, when viewed along the axial direction of the developing roller, the projection of the developing roller gear 330 completely falls into the projection of the second through hole 225 , and the developing roller gear 330 is in contact with the driving side end. The covers 220 never overlap.

Other structures and operating modes of the process box in this embodiment are the same as those in Embodiment 7, and will not be described again here.

Embodiment 9

The structure of this embodiment is basically the same as that of the above-mentioned embodiment, except that during the process of separation or contact between the developing roller and the photosensitive drum, the entire developing unit 100 does not move relative to the drum unit 200 , but the photosensitive drum itself moves relative to the drum unit 200 . The developing unit 100 moves.

As shown in Figures 33 to 36, the two ends of the photosensitive frame 210 in the first direction are respectively provided with integrated or separately formed photosensitive brackets 2101. Taking the driving side as an example, the photosensitive bracket 2101 is provided with a first avoidance portion 2101a. , specifically, the first escape part 2101a is roughly elliptical, so that the first coupling 310 can move in the first escape part 2101a when it receives an external force perpendicular to the axial direction of the photosensitive drum; the photosensitive bracket 2101 is also provided with a charging Roller installation The charging roller installation structure includes a fifth elastic member 2102, an elastic member setting portion 2101b and a mounting slider 2101c (as shown in Figure 36). The elastic member setting portion 2101b is used to install the fifth elastic member 2102, and the mounting slider 2101c is used to install the charging roller and has a first guide groove 2101d. The first guide groove 2101d is engaged with the side wall 2101e of the photosensitive bracket 2101, where both ends of the charging roller are installed on the mounting slider 2101c. End caps are provided on the outside of the photosensitive bracket 2101 in the first direction of the photosensitive frame 210. They are a driving side end cap 220 fixedly installed on one end of the photosensitive frame 210 in the A1 direction and a driving side end cap 220 fixedly installed on one end of the photosensitive frame 210 in the A2 direction. One end of the conductive side end cap 230. The drive side end cover 220 and the conductive side end cover 230 are respectively provided with escape parts that are the same as the escape parts of the photosensitive bracket 2101 and can move in conjunction with the first coupling 310. Taking the drive side as an example, in some embodiments, the drive side The end cover 220 has a second escape portion 2201a that is substantially the same shape as the first escape portion 2101a of the photosensitive bracket 2101. The first coupling 310 passes through the first escape portion 2101a of the photosensitive bracket 2101 and the second escape portion of the drive side end cover 220. Part 2201a is exposed, and the first coupling 310 can move in the two avoidance parts. At the same time, the non-driving side of the process cartridge is also provided with the same escape portion as the driving side. Therefore, the photosensitive drum is rotatably supported on the driving side end cover 220 and the conductive side end cover 230 and can move relative to both, and the photosensitive drum is disposed on the lower end side (the 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 protective cover 130, and the driving side end cover 220, the photosensitive bracket 2101 and the developing protective cover 130 are fixedly connected.

As shown in Figures 35, 37 and 38, the driving side bracket 120 and the developing protective cover 130 are provided with a pushing member 121 that receives the force from the electronic imaging device, a sixth elastic member 122a, and a sixth elastic member 122a for installing the sixth elastic member. The mounting part 123a, the urging member 121 includes a force receiving part 121a, a force applying part 121b and a protrusion 121c. The urging member 121 is installed on the mounting portion 123a of the driving side bracket 120 through the sixth elastic member 122a. The urging portion 121b of the urging member 121 contacts the end of the photosensitive drum to receive the urging member 121 through the force-receiving portion 121a. The force from the electronic imaging device is then applied to the photosensitive drum through the force applying part 121b; the pushing member 121 is also provided with a protrusion 121c, and the developing protective cover 130 is provided with a second guide chute 130c that cooperates with the protrusion 121c. When the pushing member 121 is subjected to an external force, the protrusion 121c can move along the third direction in the second guide groove 130c. The force-bearing part 121a is a force-bearing slope. When the electronic imaging device applies a horizontal force to the force-bearing part 121a, the force-bearing slope decomposes the horizontal force. The component force in the C1 direction causes the pushing member 121 to move along the second guide chute 130c. Move in the C1 direction; the tail portion of the urging member 121 (the other side opposite to the force-receiving portion 121a along the second direction) contacts the drive-side bracket 120 to limit 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 components that can provide elastic force, such as elastic rubber, elastic sponge, and elastic pieces.

When the electronic imaging equipment is working, the developing roller and the photosensitive drum need to be in close contact. When the electronic imaging equipment is not working, the developing roller and the photosensitive drum need to be separated by a certain distance to avoid long-term contact between the developing roller and the photosensitive drum, which may cause photosensitivity. The drum is contaminated by excess developer attached to the developing roller, the developing roller is deformed, or the photosensitive drum is worn.

Based on this, the photosensitive drum in this embodiment is configured to move on the photosensitive frame 210 relative to the developing roller itself, so that the developing roller and the photosensitive drum can be in contact when the electronic imaging device is working and separated when not working. When the process cartridge is installed in the electronic imaging device, the drum unit 200 abuts against components in the electronic imaging device, the drum unit 200 is immovable, and the driving side end cover 220 fixedly connects the developing unit 100 and the drum unit 200, so the developing unit 100 is also Immovable, the photosensitive drum is arranged to be able to move between a first position and a second position relative to the developing roller (ie, relative to the drum unit 200 and the developing unit 100). When the photosensitive drum is in the first position, the developing roller is in contact with the photosensitive drum. Contact; when the photosensitive drum is in the second position, the developing roller is separated from the photosensitive drum.

As shown in Figure 35, when the process cartridge is in the initial position of being loaded into the electronic imaging device, the photosensitive drum and the developing roller are in contact. At this time, the fifth elastic member 2102 is in the initial state, and the protrusion 121c of the pushing member 121 is in the developing protective state. At the C2 direction end of the second guide chute 130c on the cover 130, the urging portion 121b of the urging member 121 does not contact the photosensitive drum, the first coupling 310 is at the C2 direction end of the avoidance portion, and the charging roller and the photosensitive drum When in contact, the sixth elastic member 122a is in the initial state.

