Processing box

Abstract

The utility model provides a processing box which comprises a developing unit, a photosensitive unit and a speed reducing mechanism, a first transmission unit is in transmission connection with a driving force receiving part, a second driving unit is in transmission connection with an input shaft, and the speed reducing mechanism comprises a first transmission unit and a second transmission unit which are in transmission connection. The first transmission unit comprises a first transmission part and a second transmission part which are arranged side by side along the axial direction of the developing roller, and the rotating speed ratio of the first transmission part to the second transmission unit is greater than that of the second transmission part to the second transmission unit; in the developing state, the second transmission unit is in transmission connection with the first transmission part, and in the non-developing state, the second transmission unit can move relative to the first transmission unit to be in transmission connection with the second transmission part. According to the processing box, when the photosensitive drum needs to be cleaned, the second transmission unit is switched to be connected with the second transmission part from being connected with the first transmission part, the rotating speed of the developing roller is reduced, the abrasion loss of the surface of the developing roller is reduced, and the service life of the developing roller is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electrophotographic imaging, and in particular to a process cartridge. BACKGROUND

[0002] The process cartridge is widely used in electrophotographic imaging devices such as laser printers, copiers, fax machines, etc. The process cartridge includes a developing unit and a photosensitive unit. The developing cartridge includes a developing roller, and the photosensitive assembly includes a photosensitive drum. During the imaging process, the developer carried by the developing roller can be transferred to the photosensitive drum to develop the latent image on the photosensitive drum.

[0003] In the related art, in the non-developing state, the process cartridge will perform a cleaning program. At this time, only the photosensitive drum needs to rotate, and the developing roller does not need to rotate. However, since the developing roller and the photosensitive drum share one motor or the developing roller obtains the rotating driving force from the photosensitive drum, the developing roller will be rotated. When the developing roller rotates, it rubs against the powder outlet knife, which is prone to friction and wear, thereby reducing the service life of the developing roller. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the embodiments of the present application aim to provide a process cartridge. In the developing state, the developing roller can rotate normally. In the non-developing state, the rotating speed of the developing roller is reduced, which can reduce the wear amount on the surface of the developing roller and prolong the service life of the developing roller.

[0005] The embodiments of the present application provide a process cartridge, which comprises:

[0006] The developing unit comprises a first cartridge body, a developing roller, and a driving force receiving member. The developing roller is rotatably arranged in the first cartridge body. The driving force receiving member is used to receive a driving force to drive the developing roller to rotate. The developing roller comprises an input shaft.

[0007] The photosensitive unit comprises a second cartridge body and a photosensitive drum. The developing unit is arranged in the second cartridge body. The photosensitive drum is rotatably arranged in the second cartridge body. The developing roller is used to supply developer to the photosensitive drum to develop the latent image on the photosensitive drum.

[0008] The speed reduction mechanism is arranged in the developing unit. The speed reduction mechanism comprises a first transmission unit and a second transmission unit in transmission connection. The first transmission unit is in transmission connection with the driving force receiving member. The second transmission unit is in transmission connection with the input shaft. The first transmission unit comprises a first transmission part and a second transmission part arranged side by side along the axial direction of the developing roller. The speed ratio of the second transmission part to the second transmission unit is greater than the speed ratio of the first transmission part to the second transmission unit.

[0009] In the developing state, the second transmission unit is in transmission connection with the first transmission part, and in the non-developing state, the second transmission unit can move relative to the first transmission unit to be in transmission connection with the second transmission part.

[0010] In some embodiments, the first transmission unit is located on the side of the driving force receiving member close to the first cartridge body, the processing cartridge comprises a switching mechanism for receiving a switching force from the image forming device, the switching mechanism is operatively connected to the developing unit, and the second transmission unit can move relative to the first transmission unit under the action of the switching force.

[0011] In some embodiments, the first transmission part is in abutting fit with the second transmission part in the axial direction, the second transmission unit comprises a third transmission part, in the developing state, the third transmission part is in transmission connection with the first transmission part, and in the non-developing state, the third transmission part is separated from the first transmission part, and the third transmission part moves relative to the first transmission part to be in transmission connection with the second transmission part.

