Processing box

Abstract

The present application relates to a process cartridge detachably mounted in an image forming apparatus provided with a driving force transmission member. The processing box comprises a drum unit, a driving unit and a braking unit, the drum unit comprises a drum frame and a photosensitive drum rotatably supported on the drum frame, and the drum unit is provided with a driving side and a conductive side along the length direction of the drum unit; the driving unit is arranged on the driving side and is used for being jointed with a driving force transmission component of the imaging equipment so as to receive driving force for driving the photosensitive drum to rotate; the braking unit is arranged on the conductive side and provides braking force for the photosensitive drum, and the direction of the braking force is opposite to the direction of the driving force. According to the processing box, the driving unit and the braking unit are arranged on the two sides of the drum unit, so that the drum unit receives the driving force and the braking force from the two sides of the drum unit in the length direction, a structure for receiving the driving force and a structure for receiving the braking force on the processing box are separated, connection between the processing box and the imaging equipment is more reliable, and the connection stability is better; and the driving transmission is smoother.

Description

Technical Field

[0001] This application relates to the technical field of printing consumables, and particularly to a processing cartridge. Background Art

[0002] A processing cartridge is a consumable that can be detachably installed on an imaging device. The imaging device is provided with a force transmission unit. The existing force transmission unit includes a driving force transmission component and a braking force application component. The driving force transmission component is used to transmit a driving force to the processing cartridge, and the braking force application component can apply a load to the photosensitive drum; a driving force receiving portion that engages with the driving force transmission component and a braking force receiving portion that engages with the braking force application component are provided on the corresponding processing cartridge.

[0003] In the prior art, the force transmission unit engages with the drum coupling of the processing cartridge through multiple components to transmit the driving force and the braking force to the processing cartridge. Most of the drum couplings are integrally formed parts, and they only rely on their own structures to guide the multiple components of the force transmission unit to engage with their preset parts respectively, that is, the drum coupling is provided with multiple guiding surfaces to guide the translation and rotation of different components on the force transmission unit. Therefore, there are problems of unstable connection between the processing cartridge and the imaging device and unsmooth driving transmission. Utility Model Content

[0004] This application provides a processing cartridge, which is used to solve the problems of unstable connection between the existing processing cartridge and the force transmission unit of the imaging device and unsmooth driving transmission.

[0005] A processing cartridge provided by an embodiment of this application is detachably installed in an imaging device provided with a driving force transmission member. The processing cartridge includes:

[0006] A drum unit, the drum unit includes a drum frame and a photosensitive drum rotatably supported on the drum frame. Along the length direction of the drum unit, the drum unit has a driving side and a conductive side;

[0007] A driving unit, the driving unit is arranged on the driving side and is used to engage with the driving force transmission member of the imaging device to receive the driving force for driving the photosensitive drum to rotate;

[0008] A braking unit, the braking unit is arranged on the conductive side, and the braking unit provides a braking force to the photosensitive drum, and the direction of the braking force is opposite to the direction of the driving force.

[0009] In a possible design, the driving unit includes:

[0010] A drum coupling, the drum coupling is connected to the photosensitive drum, and the drum coupling has a concave portion, and the concave portion is used to engage with the positioning boss of the driving force transmission member;

[0011] A power receiving portion, which is in transmission connection with the drum coupling and in transmission connection with the driving force transmission member to receive the driving force of the driving force transmission member and drive the photosensitive drum to rotate.

[0012] In a possible design, the power receiving portion includes a transmission member rotatably connected to the drum frame. The transmission member has a cylindrical first transmission portion and a second transmission portion. The first transmission portion abuts against the reinforcing portion of the driving force transmission member and receives the driving force from the driving force transmission member through the frictional force with the reinforcing portion. The second transmission portion abuts against the drum coupling and drives the drum coupling and the photosensitive drum to rotate through the frictional force with the drum coupling.

[0013] In a possible design, the drum coupling includes a cylindrical portion and a front end portion. The cylindrical portion is connected to the photosensitive drum and abuts against the second transmission portion. The front end portion is connected to the cylindrical portion, and the concave portion is provided on the surface of the front end portion facing away from the cylindrical portion.