When the process cartridge is not developing, the force-receiving part 121a receives the force exerted by the electronic imaging device on the pushing member 121, and the pushing member 121 follows the protrusion 121c along the second guide chute 130c on the developing protective cover 130. Move in the C1 direction. At this time, the sixth elastic member 122a is compressed, the urging part 121b of the urging member 121 contacts the photosensitive drum and exerts force on the photosensitive drum. The first coupling 310 moves in the direction away from the developing roller (roughly along C1 and B1 direction) moves within the first escape portion 2101a of the photosensitive holder 2101 and the second escape portion 2201a of the driving side end cover 220. Since the photosensitive drum and the charging roller are always in contact, under the urging of the photosensitive drum, 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. 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 needs to be developed, the electronic imaging device no longer exerts force on the urging member 121. Due to the reaction force from compression to release of the sixth elastic member 122a, the protrusion 121c of the urging member 121 moves along the second guide slide. The photosensitive drum moves along the C2 direction to the initial position in the groove 130c. At this time, the photosensitive drum loses the force of the urging part 121b of the pushing member 121. Under the force of its own gravity and the charging roller mounting structure (fifth elastic member 2102), the photosensitive drum A coupling 310 moves to the initial position in the direction close to the developing roller (roughly along the C2 and B2 directions) in the first escape portion 2101a of the photosensitive bracket 2101 and the second escape portion 2201a of the driving side end cover 220, and at the same time, the fifth The elastic member 2102 returns to the initial state. At this time, the photosensitive drum moves from the second position separated from the developing roller to the first position in contact with the developing roller.

Embodiment 10

The structure of this embodiment is basically the same as that of the above-mentioned embodiment, except that the structure and operation mode of the pushing member 400 are different.

As shown in Figures 39 to 41, the conductive side end cover 230 is located outside the conductive side bracket, and the driving side end cover 220 is located outside the developing protective cover 130. Viewed along the length direction of the process cartridge, the driving side end cover 220 and The development shield 130 is at least partially overlapped. 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 cover 220 is fixedly connected to the end of the photosensitive frame 210 .

As shown in Figure 41, in this embodiment, the driving side end cover 220 is provided with a first through hole 221 and a second through hole 222a. When the driving side end cover 220 is installed at 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 engages with the driving head of the electronic imaging device to receive driving force. On the developing frame 110 side, the second coupling 320, the cylindrical part 131 and the second through hole 222a are coaxially arranged, and at least a part of the cylindrical part 131 is inserted into the second through hole 222a.

When the electronic imaging device is working, the developing roller 140 and the photosensitive drum 240 need to be in tight contact. When the electronic imaging device is not working, the developing roller 140 and the photosensitive drum 240 need to be separated by a certain distance to prevent the developing roller 140 from being in contact with the photosensitive drum 240 Long-term contact may cause problems such as the photosensitive drum 240 being contaminated by excess developer attached to the developing roller 140 or the developing roller 140 being deformed or the photosensitive drum 240 being worn.

Based on this, the drum unit 200 and the developing unit 100 in this embodiment are configured to move relative to each other, so that the developing roller 140 and the photosensitive drum 240 can be in contact when the electronic imaging device is working and separated when not working. When the process cartridge is installed in the electronic imaging apparatus, the drum unit 200 abuts against components in the electronic imaging apparatus, the drum unit 200 is immovable, and the developing unit 100 is configured to be able to move between a first position and a second position relative to the drum unit 200 When the developing unit 100 is in the first position, the developing roller 140 is in contact with the photosensitive drum 240; when the developing unit 100 is in the second position, the developing roller 140 is separated from the photosensitive drum 240. In this embodiment, the movement mode of the developing unit 100 is to swing with the axis of the second coupling 320 as the rotation center. That is, when the developing unit 100 is in 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. At this time, the upper end of the developing unit 100 is located away 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 moves away from the drum unit 200. The directional swing of the drum unit 200 drives the developing roller 140 to separate from the photosensitive drum 240 . At this time, the upper end of the developing unit 100 swings toward the direction of the drum unit 200 .

As shown in FIGS. 39 to 42 , in this embodiment, the process box further includes a pushing member 400 , and the pushing member 400 cooperates with the force applying member 300 (shown in FIG. 47 ) in the electronic imaging device to achieve When the development operation is not performed, the developing roller 140 is separated from the photosensitive drum 240 .

As shown in Figure 41, the urging member 400 is movably installed on the developing unit 100, and the urging member 400 can rotate between the working position and the avoidance position; specifically, the urging member 400 is rotatably installed on the lower end of the developing protective cover 130 (at the lower end of the developing protective cover 130). C2 direction), the pushing member 400 is generally a long block-shaped member, the length direction of which extends along the second direction. The pushing member 400 includes a main body 410, and the main body 410 is provided with a latching portion 420 and a sliding avoidance surface 430. and abutment surface 440.

As shown in FIGS. 41 to 43 , the locking portion 420 is provided at one end of the main body 410 in the length direction, and the developing protective cover 130 is provided with an engaging portion 133 that matches the locking portion 420 . Preferably, the locking portion 420 It is a clamping slot formed on the main body 410. The joint part 133 is a clamping column provided near the lower end of the developing protective cover 130. The axial direction of the clamping column extends along the third direction. After the clamping part 420 is engaged with the clamping column, the pushing member 400 can rotate around the clamping column, that is, the pushing member 400 can rotate around the clamping column in the plane formed by the first direction and the second direction. That is to say, with the clamping column as the axis, the pushing member 400 can move away from the clamping part 420 One end can swing toward the A1 direction or the A2 direction. Among them, the A2 direction can swing to the avoidance position, and the A1 direction can swing to the working position. Alternatively, the locking part 420 may be a locking post and the joint part 133 may be a locking slot, thereby realizing a rotational connection between the pushing member 400 and the developing cover 130; or the through hole and the rotating shaft may cooperate with each other.