[0012] Alternatively, the first transmission part and the second transmission part are arranged in axial spacing, the second transmission unit comprises a third transmission part and a fourth transmission part arranged side by side in the axial direction of the developing roller, in the developing state, the third transmission part is in transmission connection with the first transmission part, and the fourth transmission part is separated from the first transmission part and the second transmission part, and in the non-developing state, the fourth transmission part is in transmission connection with the second transmission part, and the third transmission part is separated from the first transmission part and the second transmission part.

[0013] In some embodiments, the first transmission part is a full-tooth gear structure.

[0014] And / or, the second transmission part is a full-tooth gear structure or a toothless gear structure.

[0015] And / or, the third transmission part is a full-tooth gear structure,

[0016] And / or, the fourth transmission part is a full-tooth gear structure.

[0017] In some embodiments, the processing cartridge comprises a first elastic member, the first elastic member is sleeved on the outer periphery of the input shaft and abuts between the second transmission unit and the first cartridge body, and the first elastic member is used to switch the second transmission unit between transmission connection with the first transmission part and transmission connection with the second transmission part.

[0018] In some embodiments, the first cartridge is movable relative to the second cartridge, in the developing state, the developing roller is in contact with the photosensitive drum, in the non-developing state, the first cartridge is capable of moving the developing roller relative to the photosensitive drum to separate from the photosensitive drum;

[0019] Alternatively, there is no relative movement between the first cartridge and the second cartridge, in the developing state and the non-developing state, the developing roller remains in contact with the photosensitive drum.

[0020] In some embodiments, the switching mechanism is capable of swinging under the action of the switching force, and the switching mechanism is fixedly connected with the first cartridge;

[0021] The second transmission unit includes a connecting shaft and an abutting portion, one end of the connecting shaft is provided with a connecting hole, the input shaft of the developing roller is matched with the connecting hole, and the abutting portion protrudes from the connecting shaft away from the one end of the connecting hole in the axial direction;

[0022] The side wall of the second cartridge in the axial direction is formed with an inclined stop surface, from the top side to the bottom side, the inclined stop surface extends in the direction away from the photosensitive drum, the abutting portion is separably abutted with the inclined stop surface in the axial direction, the abutting portion is capable of being abutted with the inclined stop surface under the action of the switching force, and is capable of moving relative to the first cartridge and the first transmission unit under the action of the switching force and the abutting force of the inclined stop surface.

[0023] In some embodiments, the processing cartridge includes a second elastic member, one end of the second elastic member is connected with the first cartridge, and the other end is connected with the second cartridge, and the second elastic member is used to drive the first cartridge to move the developing roller and the speed reduction mechanism relative to the second cartridge to contact the developing roller with the photosensitive drum after the switching force is removed.

[0024] In some embodiments, the second transmission unit includes a connecting shaft and an abutting portion, one end of the connecting shaft is provided with a connecting hole, the input shaft of the developing roller is matched with the connecting hole, and the abutting portion protrudes from the connecting shaft away from the one end of the connecting hole in the axial direction;

[0025] The switching mechanism includes a moving rod and a retaining member, one end of the moving rod is rotatably connected with the first cartridge, and the other end is used to receive the switching force from the image forming device, the retaining member is rotatably connected with the first cartridge and connected with the moving rod, the retaining member has an abutting inclined surface, the abutting portion is separably abutted with the abutting inclined surface in the axial direction, and the abutting portion is capable of moving relative to the first cartridge and the first transmission unit under the action of the switching force and the abutting force of the abutting inclined surface.

[0026] In some embodiments, the retainer is provided with a retaining surface, and a snap-fit ​​is formed on one side wall of the second housing along the axial direction. When the abutting portion separates from the abutting inclined surface, the retaining surface separates from the snap-fit. When the abutting portion abuts against the abutting inclined surface, the retaining surface engages with the snap-fit.

[0027] And / or, the switching mechanism further includes a third elastic element, one end of which is connected to the moving element and the other end of which is connected to the moving rod. The third elastic element is used to drive the moving rod to move relative to the retaining element after the switching force is removed.

[0028] The processing cartridge provided in this application embodiment features a speed reduction mechanism that allows the developing roller to rotate at different speeds in developing and non-developing states. In developing state, the developing roller can rotate at a normal speed without affecting developing reliability. When it is necessary to switch to non-developing state to clean the photosensitive drum, the speed of the developing roller is reduced by switching the second transmission unit from being connected to the first transmission unit to being connected to the second transmission unit. This reduces wear on the surface of the developing roller, thereby extending its service life. Furthermore, this process does not affect the rotation of the photosensitive drum, facilitating cleaning of the photosensitive drum. The overall structure of the processing cartridge has high reliability. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the processing box according to the first embodiment of this application;

[0030] Figure 2 for Figure 1 An exploded view of the structure shown.