[0014] In a possible design, the power receiving portion further includes a rolling bearing and a rotating shaft. The rolling bearing is connected to the drum frame. The rotating shaft is rotatably connected to the rolling bearing, and the transmission member is sleeved on the rotating shaft.

[0015] In a possible design, the rotating shaft has cams and / or grooves distributed along its circumferential direction. The cams are located inside the second transmission portion. The transmission member has a flange, and the flange is fitted into the grooves.

[0016] In a possible design, the surface of the second transmission portion facing the first transmission portion is provided with an uneven step for abutting against the reinforcing portion.

[0017] In a possible design, the first transmission portion and the second transmission portion are coaxially arranged. The second transmission portion is closer to the photosensitive drum than the first transmission portion. The outer diameter of the second transmission portion is larger than the outer diameter of the first transmission portion.

[0018] In a possible design, a drum bearing connected to the photosensitive drum is provided on the conductive side. The braking unit includes a roller and a bushing. The roller is rotatably connected to the drum frame. The bushing is sleeved on the outer periphery of the roller and is in interference contact with the drum bearing. The bushing provides a braking force to the photosensitive drum through the frictional force with the drum bearing.

[0019] In a possible design, a plurality of the power receiving portions are arranged along the circumferential direction of the photosensitive drum, and / or a plurality of the braking units are arranged along the circumferential direction of the drum bearing.

[0020] In the present application, since the driving unit and the braking unit are arranged on both sides of the drum unit, the drum unit receives the driving force and the braking force from both sides of its length direction respectively, so that the structure for receiving the driving force and the structure for receiving the braking force on the processing cartridge are separated, thereby making the connection between the processing cartridge and the imaging device more reliable, the connection stability better, and the driving transmission smoother.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present application. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of an imaging device in the prior art;

[0023] Figure 2 is Figure 1 an exploded view of the force transmission unit in

[0024] Figure 3 is Figure 1 a cross-sectional view of the force transmission unit in

[0025] Figure 4 is a schematic structural diagram of the processing cartridge provided by the present application in a specific embodiment;

[0026] Figure 5 is Figure 4 a schematic structural diagram of the engagement between the processing cartridge and the driving force transmission member in

[0027] Figure 6 is Figure 4 a partial cross-sectional view of the processing cartridge in a specific embodiment in

[0028] Figure 7 is Figure 6 a partial exploded view of the structure of the processing cartridge in

[0029] Figure 8 is Figure 6 a cross-sectional view of the transmission member and the rotating shaft in

[0030] Figure 9 is Figure 4 a partial cross-sectional view of the processing cartridge in another specific embodiment in

[0031] Figure 10 is Figure 9 a cross-sectional view of the transmission member and the rotating shaft in

[0032] Figure 11 is Figure 10 an exploded view of

[0033] Figure 12 is Figure 4Partial cross-sectional view of the processing cartridge in yet another specific embodiment;

[0034] Figure 13 is Figure 12 Cross-sectional view of the transfer member and the rotating shaft in the [processing cartridge];

[0035] Figure 14 is Figure 13 exploded view of [the processing cartridge];

[0036] Figure 15 is Figure 4 Cross-sectional view of the conductive side of the processing cartridge in the [processing cartridge];

[0037] Figure 16 is Figure 15 Cross-sectional view of the conductive side of the processing cartridge in another direction in the [processing cartridge];

[0038] Figure 17 is Figure 15 Exploded view of a partial structure of the processing cartridge in the [processing cartridge].