As shown in Figures 43, 45 to 47, the surface of one end of the developing protective cover 130 in the C2 direction is its lower surface 134. The lower surface 134 is a plane, and a groove is provided on the lower surface 134 for supply and pressure. The pusher 400 rotates in the groove, and at the same time, the rotation range of the pusher 400 can be limited. The projection shape of the groove in the third direction is approximately the same as the projection shape of the pushing member 400 in the third direction. The snap portion 420 of the pushing member 400 is close to one end of the groove in the B2 direction, and the groove is in the B1 direction. The inner surface 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. The position where the urging member 400 contacts the second side wall 137 is also called the working position of the urging member 400. In this position When in the working position, the pushing member 400 can accept the separation force of the force applying member 300 to separate the developing roller 140 from the photosensitive drum 240 . When the pushing member 400 is in the working position, it is also in its initial state. When the end of the urging member 400 away from the latching part 420 rotates toward the A2 direction, the urging member 400 rotates from the working position to the avoidance position.

As shown in Figures 42 and 44, at least part of the main body 410 of the pushing member 400 protrudes downward from the lower surface 134 of the developing protective cover 130. The main body 410 is provided with a sliding escape surface 430, and all or at least a part of the sliding escape surface 430 is It protrudes downward from the groove to the lower side of the lower surface 134 so that the sliding escape surface 430 can cooperate with the force applying member 300 of the electronic imaging device.

As shown in Figure 45, in this embodiment, when the pushing member 400 is assembled on the developing protective cover 130, the sliding escape surface 430 is generally facing the A1 direction, and the sliding escape surface 430 is an outwardly protruding arc surface. The extending direction of the sliding escape surface 430 forms a certain angle with the extending direction of the pushing member 400 , and the angle is an acute angle. The extending direction of the sliding escape surface 430 generally extends from the A2 and B2 sides to the A1 and B1 sides. Optionally, the sliding escape surface 430 may also be a flat surface; the sliding escape surface 430 may also be an irregular surface, formed by splicing one or more arcuate surfaces and/or flat surfaces. The extending direction of the urging member 400 is perpendicular to the axis of the photosensitive drum 240 .

As shown in Figures 42, 44 and 45, the pushing member 400 also has a contact surface 440. The contact surface 440 is located at an end of the main body 410 away from the latching part 420. The contact surface 440 is located in the B1 direction of the sliding escape surface 430. One side, and the abutting surface 440 is connected to one end of the sliding escape surface 430 in the B1 direction, the abutting surface 440 is generally facing the B1 direction, the abutting surface 440 can be a plane, and all or at least a part of the abutting surface 440 protrudes downward from The lower surface 134 of the developing protective cover 130 enables the contact surface 440 to contact the force applying member 300 to receive the separation force. When the pushing member 400 is in the working position, in the third direction, the distance between the lowermost end of the abutment surface 440 (one end in the C1 direction) and the lower surface 134 of the developing cover 130 is H1. Preferably, 3mm≤H1≤4.8 mm; in the second direction, the distance between the abutment surface 440 and the first side wall 136a of the groove is D1. Preferably, 0<D1≤2.5 mm. When the pushing part 400 is within the range of H1 and D1, the pushing part 400 can cooperate with the force applying part 300 more precisely, thereby increasing the selectivity of the pushing part 400 to meet the optimization of component size.

Further, as shown in Figure 41, the process box also includes a reset member 600, which is used to exert a force on the pushing member 400 to reset it from the avoidance position to the working position. The reset member 600 is elastic, and the force applying member 300 pushes. When the member 400 rotates, the return member 600 is compressed. Preferably, the return member 600 is a torsion spring, installed on the drive side bracket 120. Specifically, the drive side bracket 120 is provided with a mounting seat 121 for mounting the torsion spring near the lower end, and the coil portion of the torsion spring is set in the mounting seat. 121, one arm of the torsion spring is in contact with the drive side bracket 120, and the other arm is in contact with the side of the main body 410 of the urging member 400 facing the A2 direction. The torsion spring is constructed to always exert force on the urging member 400. The force toward the A1 direction keeps the pushing member 400 in the working position (that is, the initial state of the pushing member 400) without being acted upon by other external forces. Optionally, the reset member 600 may also be a compression spring, a tension spring, an elastic rubber, an elastic sponge, or other elastic components, or other non-elastic reset structures.

As shown in FIG. 39 , an elastic member 500 is disposed between the drum unit 200 and the developing unit 100 to move the developing unit 100 from the second position to the first position and drive the developing roller 140 to contact the photosensitive drum 240 . Specifically, one end of the elastic member 500 is connected to the upper end of the photosensitive frame 210 (one end in the C1 direction), and the other end is connected to the upper end of the developing frame 110 (one end in the C1 direction). The elastic member 500 is preferably a spring, and may also be an elastic rubber, an elastic sponge, an elastic piece, or other components that can provide elastic force.

As shown in Figures 46 and 47, after the process cartridge is installed in place in the imaging device, the pushing member 400 is in the working position, and the force applying member 300 of the electronic imaging device begins to move. After the force applying member 300 moves in the B1 direction When, the force-applying member 300 contacts the sliding escape surface 430, the force-applying member 300 slides along the sliding escape surface 430 and exerts a pushing force on the sliding escape surface 430. This pushing force makes the urging member 400 move around the joint portion 133 toward the A2 direction. swing from The working position swings to the avoidance position, allowing the force-applying member 300 to continue moving in the B1 direction. During the swing of the pushing member 400, the return member 600 is compressed and deformed. When the force-applying member 300 moves to a position separated from the sliding avoidance surface 430 Finally, the pushing force of the force applying member 300 on the sliding avoidance surface 430 disappears, the elastic deformation of the reset member 600 recovers, and the forcing member 400 is pushed to swing toward the A1 direction. The forcing member 400 swings from the avoidance position to the working position, and reaches the force of the working position. The contact surface 440 of the pushing member 400 is opposite to the force applying member 300, that is, the two are at least partially overlapped in the second direction, but the force applying member 300 and the contact surface 440 are not in contact. At this time, the preparation state of the electronic imaging device is completed. , can carry out development work.