[0031] Figure 3 for Figure 2 The diagram shows the cooperation between the driving force receiving device and the first transmission unit.

[0032] Figure 4 for Figure 2 The diagram shows the structure of the photosensitive unit.

[0033] Figure 5 for Figure 1 A partial structural schematic diagram of the processing box shown;

[0034] Figure 6 for Figure 1 The diagram shows the interaction between the processing box and the force-applying component in the developing state, wherein the force-applying component is in the first position;

[0035] Figure 7 for Figure 6 A schematic diagram of the processing box from another perspective;

[0036] Figure 8 for Figure 1 The diagram shows the interaction between the processing box and the force-applying component in the non-developing state, where the force-applying component is in the second position.

[0037] Figure 9 for Figure 8 A schematic diagram of the processing box from another perspective;

[0038] Figure 10 This is a schematic diagram of the processing box according to the second embodiment of this application;

[0039] Figure 11 for Figure 10 An exploded view of the processing box shown.

[0040] Figure 12 for Figure 11 The diagram shows the structure of the second end cap.

[0041] Figure 13 for Figure 10 The diagram shows the interaction between the processing box and the force-applying component. The force-applying component is in the middle position, the retaining surface is separated from the buckle, the abutting part is separated from the abutting slope, and the second transmission unit abuts against the second transmission part.

[0042] Figure 14 for Figure 13 A schematic diagram of the processing box from another perspective;

[0043] Figure 15 for Figure 13 A schematic diagram of the processing box from another perspective;

[0044] Figure 16 for Figure 10 Another schematic diagram of the interaction between the processing box and the force-applying component is shown, in which the force-applying component moves from the middle position to the first transient position;

[0045] Figure 17 for Figure 16 A schematic diagram of the processing box from another perspective;

[0046] Figure 18 for Figure 16 A schematic diagram of the processing box from another perspective;

[0047] Figure 19 for Figure 10 The diagram shows another interaction between the processing box and the force-applying component, where the force-applying component returns from the first transient position to the intermediate position;

[0048] Figure 20 for Figure 19 A schematic diagram of the processing box from another perspective;

[0049] Figure 21 Fig. 4 is a schematic view of the structure of the processing cartridge from another perspective; Figure 19 Fig. 5 is a schematic view of the structure of the processing cartridge from another perspective;

[0050] Figure 22 Fig. 6 is a schematic view of the structure of the processing cartridge from another perspective; Figure 10 Fig. 7 is a schematic view of the structure of the processing cartridge from another perspective;

[0051] Figure 23 Fig. 8 is a schematic view of the structure of the processing cartridge from another perspective; Figure 22 Fig. 9 is a schematic view of the structure of the processing cartridge from another perspective;

[0052] Figure 24 Fig. 10 is a schematic view of the structure of the processing cartridge from another perspective; Figure 22 Fig. 11 is a schematic view of the structure of the processing cartridge from another perspective;

[0053] Figure 25 Fig. 12 is a schematic view of the structure of the processing cartridge from another perspective; Figure 10 Fig. 13 is a schematic view of the structure of the processing cartridge from another perspective;

[0054] Figure 26 Fig. 14 is a schematic view of the structure of the processing cartridge from another perspective; Figure 25 Fig. 15 is a schematic view of the structure of the processing cartridge from another perspective;

[0055] Figure 27 Fig. 16 is a schematic view of the structure of the processing cartridge from another perspective; Figure 25 Fig. 17 is a schematic view of the structure of the processing cartridge from another perspective;

[0056] Figure 28 Fig. 18 is a schematic view of the structure of the processing cartridge from another perspective; Fig. 19 is a schematic view of the structure of the processing cartridge from another perspective;

[0057] Fig. 20 is a schematic view of the structure of the processing cartridge from another perspective; Figure 29 Fig. 21 is a schematic view of the structure of the processing cartridge from another perspective; Fig. 22 is a schematic view of the structure of the processing cartridge from another perspective;