[0039] Reference numerals: M - imaging device; 100 - processing cartridge;

[0040] 100Y - first processing cartridge;

[0041] 100M - second processing cartridge;

[0042] 100C - third processing cartridge;

[0043] 100K - fourth processing cartridge; 160 - door;

[0044] 170 - main assembly;

[0045] 171 - tray;

[0046] 180 - driving force transmission member;

[0047] 180a - first flange portion;

[0048] 180b - first protrusion;

[0049] 180c - reinforcing portion;

[0050] 180d - positioning boss; 185 - developing drive coupling; 201 - rotating member;

[0051] 201a - second protrusion;

[0052] 201b - assembling portion; 202 - support shaft;

[0053] 203 - force transmission unit; 204 - first engaging member; 206 - braking member;

[0054] 207 - Brake force transmission member; 208 - Second engaging member; 310 - Developing unit;

[0055] 311 - Developing frame;

[0056] 320 - Drum unit;

[0057] 321 - Drum frame;

[0058] 322 - Driving side end cap;

[0059] 323 - Conductive side end cap;

[0060] 323a - Support pillar;

[0061] 324 - Photosensitive drum;

[0062] 325 - Drum bearing;

[0063] 330 - Developing coupling;

[0064] 340 - Drum coupling;

[0065] 341 - Cylindrical part;

[0066] 342 - Front end part;

[0067] 342a - Recess;

[0068] 343 - Elastic member;

[0069] 350 - Power receiving part;

[0070] 351 - Transmission part;

[0071] 351a - First transmission part;

[0072] 351b - Second transmission part;

[0073] 351c - Concave-convex step;

[0074] 351d - Flange;

[0075] 352 - Rolling bearing;

[0076] 353 - Rotating shaft;

[0077] 353a - Cam;

[0078] 353b - Through hole;

[0079] 353c - Groove;

[0080] 360 - Braking unit;

[0081] 361 - Roller;

[0082] 362 - Bush.

[0083] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application. Detailed implementation manners

[0084] For a better understanding of the technical solutions of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0085] It should be clear that the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without making creative efforts belong to the scope of protection of this application.

[0086] The terms used in the embodiments of this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. The singular forms "a", "the" and "said" used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0087] It should be understood that the term "and / or" used herein is only a description of the associated relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0088] It should be noted that the orientation terms such as "upper", "lower", "left" and "right" described in the embodiments of this application are described from the angles shown in the accompanying drawings, and should not be construed as limiting the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element.

[0089] As Figure 1 shown, there is a conventional imaging device M, including a main component 170, a tray 171 and a door 160. A receiving portion, a separating mechanism, a transfer unit, etc. are provided in the main component 170. The tray 171 can accommodate a processing cartridge 100 and can move relative to the main component 170 to install the processing cartridge 100 into the receiving portion of the main component 170. The door 160 is provided outside the main component 170 and can open or close the receiving portion of the main component 170.

[0090] Among them, the tray 171 can generally accommodate four detachably mounted processing cartridges 100, namely the first processing cartridge 100Y, the second processing cartridge 100M, the third processing cartridge 100C, and the fourth processing cartridge 100K. The four processing cartridges 100 are arranged substantially horizontally. The processing cartridge 100 stores a developer. When the processing cartridge 100 is installed in the accommodating portion of the main assembly 170, it can receive the rotational driving force of the imaging device M, so that the imaging device M can perform imaging using the developer in the processing cartridge 100. At the same time, the imaging device M supplies bias voltages (such as charging bias voltage, developing bias voltage, etc.) to the first to fourth processing cartridges 100 (100Y, 100M, 100C, 100K) respectively.

[0091] Specifically, the tray 171 is configured to be movable in a substantially horizontal direction in a state where the imaging device M is installed on a horizontal surface. By opening the door 160 of the imaging device M, the tray 171 can be removed from or installed on the imaging device M.

[0092] The main assembly 170 is provided with a force transmission unit 203. When the processing cartridge 100 is installed in the accommodating portion of the main assembly 170, the force transmission unit 203 can engage with the processing cartridge 100 and transmit a driving force to the processing cartridge 100. Among them, the force transmission unit 203 includes a driving force transmission component and a braking force application component.

[0093] As Figure 2 and Figure 3 shown, the driving force transmission component includes a rotating member 201 and a driving force transmission member 180. The rotating member 201 is rotatably supported on a support shaft 202, and the support shaft 202 is fixed to the main assembly 170. A motor (not shown in the figure) in the main assembly 170 can drive the rotating member 201 to rotate. The driving force transmission member 180 is assembled on the rotating member 201 in a manner movable along the axial direction M1. Among them, the axial direction M1 is the rotation axis of the driving force transmission member 180. In the direction of the axis M1, the direction from the driving force transmission member 180 toward the rotating member 201 is the M1A direction, and the direction from the rotating member 201 toward the driving force transmission member 180 is the M1B direction.