When the electronic imaging device is not performing development work, the force applying member 300 moves in the B2 direction. The force applying member 300 contacts the abutting surface 440 and exerts a force on the abutting surface 440. The force received by the abutting surface 440 is forced by the abutting surface 440. The pusher 400 acts on the entire developing unit 100. After the developing unit 100 is stressed, its lower end swings in a direction away from the drum unit 200 (roughly along the direction B2). The developing unit 100 moves from the first position to the second position, driving the developing roller 140. Separated from the photosensitive drum 240 , at the same time, the upper end of the developing roller 140 moves in a direction closer to the photosensitive drum 240 (roughly along the B1 direction), compressing the elastic member 500 .

When the electronic imaging device needs to perform development work, the force exerted by the force applying member 300 on the contact surface 440 is removed, and the elastic member 500 deforms and recovers, pushing the developing unit 100 to move from the second position to the first position. The developing roller 140 and the photosensitive drum 240 contact, development work can be carried out.

Embodiment 11

The structures of the process cartridges in this embodiment are basically the same as those in Embodiment 10, except that the structure of the pushing member 400 is different.

As shown in FIGS. 48 to 50 , in this embodiment, the urging member 400 includes a locking part 420 , a sliding escape surface 430 and a contact surface 440 . The structure of the locking part 420 is the same as that in the tenth embodiment.

As shown in FIG. 50 , in this embodiment, the sliding escape surface 430 is an inwardly concave arc surface. Different shapes of sliding avoidance surfaces 430 can enable the urging member 400 to adapt to the force-applying members 300 of different types of electronic imaging equipment.

As shown in FIGS. 51 and 52 , in this embodiment, when the pushing member 400 is in the working position, in the third direction, the lowest end of the abutment surface 440 (one end in the C1 direction) is 44 feet away from the lower surface 134 of the developing shield 130 The distance is H2, preferably, 4.8mm<H2≤6.5mm; in the second direction, the distance between the abutment surface 440 and the first side wall 136a of the groove is D2, preferably, 2.5mm<D2≤4.7mm . In this embodiment, H2>H1, D2>D1, that is, the protrusion distance of the contact surface 440 of the urging member 400 of this embodiment from the lower surface 134 is greater than the protrusion of the contact surface 440 of the urging member 400 of the tenth embodiment. distance from the lower surface 134; and the distance from the contact surface 440 of the urging member 400 to the first side wall 136a in this embodiment is greater than the distance from the contact surface 440 of the urging member 400 to the first side wall 136a in the tenth embodiment. The distance, that is to say, the distance from the abutting surface 440 of the urging member 400 of this embodiment to the rotation axis of the urging member 400 is compared with the distance from the abutting surface 440 of the urging member 400 to the urging member in the tenth embodiment. The distance between the 400's axes is shorter.

By arranging the contact surface 440 to protrude from the lower surface 134 by different distances, and the distance from the contact surface 440 to the rotation axis, the pushing member 400 can be adapted to the force applying member 300 of different types of electronic imaging equipment, thereby Improve the general performance of the push piece 400.

It should be noted that the shape of the sliding escape surface 430, the position and height of the contact surface 440 and other parameter settings can be adjusted according to the specific structure of the force applying member 300, as long as the corresponding functions can be achieved.

Other structures and operating modes of the process box in this embodiment are the same as those in the tenth embodiment, and will not be described again here.

Embodiment 12

The structure of this embodiment is basically the same as that of the tenth embodiment mentioned above, except that the structure and operation mode of the pushing member 400 are different.

As shown in FIGS. 53 to 59 , the pushing member 400 is generally a long block-shaped member, and its length direction extends along the second direction. That is, the extending direction of the length of the pushing member 400 is perpendicular to the axis of the photosensitive drum 240 . The component 400 includes a main body 410. The main body 410 is provided with a latching portion 420, a sliding escape surface 430 and a contact surface 440.

As shown in Figures 55 to 57, the snap portion 420 is provided at one end of the main body 410 in the height direction (C1 direction), and the developing protective cover 130 is provided with a joint portion 133 that matches the snap portion 420. Preferably, The latching part 420 is a latching groove formed on the main body 410 , and the joint part 133 is a latching post provided near the lower end of the developing protective cover 130 . The axial direction of the latching post extends along the second direction. After the latching part 420 is engaged with the latching post, , the forcing member 400 can rotate around the clamping column, that is, the forcing member 400 can rotate around the clamping column in the plane formed by the first direction and the third direction, the rotation axis of the forcing member 400 is along the second direction, and the rotation of the separation member The axis is perpendicular to the axis of the photosensitive drum 240 (along the first direction). That is to say, with the clamping column as the axis, the end of the pushing member 400 away from the clamping portion 420 can swing in the A1 direction or the A2 direction, wherein, toward the A2 The direction can be swung to the avoidance position, and the direction A1 can be swung to the working position. The end of the pushing member 400 away from the latching portion 420 is closer to the axis of the developing roller 140 when it is in the avoidance position than when it is in the working position. Alternatively, the locking part 420 may be a locking post and the joint part 133 may be a locking slot, thereby realizing a rotational connection between the pushing member 400 and the developing cover 130; or the through hole and the rotating shaft may cooperate with each other.

As shown in FIG. 54 , at least part of the main body 410 of the pushing member 400 protrudes downward from the lower surface 134 of the developing protective cover 130 . The main body 410 is provided with a sliding escape surface 430 , and all or at least part of the sliding escape surface 430 extends from the groove. The middle protrudes downward to the lower side of the lower surface 134 so that the sliding escape surface 430 can cooperate with the pushing member 300 of the electronic imaging device.

In this embodiment, when the pushing member 400 is assembled on the developing protective cover 130, the sliding escape surface 430 is generally facing the A1 direction, the sliding escape surface 430 is a plane, and the sliding escape surface 430 is a plane composed of the second direction and the third direction. inner extension.