[0058] Fig. 23 is a schematic view of the structure of the processing cartridge from another perspective; Fig. 24 is a schematic view of the structure of the processing cartridge from another perspective;

[0059] 100 - processing cartridge; 200 - force applying member; 200a - groove;

[0060] 10 - developing unit; 11 - first cartridge body; 112 - first end cover; 1121 - positioning column; 1122 - protruding column; 12 - developing roller; 121 - input shaft; 13 - driving force receiving member; 14 - powder discharge blade;

[0061] 20 - photosensitive unit; 21 - second cartridge body; 212 - second end cover; 212a - inclined stop surface; 212b - locking position; 22 - photosensitive drum; 23 - power receiving member;

[0062] 30 - switching mechanism; 31 - dial lever structure; 32 - moving lever; 32a - mounting hole; 321 - first connecting column; 33 - retainer; 33a - abutting slope; 33b - retaining surface; 33c - positioning hole; 331 - second connecting column; 34 - third elastic member;

[0063] 40 - deceleration mechanism; 41 - first transmission unit; 411 - first transmission part; 412 - second transmission part; 42 - second transmission unit; 421 - third transmission part; 422 - fourth transmission part; 423 - connecting shaft; 424 - abutting part; 43 - third transmission unit;

[0064] 50 - first elastic member; 60 - second elastic member. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0066] In the specific embodiments, various specific technical features described can be combined in any suitable manner without contradiction, for example, different embodiments and technical solutions can be formed by combining different specific technical features. In order to avoid unnecessary repetition, various possible combinations of various specific technical features in the present application are not described again.

[0067] In the following description, the terms "first\second\..." are only used to distinguish different objects, and do not mean that the objects have the same or related aspects. It should be understood that the terms "upper", "lower", "outer", "inner", "left", "right" are the positions in the normal use state, and the "left" and "right" directions shown in the specific corresponding schematic diagram can be the left and right directions in the normal use state or not.

[0068] It should be noted that the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitation, the element defined by the sentence "including one" does not exclude the existence of other identical elements in the process, method, article or device including the element. "Multiple" means greater than or equal to two.

[0069] Please refer to Figures 1 to 29The embodiment of the present application provides a processing box 100, which comprises a developing unit 10, a photosensitive unit 20 and a deceleration mechanism 40.

[0070] The processing box 100 is used in an imaging device, and the processing box 100 can convert data in a computer into a visible image and print the visible image on paper through a developing process.

[0071] The developing unit 10 comprises a first box body 11, a developing roller 12 and a driving force receiving member 13, the developing roller 12 is rotatably arranged in the first box body 11, the driving force receiving member 13 is used for receiving a driving force to drive the developing roller 12 to rotate, and the developing roller 12 comprises an input shaft 121.

[0072] The first box body 11 is used for containing a developer, and the developing roller 12 is used for carrying the developer, for example, refer to Figure 2 and Figure 11 The developing unit 10 further comprises a powder outlet knife 14, the powder outlet knife 14 is fixed to the first box body 11 and is in contact with the developing roller 12, so as to adjust the thickness of the developer on the surface of the developing roller 12.

[0073] The developer can be carbon powder.

[0074] The input shaft 121 is a part of the developing roller 12 for receiving the driving force, and the driving force received by the driving force receiving member 13 can be transmitted to the developing roller 12 through the input shaft 121, so as to drive the developing roller 12 to rotate.

[0075] It should be noted that the driving force receiving member 13 can receive the driving force from the imaging device or the photosensitive unit 20, for example, the driving force is received from a power receiving member 23 of the photosensitive unit 20, which is not limited herein.

[0076] For example, refer to Figure 2 and Figure 11 The developing unit 10 can comprise a first end cover 112, the first end cover 112 is fixedly connected with the first box body 11, the first end cover 112 is arranged on the opposite sides of the first box body 11 along the axial direction of the developing roller 12, and the developing roller 12 is directly or indirectly supported by the first box body. The driving force receiving member 13 can be exposed to the outer surface of the developing unit 10 through the first end cover 112, so as to receive the driving force.

[0077] The specific structure of the driving force receiving member 13 is not limited, for example, the driving force receiving member 13 can be a coupling.