[0094] Specifically, the driving force transmission member 180 includes a first flange portion 180a provided at its end. The rotating member 201 has a fitting portion 201b. The first flange portion 180a can cooperate with the fitting portion 201b and is supported by the fitting portion 201b. The driving force transmission member 180 is further provided with a first protrusion 180b protruding from the first flange portion 180a. The rotating member 201 has a second protrusion 201a. The first protrusion 180b can contact the second protrusion 201a, so as to transmit the driving force from the rotating member 201 to the driving force transmission member 180, realizing the rotation of the driving force transmission member 180 driven by the rotating member 201. It can be understood that the rotating member 201 does not limit the movement of the driving force transmission member 180 along the axial direction M1.

[0095] In addition, the driving force transmission member 180 further includes a reinforcing portion 180c and a positioning boss 180d. The reinforcing portion 180c and the positioning boss 180d are provided at the end of the driving force transmission member 180 away from the first flange portion 180a. The positioning boss 180d is located at the middle position of the reinforcing portion 180c. The reinforcing portion 180c can enhance the rigidity of the driving force transmission member 180.

[0096] As Figure 2 and Figure 3 shown, the braking force application assembly includes: a braking member 206, a first engaging member 204, a second engaging member 208, and a braking force transmission member 207. Among them, the braking member 206 is fixedly connected to the support shaft 202 and can generate a braking force. The braking force transmission member 207 passes through the through holes in the middle of the first engaging member 204 and the second engaging member 208 and is then connected to the braking member 206, so as to be able to transmit the braking force generated by the braking member 206 to the first engaging member 204 and the second engaging member 208. The first engaging member 204 and the second engaging member 208 move synchronously.

[0097] The existing processing cartridge receives the driving force and the braking force from the imaging device M by engaging with the force transmission unit 203.

[0098] The present application provides a processing cartridge 100, which is detachably installed in an imaging device M provided with a driving force transmission member 180. As Figure 4 shown, the processing cartridge 100 includes a developing unit 310, a drum unit 320, a driving unit, and a braking unit 360.

[0099] The developing unit 310 includes a developing frame 311, a developing roller, a powder feeding roller, and a blade. The developing frame 311 encloses a powder bin for storing the developer. The developing frame 311 is generally in the shape of a long box, and at both ends of the developing frame 311 in the length direction, a driving-side bearing and a conductive-side bearing are respectively provided. The powder feeding roller and the developing roller are rotatably supported on the driving-side bearing and the conductive-side bearing, and the axial directions of the powder feeding roller and the developing roller are both along the length direction of the developing frame 311. The powder feeding roller and the developing roller can rotate under the drive of a driving unit. The powder feeding roller transports the developer to the developing roller, and then the developer is adsorbed by the charged developing roller.

[0100] Specifically, the developing unit 310 further includes: a developing coupling 330, a developing roller gear, and a powder feeding roller gear. The developing coupling 330, the developing roller gear, and the powder feeding roller gear are arranged outside the driving-side bearing. Specifically, the developing coupling 330 engages with a developing drive connector 185 of the imaging device M to receive the driving force from the imaging device M. A support hole for supporting the developing coupling 330 is provided on the driving-side bearing. The developing roller gear is sleeved on one end of the shaft of the developing roller extending out of the driving-side bearing, and the powder feeding roller gear is sleeved on one end of the shaft of the powder feeding roller extending out of the driving-side bearing. The developing roller gear and the powder feeding roller gear are directly or indirectly engaged with the developing coupling 330 to transmit the driving force received by the developing coupling 330, thereby driving the developing roller and the powder feeding roller to rotate.

[0101] The drum unit 320 includes a drum frame 321, a photosensitive drum 324, and a charging roller. The length direction of the drum frame 321 is the same as the length direction of the developing frame 311. At both ends of the drum frame 321 in the length direction, a driving-side end cap 322 and a conductive-side end cap 323 are respectively provided. The photosensitive drum 324 is rotatably supported on the driving-side end cap 322 and the conductive-side end cap 323.