In some other embodiments, the sliding escape surface can also be an outwardly protruding or inwardly concave arc surface, and the extension direction of the sliding escape surface 430 can form a certain included angle with the extending direction of the pushing member 400, and the included angle It is an acute angle, and the extending direction of the sliding escape surface 430 extends generally from the A2 and B2 sides to the A1 and B1 sides. The sliding avoidance surface 430 may also be an irregular surface, formed by splicing one or more arcuate surfaces and/or flat surfaces.

As shown in Figures 54, 56 and 58, the pushing member 400 also has a contact surface 440. The contact surface 440 is located at one end of the main body 410 in the length direction. The contact surface 440 is located in the B1 direction of the sliding escape surface 430. side, and the abutting surface 440 is connected to one end of the sliding escape surface 430 in the B1 direction, the abutting surface 440 is generally facing the B1 direction, the abutting surface 440 is a straight surface, and the abutting surface is in the plane composed of the first direction and the third direction. Extended, that is, the abutment surface 440 is perpendicular to the rotation axis of the urging member 400 (along the second direction), and the abutment surface 440 is also perpendicular to the axis of the photosensitive drum 240 (along the first direction); and the abutment surface 440 is completely Or at least a part protrudes downward from the lower surface 134 of the developing protective cover 130 so that the contact surface 440 can contact the force applying member 300 to receive the separation force.

As shown in Figures 55, 58 and 59, the process box also includes a reset part 600, which is used to exert a force on the pushing part 400 to reset it from the avoidance position to the working position. The reset part 600 is elastic, and the pushing part 300 When the pushing member 400 is pushed and rotated, the restoring member 600 is compressed. Preferably, the return member 600 is a torsion spring installed on the developing protective cover 130 Specifically, a mounting seat 135 for mounting a torsion spring is provided near the lower end of the developing protective cover 130. The coil portion of the torsion spring is sleeved on the mounting seat 135, and one arm of the torsion spring is in contact with the developing protective cover 130. On the other hand, the other arm abuts on the main body 410 of the urging member 400, and the torsion spring is constructed to always exert a force toward the A1 direction on the urging member 400, so that the urging member 400 remains in the position without being acted upon by other external forces. The working position (that is, the initial state of the pushing member 400). In this embodiment, the mounting seat 135 can also be a part of the end of the joint portion 133 (the clamping column). The installation seat 135 and the joint portion 133 are integrated to simplify the structure of the developing protective cover 130 .

Furthermore, the pushing member 400 further includes a clamping portion 450 connected to the reset member 600. The clamping portion 450 is provided at the other end of the main body 410 opposite to the abutment surface 440 in the length direction. The clamping portion 450 can be a hole. or a groove, which is recessed or penetrated inwardly from the end surface of the main body 410 toward the direction B2, and the other arm of the return member 600 (torsion spring) extends into the clamping portion 450 and contacts the inner wall of the clamping portion 450, and the clamping portion is set The connecting portion 450 is connected to the reset piece 600 to prevent the reset piece 600 from dislocating.

In some other embodiments, the return member 600 may be a compression spring, a tension spring, an elastic rubber, an elastic sponge, or other elastic components, or may be other non-elastic return structures.

As shown in Figures 58 and 59, after the process cartridge is installed in the imaging device, the pushing member 400 is in the working position, and the force applying member 300 of the electronic imaging device begins to move. After the force applying member 300 moves in the B1 direction When, the force-applying member 300 contacts the sliding escape surface 430, the force-applying member 300 slides along the sliding escape surface 430 and exerts a pushing force on the sliding escape surface 430. This pushing force makes the urging member 400 move around the joint portion 133 toward the A2 direction. Swing, swing from the working position to the avoidance position, so that the force applying member 300 can continue to move in the B1 direction. During the swing of the pushing member 400, the reset member 600 is compressed and deformed. When the force applying member 300 moves to the sliding avoidance surface 430 After the separation position, the pushing force of the force applying member 300 on the sliding avoidance surface 430 disappears, the elastic deformation of the reset member 600 recovers, and the pushing member 400 is pushed to swing in the direction A1, swing from the avoidance position to the working position, and reach the pushing position of the working position. The contact surface 440 of the component 400 is opposite to the force-applying component 300, that is, the two are at least partially overlapped in the second direction, and the force-applying component 300 is not in contact with the contact surface 440. At this time, the preparation state of the electronic imaging device is completed and can be performed. Development work.

When the electronic imaging device is not performing development work, the force applying member 300 moves in the B2 direction. The force applying member 300 contacts the abutting surface 440 and exerts a separation force on the abutting surface 440. The separation force received by the abutting surface 440 is forced by the contact surface 440. The pusher 400 acts on the entire developing unit 100. After the developing unit 100 is stressed, its lower end swings in a direction away from the drum unit 200 (roughly along the direction B2). The developing unit 100 moves from the first position to the second position, driving the developing roller 140. Separated from the photosensitive drum 240 , at the same time, the upper end of the developing unit 100 moves in a direction closer to the photosensitive drum 240 (roughly along the B1 direction), compressing the elastic member 500 .

When the electronic imaging device needs to perform development work, the separation force of the pushing member 300 on the contact surface 440 is removed, the elastic member 500 deforms and recovers, pushing the developing unit 100 to move from the second position to the first position, and the developing roller 140 and the photosensitive drum 240 contact, development work can be carried out.

Embodiment 13

An embodiment of the present application also discloses a process cartridge that is detachably installed into an electronic imaging device. The electronic imaging device includes a driving head. When the process cartridge is installed into the electronic imaging device, the process cartridge can interact with the electronic imaging device. The driving head of the device cooperates to drive the rotating member in the process 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 form a box body, and the drum unit 20 includes a photosensitive drum 22 . The developing unit 10 includes a developing roller and a conveyor. Powder roller, photosensitive drum 22, display The shadow roller and the powder feeding roller are rotatably arranged on the box body respectively, and the driving assembly is arranged on the end of the box body for driving connection with the driving head to receive the driving force output by the driving head and transmit the driving force to the photosensitive drum. 22. The developing roller, powder feeding roller and other rotating parts make each rotating part rotate.