[0078] The photosensitive unit 20 comprises a second box body 21 and a photosensitive drum 22, the developing unit 10 is arranged in the second box body 21, the photosensitive drum 22 is rotatably arranged in the second box body 21, and the developing roller 12 is used for supplying the developer to the photosensitive drum 22, so as to develop an electrostatic latent image on the photosensitive drum 22.

[0079] The second box body 21 is used to provide a containing space for the developing unit 10 and the photosensitive drum 22. When the developing unit 10 is arranged in the second box body 21, the developing roller 12 rotates with the photosensitive drum 22 in the developing state, and the developing roller 12 supplies the developing agent to the photosensitive drum 22 to develop the latent image on the photosensitive drum 22.

[0080] Exemplarily, referring to Figure 2 and Figure 11 , the photosensitive unit 20 can also include a power receiving member 23, which receives driving force from the image forming device to drive the photosensitive drum 22 to rotate. When the driving force receiving member 13 obtains driving force from the image forming device, the driving force received by the photosensitive drum 22 and the developing roller 12 can be from the same driving force source, i.e. the image forming device provides driving force for the photosensitive drum 22 and the developing roller 12 at the same time through one motor. When the driving force receiving member 13 obtains driving force from the photosensitive unit 20, the driving force can be obtained through the transmission cooperation with the power receiving member 23. At this time, it can be that only the photosensitive drum 22 obtains driving force from the image forming device.

[0081] The specific structure of the power receiving member 23 is not limited, and exemplarily, the power receiving member 23 can be a coupling.

[0082] Exemplarily, referring to Figure 2 and Figure 11 , the photosensitive unit 20 includes a second end cover 212, which is fixedly connected with the second box body 21, and the second end cover 212 is arranged at opposite sides of the second box body 21 along the axial direction of the photosensitive drum 22, and the photosensitive drum 22 is directly or indirectly supported by the second box body 21. The power receiving member 23 can be exposed to the outer surface of the photosensitive unit 20 through the second end cover 212 to receive driving force from the image forming device.

[0083] It can be understood that the structures of the two second end covers 212 can be different.

[0084] The developing unit 10 and the photosensitive unit 20 can be detachably connected or non-detachably connected, which is not limited herein.

[0085] It can be understood that after a long time of work, the photosensitive drum can be adhered with the developer which is not easy to remove and affects the imaging quality, and therefore, the photosensitive drum needs to be cleaned. When the cleaning program is executed, the process cartridge 100 needs to be switched from the developing state to the non-developing state, and the supply of the developer to the photosensitive drum by the developing roller is cut off, so as to reduce the case that the developing roller continuously supplies the developer to the photosensitive drum without cleaning effect. When the cleaning program is executed, only the photosensitive drum needs to rotate, and the developing roller does not need to rotate, but because the developing roller and the photosensitive drum share the same motor of the image forming device or the developing roller obtains the rotating driving force from the photosensitive drum, the developing roller still rotates and rubs against the powder outlet knife, and the surface of the developing roller is easy to be abraded, thereby reducing the service life of the developing roller.

[0086] Therefore, in the embodiment of the present application, the speed reduction mechanism 40 is arranged, and by arranging the speed reduction mechanism 40, the rotating speed of the developing roller 12 in the non-developing state is reduced, the abrasion amount of the surface of the developing roller 12 is reduced, and the service life of the developing roller 12 is prolonged.

[0087] The speed reduction mechanism 40 is arranged in the developing unit 10, and the speed reduction mechanism 40 includes the first transmission unit 41 and the second transmission unit 42 which are in transmission connection, the first transmission unit 41 is in transmission connection with the driving force receiving member 13, and the second transmission unit 42 is in transmission connection with the input shaft 121. The first transmission unit 41 includes the first transmission part 411 and the second transmission part 412 which are arranged side by side along the axial direction of the developing roller 12, and the rotating speed ratio of the second transmission part 412 to the second transmission unit 42 is greater than the rotating speed ratio of the first transmission part 411 to the second transmission unit 42.

[0088] In the developing state, the second transmission unit 42 is in transmission connection with the first transmission part 411, and in the non-developing state, the second transmission unit 42 can move relative to the first transmission unit 41 to be in transmission connection with the second transmission part 412.