[0102] Specifically, the photosensitive drum 324 is arranged on the lower end side of the drum frame 321 in the height direction. The axial direction of the photosensitive drum 324 is the same as the length direction of the drum frame 321, and the axial direction of the photosensitive drum 324 is also the M1 direction. The developing roller and the photosensitive drum 324 are close to each other. Due to the potential difference between the developing roller and the photosensitive drum 324, the developer adsorbed on the developing roller is transferred to the photosensitive drum 324. After the toner on the photosensitive drum 324 is transferred by the transfer belt of the imaging device M, an image is formed on a recording material (such as paper). Among them, the charging roller is used to charge the surface of the photosensitive drum 324 with uniform charge, so that the photosensitive drum 324 can adsorb the toner.

[0103] The driving unit is arranged on the driving side of the drum unit 320 and engages with a driving force transmission member 180 to receive the driving force from the imaging device M, and then drives the photosensitive drum 324 to rotate. The braking unit 360 is arranged on the conductive side of the drum unit 320. The braking unit 360 provides a braking force to the photosensitive drum 324, and the direction of the braking force is opposite to the direction of the driving force.

[0104] In this embodiment, since the driving unit and the braking unit 360 are arranged on both sides of the drum unit 320, the drum unit 320 receives the driving force and the braking force from both sides in its length direction respectively, so that the structures for receiving the driving force and the braking force on the processing cartridge are separated. Furthermore, the connection between the processing cartridge and the imaging device M is more reliable, the connection stability is better, and the driving transmission is smoother.

[0105] The structure of the driving unit will be described below.

[0106] In a specific embodiment, as Figures 4 to 6 shown, the driving unit includes: a drum coupling 340 and a power receiving portion 350. The drum coupling 340 is connected to the photosensitive drum 324. The drum coupling 340 has a concave portion 342a for engaging with the positioning boss 180d of the driving force transmission member 180. The power receiving portion 350 is in transmission connection with the drum coupling 340 and is in transmission connection with the driving force transmission member 180 to receive the driving force of the driving force transmission member 180 and drive the photosensitive drum 324 to rotate. Among them, the photosensitive drum 324 is supported by the drum coupling 340 on the driving side end cover 322.

[0107] In this embodiment, as Figure 5 and Figure 6 shown, the positioning boss 180d extends into the concave portion 342a, and the cooperation between the two can position the engagement process of the processing cartridge and the driving force transmission member 180, so that the driving force transmission member 180 is accurately engaged with the drum coupling 340. The driving force transmission member 180 transmits the driving force to the power receiving portion 350, and the power receiving portion 350 then transmits the driving force to the drum coupling 340 to drive the drum coupling 340 and the photosensitive drum 324 to rotate together, so that the transmission of the driving force from the driving force transmission member 180 to the photosensitive drum 324 is relatively smooth. Since the power receiving portion 350 maintains the transmission connection state with the driving force transmission member 180, the connection between the processing cartridge and the driving force transmission member 180 is also relatively stable.

[0108] Specifically, as Figure 6 shown, the drum coupling 340 includes: a cylindrical portion 341 and a front end portion 342. At least a part of one end of the cylindrical portion 341 in the M1B direction is inserted into one end of the photosensitive drum 324, so as to be fixedly connected to the photosensitive drum 324. The front end portion 342 is arranged at one end of the cylindrical portion 341 in the M1A direction. The concave portion 342a is arranged on the end face of the front end portion 342 facing the M1A direction and is located at the central axis position of the front end portion 342.

[0109] Optionally, the front end portion 342 can be made of an elastomer (such as rubber) that can undergo a certain amount of deformation, so as to eliminate the influence of certain angular deviation and interference when the driving force transmission member 180 is docked with the drum coupling 340, enabling the two to be smoothly joined.