Specifically, the driving assembly includes a first power receiving component, 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. The first power receiving member is set to the first power receiving member. Coupling 51 , the first coupling 51 is connected to the photosensitive drum 22 . The first transmission member 52 is set as a first gear, and the first gear is sleeved on the first coupling 51 . The second transmission member 53 is set as 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. The powder feeding roller gear 56 and the developing wheel gear 55 are respectively connected with the second gear. Engage. The third transmission member 54 is set as an intermediate gear, and the intermediate gear meshes with the first gear and the second gear respectively.

When the process cartridge is installed in the electronic imaging device, the first coupling 51 can be drivingly connected with the driving head, so that the driving head drives the first coupling 51 to rotate, and then drives the first gear and the first gear through the first coupling 51. When the photosensitive drum 22 rotates, the rotation of the first gear will drive the second gear to rotate through the intermediate gear. The rotation of the second gear will drive the powder feeding roller gear 56 and the developing wheel gear 55 to rotate, thereby driving the powder feeding roller and the developing roller to rotate.

Further, the process box also includes a developing protective cover 130 and a driving side end cover. The developing protective cover 130 is arranged outside the end surface of the box body and is located at the end of the developing roller. The driving side end cover covers the outside of the developing protective cover 130. A first mounting post and a second mounting post are provided inside the drive 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 Figure 61, the developing protective cover 130 is provided with a groove 130a, and the process cartridge also includes a pushing member 400. The pushing member 400 is movably disposed on the developing protective cover 130 and at least partially penetrates the groove 130a, and is forced to The pusher 400 can rotate within the groove 130a to have a working position and an escape position.

Specifically, the process cartridge also includes a reset member 600, the developing protective cover 130 includes a joint portion 133, the pushing member 400 has a snap portion 420, a sliding escape surface 430 and a contact surface 440, and the snap portion 420 and the joint portion 133 are rotatable. ground connection, so that the urging member 400 can rotate around the joint portion 133 . The reset member 600 is a torsion spring, the coil portion of the torsion spring is sleeved on the mounting seat of the drive side bracket, one arm of the torsion spring is in contact with the drive side bracket, and the other wall of the torsion spring is in contact with the pushing member 400 on, so that the push member 400 can be forced to return to the working position from the avoidance position through the torsion spring.

When the process cartridge is installed in place in the imaging device, the pushing member 400 is in the working position, and the force applying member of the electronic imaging device begins to move. During the movement of the force applying member, the sliding avoidance surface 430 will be pushed, causing the pushing member 400 to move. The member 400 swings around the joint part 133 and swings from the working position to the avoidance position. During the swing of the pushing member 400, the reset member 600 is compressed and deformed; when the force-applying member moves to a position separated from the sliding avoidance surface 430, The pushing force of the force applying member on the sliding avoidance surface 430 disappears, the elastic deformation of the reset member 600 is restored, and the pushing member 400 is pushed to swing from the avoidance position to the working position. When the pushing member 400 reaches the working position, the abutting surface 440 and the force applying member Relatively, that is, the two are at least partially overlapped in the second direction, but the force-applying member is not in contact with the contact surface 440. At this time, the preparation state of the electronic imaging device is completed and the development work can be performed.

When the electronic imaging device is not performing development work, the force-applying member moves to contact the abutting surface 440 and exerts force on the abutting surface 440. The force received by the abutting surface 440 acts on the entire developing unit through the urging member 400. 10. After the developing unit 10 is stressed, its lower end swings away from the drum unit 20. The developing unit 10 moves from the first position to the second position, driving the developing roller to separate from the photosensitive drum 22. At the same time, the upper end of the developing roller moves closer. The directional movement of the photosensitive drum 22 compresses the elastic member connected between the drum unit and the developing unit.

When the electronic imaging device needs to perform development work, the force exerted by the force-applying member on the contact surface 440 is removed, and the elastic member deforms and recovers, pushing the developing unit 10 to move from the second position to the first position, and the developing roller contacts the photosensitive drum 22. Development work can be performed.

Other structures of the process box of this embodiment are basically the same as those of Embodiment 1 or Embodiment 10, and will not be described again here.

The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or modifications within the technical scope disclosed in the present application. Replacements shall be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A process cartridge detachably installed into an electronic imaging device, the electronic imaging device including a drive head, characterized in that the process cartridge includes:

box body;

A photosensitive drum is rotatably arranged on the box body;

A developing roller is rotatably arranged on the box body, and the developing roller has a first position and a second position relative to the photosensitive drum. When the developing roller is in the first position, the developing roller is in contact with the photosensitive drum, and when the developing roller is in the second position, the developing roller and the photosensitive drum are in a separated state;

Driving assembly, the driving assembly is arranged at the end of the box body, the driving assembly includes a first power receiving component, the first power receiving component is used to receive the driving force output by the driving head and receive the driving force after receiving the driving force. The photosensitive drum and the developing roller are capable of receiving the driving force transmitted by the first power receiving member and rotating when receiving the driving force.
The process box according to claim 1, wherein the process box further includes a powder feeding roller, the powder feeding roller is rotatably provided on the box body, and the driving assembly further includes a first transmission member, The second transmission member, the third transmission member and the powder feeding roller gear, the first power receiving component is set as a first coupling, the first coupling is connected to the photosensitive drum, the first transmission member Connected to the first coupling, the second transmission member is connected to the first transmission member through the third transmission member, the powder feeding roller gear is connected to the second transmission member, and the The powder feeding roller gear is connected to the powder feeding roller, and the developing roller is connected to the second transmission member.
The process cartridge according to claim 2, wherein the driving assembly further includes a developing roller gear, the developing roller gear is connected to the developing roller, the second transmission member is a second gear, and the The second gear meshes with the developing roller gear and the powder feeding roller gear respectively.
The process cartridge according to claim 3, wherein the first transmission member is a first gear, the first gear is sleeved on the first coupling, and the third transmission member is a first gear. An intermediate gear, the intermediate gear meshes with the first gear and the second gear respectively;