[0089] It can be understood that the developing state refers to that the developer carried by the developing roller 12 reaches the surface of the photosensitive drum 22 under the action of the electric field force between the developing roller 12 and the photosensitive drum 22, so that the latent electrostatic image is developed. At this time, the developing roller 12 and the photosensitive drum 22 can be in mutual contact, or can be in the state of being close to each other with a predetermined gap, that is, the developing mode of the process cartridge 100 can be contact developing or jump developing. The non-developing state refers to the collective name of all states of the process cartridge 100 when it does not develop, and at this time, the electric field force between the developing roller 12 and the photosensitive drum 22 is no longer formed or is insufficient to force the developer carried by the developing roller 12 to reach the surface of the photosensitive drum 22.

[0090] It should be noted that the switching between the developing state and the non-developing state can be achieved by the switching mechanism 30 or by controlling the voltage of the surface of the developing roller 12, in which case the switching mechanism 30 is not required and is not limited herein. The driving force receiving member 13 is drivingly connected to the input shaft 121 via the speed reduction mechanism 40, which is arranged on the power transmission path between the driving force receiving member 13 and the input shaft 121. The driving force received by the driving force receiving member 13 from the image forming apparatus is transmitted to the input shaft 121 via the speed reduction mechanism 40, thereby driving the developing roller 12 to rotate.

[0091] The second transmission unit 42 can be drivingly connected to the first transmission part 411 or the second transmission part 412 to achieve the driving connection between the first transmission unit 41 and the second transmission unit 42.

[0092] It should be understood that when the speed ratio is greater than 1, the input speed is greater than the output speed, the torque increases but the speed decreases. Thus, when the speed ratio of the second transmission part 412 to the second transmission unit 42 is greater than the speed ratio of the first transmission part 411 to the second transmission unit 42, the speed of the developing roller 12 obtained when the second transmission unit 42 is drivingly connected to the second transmission part 412 is less than the speed obtained when the second transmission unit 42 is drivingly connected to the first transmission part 411.

[0093] Thus, in the developing state, the second transmission unit 42 is drivingly connected to the first transmission part 411, and the input shaft 121 has a relatively high speed, and in the non-developing state, the second transmission unit 42 is drivingly connected to the second transmission part 412, and the input shaft 121 has a relatively low speed, so as to achieve the speed reduction of the developing roller 12 from the developing state to the non-developing state.

[0094] It should be noted that the component of the second transmission unit 42 that is drivingly connected to the first transmission part 411 or the second transmission part 412 can be the same component or different components, which is not limited herein.

[0095] The movement of the second transmission unit 42 relative to the first transmission unit 41 can be sliding or a combination of sliding and rotation, which is not limited herein, as long as the second transmission unit 42 can be switched from the driving connection with the first transmission part 411 to the driving connection with the second transmission part 412.

[0096] The second transmission unit 42 can be driven by the switching force of the switching mechanism 30 to move to the driving connection with the second transmission part 412, or can be driven by other structures to move to the driving connection with the second transmission part 412, or can be a combination of the two, which is not limited herein.

[0097] The first transmission part 411 and the second transmission part 412 are arranged side by side along the axial direction of the developing roller 12, and the first transmission part 411 and the second transmission part 412 can have a gap or can have no gap along the axial direction, which is not limited herein. The relative position of the first transmission part 411 and the second transmission part 412 is not limited, and the first transmission part 411 can be arranged on the side of the second transmission part 412 close to the developing roller 12, or the second transmission part 412 can be arranged on the side of the first transmission part 411 close to the developing roller 12.

[0098] The processing cartridge 100 provided by the embodiment of the present application and the arrangement of the deceleration mechanism 40 can enable the developing roller 12 to have different rotating speeds in the developing state and the non-developing state. In the developing state, the developing roller 12 can rotate at a normal speed, and the developing reliability is not affected. When it is needed to switch to the non-developing state to clean the photosensitive drum 22, the second transmission unit 42 is switched from the transmission connection with the first transmission part 411 to the transmission connection with the second transmission part 412, the rotating speed ratio is increased, the rotating speed of the developing roller 12 is reduced, the wear amount of the surface of the developing roller 12 is reduced, and thus the service life of the developing roller 12 is prolonged. In this process, the rotation of the photosensitive drum 22 is not affected, the photosensitive drum 22 is conveniently cleaned, and the overall structural reliability of the processing cartridge 100 is high.

[0099] In some embodiments, referring to Figures 1 to 29 , the first transmission unit 41 is located on the side of the driving force receiving member 13 facing the first cartridge body 11.