[0110] Optionally, the front end portion 342 is set to be telescopic, that is, the front end portion 342 has a certain amount of movement relative to the cylindrical portion 341 in the M1 direction, which can also make the driving force transmission member 180 and the drum coupling 340 better joined. For example, an elastic member 343 is provided between the cylindrical portion 341 and the front end portion 342.

[0111] Specifically, the power receiving portion 350 includes a transmission member 351 rotatably connected to the drum frame 321. The transmission member 351 has a cylindrical first transmission portion 351a and a second transmission portion 351b. The first transmission portion 351a abuts against the reinforcing portion 180c and receives the driving force from the driving force transmission member 180 through the friction between them. The second transmission portion 351b abuts against the cylindrical portion 341 and drives the drum coupling 340 and the photosensitive drum 324 to rotate through the friction between them.

[0112] Among them, the first transmission portion 351a and the second transmission portion 351b are coaxially arranged, and the second transmission portion 351b is closer to the photosensitive drum 324 than the first transmission portion 351a. The outer diameter of the second transmission portion 351b is larger than the outer diameter of the first transmission portion 351a.

[0113] When the driving force transmission member 180 extends in the M1B direction, the circumferential surface of the first transmission portion 351a contacts the circumferential surface of the reinforcing portion 180c. When the driving force transmission member 180 rotates, the transmission member 351 is rotated through the friction between the circumferential surface of the reinforcing portion 180c and the first transmission portion 351a. The circumferential surface of the second transmission portion 351b contacts the circumferential surface of the cylindrical portion 341. When the transmission member 351 rotates, the drum coupling 340 is driven to rotate through the friction between the circumferential surface of the second transmission portion 351b and the circumferential surface of the cylindrical portion 341, and the photosensitive drum 324 rotates synchronously with the drum coupling 340.

[0114] Since the first transmission portion 351a remains in contact with the reinforcing portion 180c and the second transmission portion 351b remains in contact with the cylindrical portion 341, the transmission of the driving force from the driving force transmission member 180 to the photosensitive drum 324 is relatively smooth, and the connection between the driving unit and the driving force transmission member 180 is also relatively stable.

[0115] Further, as Figure 6 and Figure 7As shown, the power receiving part 350 further includes a rolling bearing 352 and a rotating shaft 353. The outer ring of the rolling bearing 352 is fixed to one side of the driving side end cover 322 along the M1A direction. The rotating shaft 353 is rotatably connected to the inner ring of the rolling bearing 352. The transmission member 351 is sleeved on the rotating shaft 353 and can rotate synchronously with the rotating shaft 353.

[0116] In one embodiment, as Figures 6 to 8 shown, the rotating shaft 353 has a round rod-like structure.

[0117] In another embodiment, as Figures 9 to 11 shown, a cam 353a is provided on the rotating shaft 353. The cam 353a is correspondingly arranged inside the second transmission part 351b, so as to provide support for the second transmission part 351b and maintain the abutting state between the second transmission part 351b and the cylindrical part 341.

[0118] In still another embodiment, as Figures 12 to 14 shown, a through hole 353b is provided on the cam 353a. A part of the transmission member 351 can pass through the through hole 353b, so that the connection between the transmission member 351 and the rotating shaft 353 is more reliable, and the transmission member 351 is prevented from falling off the rotating shaft 353.

[0119] Furthermore, a groove 353c is also provided on the rotating shaft 353. The transmission member 351 has a flange 351d adapted to the groove 353c. The flange 351d is fitted into the groove 353c to prevent the transmission member 351 from falling off the rotating shaft 353.

[0120] For the above embodiments, the transmission member 351 can be a sleeve-shaped member made of soft rubber material, so that a large frictional force can be formed between the first transmission part 351a and the reinforcing part 180c, and a large frictional force can be formed between the second transmission part 351b and the cylindrical part 341, so as to realize friction transmission. Among them, the soft rubber material can be a thermoplastic rubber material (TPR), and the transmission member 351 is formed by injection molding.

[0121] Specifically, when manufacturing the power receiving part 350, first insert the rotating shaft 353 into the mold, and then inject the molten TPR raw material into the mold. The molten TPR raw material forms a wrapped sleeve-shaped member (i.e., the transmission member 351) on the outside of the rotating shaft 353, and then the integral formed by the rotating shaft 353 and the transmission member 351 is installed on the rolling bearing 352.