And when the developing roller moves from the first position to the second position, or moves from the second position to the first position, the intermediate gear always remains in contact with the first gear and the first gear. The respective meshing of the second gear.
The process box according to claim 4, characterized in that the process box further includes an end cover, the end cover is covered on the outside of the end surface of the box body, and a first mounting post is provided on the inside of the end cover. and a second mounting column, the second gear is sleeved on the first mounting column, and the intermediate gear is sleeved on the second mounting column.
The process cartridge according to claim 3, wherein the third transmission member is a transmission belt, one end of the transmission belt is sleeved on the first transmission member, and the other end of the transmission belt is sleeved on the Second transmission part.
The process box according to claim 6, wherein the transmission belt is a crawler belt, transmission teeth are provided on the inside of the crawler belt, and the first transmission member is a sprocket capable of cooperating with the transmission teeth, The second transmission member includes a third gear portion capable of meshing with the crawler track.
The process cartridge according to claim 6, wherein the third transmission member is a belt, so The first transmission member is a round wheel, the second transmission member includes a round wheel part, one end of the belt is sleeved on the round wheel, and the other end of the belt is sleeved on the round wheel part.
The process cartridge according to claim 2, wherein the first transmission member is a first gear, the second transmission member is a second gear, and the third transmission member is a developing roller gear, The developing roller gear is connected to the developing roller, and the developing roller gear meshes with the first gear and the second gear respectively, and the powder feeding roller gear meshes with the second gear.
The process box according to claim 9, characterized in that, the process box further includes an end cover and a transmission structure, the end cover is covered on the outside of the end surface of the box body, and the inside of the end cover is provided with a third Three mounting posts, the developing roller gear is sleeved on the third mounting post, and the developing roller gear is connected to the developing roller through the transmission structure.
The process cartridge according to claim 10, wherein the transmission structure includes a connecting member and a transmitting member, the connecting member is provided at one end of the developing roller, and the transmitting member is connected to the developing roller gear, And the transmission piece can fit and abut with the connecting piece.
The process cartridge according to claim 11, wherein the connecting member includes a third contact portion, the third contact portion is configured as two third protrusions, and the transmission portion includes a second contact portion. part, the second contact part is set as two second protrusions, and the two second protrusions can abut and engage with the two third protrusions.
The process cartridge according to claim 11, wherein the process cartridge further includes a developing frame, the developing frame is provided with a first column, the driving assembly further includes a torsion spring, the torsion spring is sleeved on the The first column is provided with one end of the torsion spring in contact with the developing frame, and the other end of the torsion spring in contact with the transmission part.
The process cartridge according to any one of claims 1 to 13, wherein the process cartridge further includes a pushing member, the pushing member is operably connected to the developing roller, and when the pushing member When receiving the force of the force applying member of the electronic imaging device, the pushing member can drive the developing roller to move from the first position to the second position.
A processing box, characterized in that it includes:

box body;

A photosensitive drum is rotatably arranged on the box body;

A developing roller is rotatably arranged on the box body;

A powder feeding roller is rotatably provided on the box body;

Driving assembly, the driving assembly is disposed at the end of the box body, and the driving assembly includes a first coupling and a second coupling, the first coupling and the second coupling are used for Receive the driving force output from the electronic imaging device and transmit it to the photosensitive drum, the developing roller and the powder feeding roller respectively;

Driving side end cover, the driving side end cover is arranged on the outside of the driving assembly, and the driving side end cover is provided with a first through hole and a notch part, and a part of the first coupling passes through the third A through hole is exposed outside the drive side end cover, and a part of the second coupling is exposed outside the drive side end cover through the notch.
The process cartridge according to claim 15, wherein the notch extends to an upper end and a rear end of the drive side end cover.
The process cartridge of claim 15, wherein the drive assembly further includes a developing roller Gear and powder feed roller gear, the first coupling is connected to the photosensitive drum, the developing roller gear is sleeved on one end of the developing roller, the powder feeding roller gear is sleeved on the powder feeding roller The powder feeding roller gear is connected to one end of the second coupling, and the developing roller gear is connected to one of the first coupling and the second coupling.
The process cartridge according to claim 17, wherein the process cartridge further includes a developing protective cover, the developing protective cover is arranged outside the driving assembly, and the driving side end cover is arranged on the developing protecting cover. Outside the cover, a part of the first coupling passes through the first through hole to be exposed to the outside of the drive side end cover, and a part of the second coupling passes through the developing guard in turn. The cover and the notch are exposed to the outside of the drive side end cover.
The process cartridge according to claim 18, wherein the developing protective cover includes a cylindrical portion and an annular flange, the cylindrical portion is provided with a third through hole, and the annular flange surrounds the circular flange. The periphery of the cylinder part, and there is a gap between the annular flange and the cylindrical part. The gap is used to limit the position of the developing drive head of the electronic imaging device. The annular flange passes through the notch part. , the second coupling passes through the third through hole.
The process cartridge according to claim 18, wherein the developing protective cover is provided with a support column, the drive side end cover is provided with a guide part, and the support column is movable within the guide part;

When the support pillar is located at one end of the guide part, the developing roller is in the first position, and the developing roller is in contact with the photosensitive drum. When the support pillar is located at the other end of the guide part, , the developing roller is in the second position, and the developing roller and the photosensitive drum are in a separated state.
The process cartridge according to claim 20, wherein in the axial direction of the developing roller, the projection of the guide portion does not coincide with the projection of the second coupling at all.
The process cartridge according to claim 20, wherein the driving side end cover includes a restricting part, the developing protective cover includes a restricted part, and the restricted part can cooperate with the restricting part to limit the position. To prevent the developing roller from deviating from the first position.
The process cartridge according to claim 21, wherein the notch is set as a second through hole, and a part of the first coupling is exposed to the outside of the drive side end cover through the first through hole. , a part of the second coupling is exposed to the outside of the drive side end cover through the second through hole.
The process cartridge according to claim 23, wherein the developing roller gear is connected to the second coupling, and in the axial direction of the developing roller, the projection of the developing roller gear completely falls into within the projection of the second through hole.
The process cartridge according to any one of claims 15 to 24, wherein the process cartridge further includes a pushing member, the pushing member is operably connected to the developing roller, and when the pushing member When receiving the force of the force applying member of the electronic imaging device, the pushing member can drive the developing roller to move from the first position to the second position.
The process cartridge according to claim 17, wherein the driving assembly further includes a first transmission member, a second transmission member and a third transmission member, and the first transmission member is sleeved on the first coupling shaft. the second transmission member is sleeved on the second coupling, the third transmission member meshes with the first transmission member and the developing roller gear, the powder feeding roller gear meshes with the The second transmission part is meshed;