[0100] In this embodiment, the position of the first transmission unit 41 relative to the driving force receiving member 13 is fixed in the developing state and the non-developing state, which is convenient for increasing the transmission stability. The state switching is realized by the movement of the second transmission unit 42 connected with the input shaft 121 relative to the first transmission unit 41, and the switching reliability is higher. Meanwhile, the first transmission unit 41 is closer to the first cartridge body 11, the transmission distance is reduced, and the structural compactness is increased.

[0101] The specific structure of the second transmission unit 42 is not limited.

[0102] In some embodiments, referring to Figure 2 , Figure 5 , Figure 7 , Figure 9 and Figure 11 , the first transmission part 411 and the second transmission part 412 are in abutting connection along the axial direction, the second transmission unit 42 includes a third transmission part 421, the third transmission part 421 is in transmission connection with the first transmission part 411 in the developing state, the third transmission part 421 is separated from the first transmission part 411 in the non-developing state, and the third transmission part 421 moves relative to the first transmission part 411 to be in transmission connection with the second transmission part 412.

[0103] That is, no matter in the developing state or the non-developing state, the second transmission unit 42 is in transmission connection with the first transmission unit 41 through the third transmission part 421.

[0104] The rotation speed ratio of the second transmission part 412 to the third transmission part 421 is greater than that of the first transmission part 411 to the third transmission part 421.

[0105] In this embodiment, the second transmission unit 42 is simple in structure, and only needs to be in transmission connection with the first transmission part 411 or the second transmission part 412 through the third transmission part 421 to change the rotation speed of the developing roller 12, and the overall structure of the process cartridge 100 is simpler, and the first transmission part 411 and the second transmission part 412 are arranged more closely, which can reduce the space occupied by the first transmission unit 41.

[0106] In other embodiments, please refer to Figure 28 and Figure 29 , the first transmission part 411 and the second transmission part 412 are arranged in axial spacing, and the second transmission unit 42 includes the third transmission part 421 and the fourth transmission part 422 arranged side by side along the axial direction of the developing roller 12, in the developing state, the third transmission part 421 is in transmission connection with the first transmission part 411, and the fourth transmission part 422 is separated from the first transmission part 411 and the second transmission part 412; in the non-developing state, the fourth transmission part 422 is in transmission connection with the second transmission part 412, and the third transmission part 421 is separated from the first transmission part 411 and the second transmission part 412.

[0107] The rotation speed ratio of the second transmission part 412 to the fourth transmission part 422 is greater than that of the first transmission part 411 to the third transmission part 421.

[0108] In the developing state, the third transmission part 421 is in transmission connection with the first transmission part 411, and the fourth transmission part 422 is separated from the first transmission part 411 and the second transmission part 412, that is, in the developing state, only the third transmission part 421 of the second transmission unit 42 has a transmission relationship with the first transmission part 411, and the fourth transmission part 422 does not affect the first transmission part 411 and the second transmission part 412, at this time, the fourth transmission part 422 can be located in the axial gap range between the first transmission part 411 and the second transmission part 412.

[0109] In the non-development state, the fourth transmission part 422 is in transmission connection with the second transmission part 412, and the third transmission part 421 is separated from the first transmission part 411 and the second transmission part 412, that is, in the non-development state, the second transmission unit 42 only has the transmission relationship between the fourth transmission part 422 and the second transmission part 412, and the third transmission part 421 and the first transmission part 411 and the second transmission part 412 do not affect each other, at this time, the third transmission part 421 can be located in the gap range of the first transmission part 411 and the second transmission part 412 along the axial direction.

[0110] In this embodiment, the third transmission part 421 and the fourth transmission part 422 are provided, which can increase the structural strength of the second transmission unit 42, in the development state, the third transmission part 421 is in transmission connection with the first transmission part 411, and in the non-development state, the fourth transmission part 422 is in transmission connection with the second transmission part 412, which reduces the damage of the second transmission unit 42 and makes the transmission more reliable, of course, it can also increase the adjustability of the rotational speed of the input shaft 121. The first transmission part 411 and the second transmission part 412 are arranged in a spaced manner, which can also reduce the probability of mutual interference.

[0111] In some embodiments, the first transmission part 411 is a full-tooth gear structure, and the second transmission part 412 is a full-tooth gear structure or a toothless gear structure.