[0122] Furthermore, as Figures 7 to 14As shown, when the driving force transmission member 180 is engaged with the driving unit in place, the end face of the reinforcing portion 180c contacts the end face of the second transmission portion 351b facing the M1A direction. Therefore, uneven steps 351c can be provided on the end face of the second transmission portion 351b facing the M1A direction, thereby increasing the frictional force between the transmission member 351 and the reinforcing portion 180c and better transmitting the driving force.

[0123] Furthermore, the number of power receiving portions 350 can be multiple. The multiple power receiving portions 350 are distributed on the circumferential periphery of the drum coupling 340 and are all in contact with the drum coupling 340. When the power receiving portions 350 receive the driving force from the driving force transmission member 180, the multiple power receiving portions 350 rotate synchronously, thereby better driving the drum coupling 340 and the photosensitive drum 324 to rotate.

[0124] Preferably, the number of power receiving portions 350 is two. It can be understood that the number of power receiving portions 350 can also be three.

[0125] In addition, as Figure 5 shown, the circumferential surface of the reinforcing portion 180c has a certain taper, that is, along the M1B direction, the outer diameter of the reinforcing portion 180c gradually becomes smaller. In order to better contact the reinforcing portion 180c, the first transmission portion 351a can also be provided with a taper matching the reinforcing portion 180c, that is, along the M1B direction, the outer diameter of the first transmission portion 351a gradually becomes larger.

[0126] The structure of the braking unit 360 will be described below.

[0127] In a specific embodiment, as Figures 15 to 17 shown, a drum bearing 325 is provided at one end of the photosensitive drum 324 where the drum coupling 340 is not provided. The photosensitive drum 324 is supported by the drum bearing 325 on the conductive side end cover 323. The braking unit 360 includes: a roller 361 and a bushing 362. The roller 361 is rotatably connected to the drum frame 321. The bushing 362 is sleeved on the roller 361, and the circumferential surface of the bushing 362 is in interference contact with the circumferential surface of the drum bearing 325, so that the bushing 362 provides a braking force to the photosensitive drum 324 through the frictional force between the bushing 362 and the drum bearing 325, thereby making the structure of the braking unit 360 relatively simple.

[0128] Specifically, a support column 323a is provided on the side of the conductive side end cover 323 facing the driving side end cover 322. The roller 361 is sleeved on the support column 323a and can rotate relative to the support column 323a.

[0129] More specifically, the bushing 362 can be a rubber bushing. When the photosensitive drum 324 receives a driving force and rotates, the bushing 362 generates a frictional force on the drum bearing 325, and the photosensitive drum 324 needs to overcome the braking effect of this frictional force to drive the bushing 362 and the roller 361 to rotate synchronously. When the photosensitive drum 324 does not receive a driving force, the frictional force between the bushing 362 and the drum bearing 325 can slow down the rotation speed of the photosensitive drum 324 until the photosensitive drum 324 stops rotating.

[0130] Furthermore, the number of the braking units 360 can be multiple. The multiple braking units 360 are distributed on the circumferential periphery of the drum bearing 325 and are all in interference contact with the circumferential surface of the drum bearing 325.

[0131] Preferably, the number of the braking units 360 is three, and the three braking units 360 are evenly distributed, so as to better provide a braking force for the photosensitive drum 324.

[0132] In this application, since the photosensitive drum 324 does not need to receive a braking force from the force transmission unit 203 through the drum coupling 340, the structure of the drum coupling 340 is simplified, and at the same time, the problems of unstable connection between the existing processing cartridge and the imaging device and unsmooth drive transmission are solved. The processing cartridge in this application has the advantages of simple alignment and engagement processes with the driving force transmission member 180, more stable engagement, not easy to disengage, and more stable and smooth power transmission, improving the use quality of the processing cartridge.