And when the developing roller moves from the first position to the second position, or moves from the second position to the first position, the third transmission member always maintains contact with the first transmission member and the development roller gear. Engage separately.
The process cartridge according to claim 17, wherein the driving assembly further includes a second transmission member, the second transmission member is sleeved on the second coupling, the powder feeding roller gear and the The developing roller gears are meshed with the second transmission member respectively.
The process cartridge according to claim 27, wherein the second transmission member is provided with an inner cavity, the driving assembly further includes a third elastic member, and the third elastic member is disposed in the inner cavity, The second coupling is engaged with the inner cavity and connected with the third elastic member, so that the second coupling can be displaced along the axial direction of the box body.
The process cartridge according to claim 28, wherein the second coupling includes a guide part, the process cartridge further includes a pushing member and a fourth elastic member, and the pushing member passes through the fourth elastic member. The elastic member is connected to the box body, and the pushing member is arranged in cooperation with the guide part;

When the urging member is acted upon by the force applying member of the electronic imaging device, the urging member exerts force on the guide portion, causing the second coupling to move closer to the second transmission member. move in the direction.
The process cartridge according to claim 29, wherein the process cartridge further includes a powder outlet blade, a first conductive member and a second conductive member, and the powder outlet blade, the first conductive member and the second conductive member Two conductive members are respectively provided on the box body, the first end of the first conductive member is connected to the developing roller, and the first end of the second conductive member is connected to the powder blade;

When the pushing member is not acted upon by the force-applying member, the second end of the second conductive member is in contact with the second end of the first conductive member; when the urging member is acted upon When the force is exerted by the force applying member, the pushing member can push the second end of the second conductive member to move, so that the second end of the second conductive member is connected with the second end of the first conductive member. end is in detached state.
The process cartridge according to claim 17, wherein the process cartridge further includes a drive side bracket, a sixth elastic member and a urging member, the urging member is installed on the drive side through the sixth elastic member. a side bracket, and the pushing member can contact the photosensitive drum;

When the urging member is exerted by the force exerting member of the electronic imaging device, the urging member can push the photosensitive drum to move from the first position to the second position, so that the photosensitive drum is in contact with the developing device. The rollers are in a separated state, and when the pushing member is not exerted by the force applying member of the electronic imaging device, the photosensitive drum returns to the first position, so that the photosensitive drum is in contact with the developer. .
The process cartridge according to claim 31, wherein the process cartridge further includes a photosensitive bracket and a driving side end cover, the driving side end cover is disposed outside the photosensitive bracket, and the photosensitive bracket is provided with A first escape part, the drive side end cover is provided with a second escape part corresponding to the position of the first escape part, and the first coupling passes through the first escape part and the second escape part. part, and the first coupling can move within the first escape part and the second escape part.
The process cartridge according to claim 31, wherein the process cartridge further includes a developing protective cover, the developing protective cover is disposed outside the driving side bracket, and the developing protective cover is provided with a second guide Slide groove, the pushing member includes a protrusion, and the protrusion can move in the second guide slide groove.
A process box, applied to electronic imaging equipment, the electronic imaging equipment includes a force applying member, characterized by The process box includes:

a drum unit, the drum unit including a photosensitive drum;

a developing unit, the developing unit including a developing roller;

A pushing piece, which is movably provided on the developing unit, and the pushing piece can swing between a working position and an avoidance position;

When the process cartridge is installed in an electronic imaging device, the pushing member can swing from the working position to the avoidance position under the pushing force when the force applying member moves; when the pushing member When in the working position, the pushing member can separate the developing roller from the photosensitive drum under the force exerted by the force applying member.
The process cartridge according to claim 34, wherein the developing unit further includes a developing protective cover, the developing protective cover is provided with a groove, and the urging member at least partially penetrates the groove, and The urging member can swing from the working position to the escape position or from the escape position to the working position in the groove.
The process cartridge according to claim 35, wherein the developing protective cover includes a joint;

The push piece has a snap portion, a sliding escape surface and a contact surface, and the snap portion is rotatably connected to the joint portion;

When the urging member is in the working position, the sliding escape surface can contact the force-applying member, so that the urging member swings to the avoidance position under the force of the force-applying member. , or the contact surface can be in contact with the force-applying member, so that the pushing member drives the developing roller to rotate under the action of the force-applying member, so that the developing roller and the photosensitive drum are separated .
The process cartridge according to claim 36, wherein the latching portion is a latching groove and the joint portion is a latching column; or

The latching part is a latching column, and the joint part is a latching slot.
The process cartridge according to claim 36, wherein the process cartridge further includes a driving side bracket and a reset member, the driving side bracket is arranged at an end of the developing roller, and the developing protective cover is arranged at the end of the developing roller. On the outside of the driving side bracket, the reset member is provided on the driving side bracket and is used to reset the pushing member from the avoidance position to the working position.
The process cartridge according to claim 38, wherein the driving side bracket includes a mounting base, the return member is a torsion spring, and the coil portion of the torsion spring is sleeved on the mounting base, and the torsion spring is sleeved on the mounting base. One arm of the spring is in contact with the drive side bracket, and the other wall of the torsion spring is in contact with the urging member.
The process cartridge according to claim 39, wherein the pushing member further has a snap-in portion, the snap-in portion is arranged opposite to the abutment portion, and one wall of the torsion spring abuts against the abutment portion. The clamping part.