[0133] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A process cartridge detachably mounted in an imaging device provided with a driving force transmission member, characterized in that: The processing box comprises: A drum unit (320), the drum unit (320) comprising a drum frame (321) and a photosensitive drum (324) rotatably supported on the drum frame (321), wherein along a length direction of the drum unit (320), the drum unit (320) has a driving side and a conductive side; a driving unit, the driving unit being arranged on the driving side and being used to engage with a driving force transmitting member (180) of the imaging device to receive a driving force for driving the photosensitive drum (324) to rotate; A braking unit (360), wherein the braking unit (360) is arranged on the conductive side, and the braking unit (360) provides a braking force to the photosensitive drum (324), wherein the direction of the braking force is opposite to the direction of the driving force.

2. The process cartridge according to claim 1, wherein: The driving unit comprises: a drum coupling (340), the drum coupling (340) being connected to the photosensitive drum (324), the drum coupling (340) having a recess (342a), the recess (342a) being used to engage with a positioning boss (180d) of the driving force transmission member (180); A power receiving part (350), the power receiving part (350) is drivingly connected to the drum coupling (340), and the power receiving part (350) is drivingly connected to the driving force transmission member (180) to receive the driving force of the driving force transmission member (180) and drive the photosensitive drum (324) to rotate.

3. The process cartridge according to claim 2, wherein: The power receiving part (350) includes a transmission member (351) rotatably connected to the drum frame (321), and the transmission member (351) has a cylindrical first transmission part (351a) and a second transmission part (351b), the first transmission part (351a) abuts against the reinforcement part (180c) of the driving force transmission member (180), and receives the driving force from the driving force transmission member (180) through the friction force between the first transmission part (351a) and the reinforcement part (180c), and the second transmission part (351b) abuts against the drum coupling (340), and drives the drum coupling (340) and the photosensitive drum (324) to rotate through the friction force between the first transmission part (351a) and the reinforcement part (180c).

4. The process cartridge according to claim 3, wherein: The drum coupling (340) comprises: A cylindrical portion (341), the cylindrical portion (341) being connected to the photosensitive drum (324) and abutting against the second transmission portion (351b); A front end portion (342), the front end portion (342) is connected to the cylindrical portion (341), and the recess (342a) is arranged on a surface of the front end portion (342) that is away from the cylindrical portion (341).

5. The process cartridge according to claim 3, wherein: The power receiving part (350) further includes: A rolling bearing (352), the rolling bearing (352) being connected to the drum frame (321); A rotating shaft (353) is rotatably connected to the rolling bearing (352), and the transmission member (351) is sleeved on the rotating shaft (353).

6. The process cartridge according to claim 5, wherein: The rotating shaft (353) has a cam (353a) and / or a groove (353c) distributed along its circumference, and the cam (353a) is located inside the second transmission part (351b); the transmission member (351) has a flange (351d), and the flange (351d) is embedded in the groove (353c).

7. The process cartridge according to claim 3, wherein: A concave-convex step (351c) is provided on the surface of the second transmission portion (351b) facing the first transmission portion (351a), and the concave-convex step (351c) is used to abut against the reinforcement portion (180c).

8. The process cartridge according to claim 3, wherein: The first transmission part (351a) and the second transmission part (351b) are coaxially arranged, and the second transmission part (351b) is closer to the photosensitive drum (324) relative to the first transmission part (351a); The outer diameter of the second transmission part (351b) is greater than the outer diameter of the first transmission part (351a).

9. The process cartridge according to claim 2, wherein: The conductive side is provided with a drum bearing (325) connected to the photosensitive drum (324); the braking unit (360) comprises: A roller (361), the roller (361) being rotatably connected to the drum frame (321); A shaft sleeve (362) is sleeved on the outer circumference of the roller (361) and is in interference contact with the drum bearing (325). The shaft sleeve (362) provides a braking force to the photosensitive drum (324) through the friction between the shaft sleeve (362) and the drum bearing (325).

10. The process cartridge according to any one of claims 2 to 9, characterized in that: The conductive side is provided with a drum bearing (325) connected to the photosensitive drum (324); A plurality of the power receiving parts (350) are arranged along the circumference of the photosensitive drum (324), and / or a plurality of the braking units (360) are arranged along the circumference of the drum bearing (325).

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