[0112] It can be understood that the full-tooth gear means that the teeth on the gear are uniformly distributed in the circumference, and there is no missing tooth or few teeth, and when two full-tooth gears are engaged, continuous and smooth transmission can be achieved.

[0113] The toothless gear means that the gear is provided with missing tooth positions, and when the toothless gear is engaged with the full-tooth gear, the toothless gear can realize triggering or periodic action at a specific position, and only when the teeth on the toothless gear cooperate with the second transmission unit 42, the second transmission unit 42 can rotate the teeth on the toothless gear by an angle, so as to reduce the speed ratio.

[0114] That is, in the non-development state, the driving force transmitted to the second transmission unit 42 through the second transmission part 412 can be continuous or intermittent, so as to reduce the rotational speed of the developing roller 12.

[0115] It can be understood that the first transmission part 411 and the second transmission part 412 can be a straight gear structure or a helical gear structure, which is not limited here. The shape of the teeth of the first transmission part 411 and the second transmission part 412 is also not limited, and can be triangular, trapezoidal or other shapes that can be transmitted.

[0116] In this embodiment, the first transmission part 411 and the second transmission part 412 are formed as gear structures, which are simple in structure, convenient and stable in transmission, and low in production cost. When the first transmission part 411 and the second transmission part 412 are both full-tooth gear structures, continuous and stable transmission can be provided in both the developing state and the non-developing state. Thus, the number of teeth of the first transmission part 411 and the second transmission part 412 can be set so that the speed ratio of the second transmission part 412 to the second transmission unit 42 is greater than the speed ratio of the first transmission part 411 to the second transmission unit 42. When the first transmission part 411 is a full-tooth gear and the second transmission part 412 is a missing-tooth gear, intermittent transmission is provided in the non-developing state to reduce the speed of the developing roller 12.

[0117] In some embodiments, the third transmission part 421 is a full-tooth gear structure, and the fourth transmission part 422 is a full-tooth gear structure.

[0118] It can be understood that the third transmission part 421 and the fourth transmission part 422 can be straight gear structures or helical gear structures, which are not limited herein. The shape of the teeth of the third transmission part 421 and the fourth transmission part 422 is also not limited, and can be triangular, trapezoidal, or any other shape that can be transmitted.

[0119] In this embodiment, the third transmission part 421 and the fourth transmission part 422 are formed as gear structures, which are simple in structure, convenient and stable in transmission, and low in production cost.

[0120] For example, in the embodiment in which the second transmission unit 42 includes the third transmission part 421 and the fourth transmission part 422, as shown in Figure 5 and Figure 11 , the first transmission part 411, the second transmission part 412, the third transmission part 421, and the fourth transmission part 422 can all be full-tooth gear structures.

[0121] In the embodiment in which the second transmission unit 42 includes the third transmission part 421 and the fourth transmission part 422, as shown in Figure 28 and Figure 29 , the first transmission part 411, the second transmission part 412, the third transmission part 421, and the fourth transmission part 422 can all be full-tooth gear structures.

[0122] At this time, the speed ratio of the first transmission part 411 to the second transmission unit 42 is the speed ratio of the first transmission part 411 to the third transmission part 421, and the speed ratio of the second transmission part 412 to the second transmission unit 42 is the speed ratio of the second transmission part 412 to the fourth transmission part 422.

[0123] The rotation speed ratio of the first transmission part 411 to the third transmission part 421 is inversely proportional to the number of teeth of the first transmission part 411 and the third transmission part 421; the rotation speed ratio of the second transmission part 412 to the fourth transmission part 422 is inversely proportional to the number of teeth of the second transmission part 412 and the fourth transmission part 422. The number of teeth of the first transmission part 411, the second transmission part 412, the third transmission part 421 and the fourth transmission part 422 can be set so that the rotation speed of the developing roller 12 in the non-developing state is lower than that in the developing state.

[0124] Exemplarily, the number of teeth of the first transmission part 411 is 39, the number of teeth of the second transmission part 412 is 25, the number of teeth of the third transmission part 421 is 17, and the number of teeth of the fourth transmission part 422 is 31.

[0125] The rotation speed ratio of the first transmission part 411 to the third transmission part 421 is 17:39, and the rotation speed ratio of the second transmission part 412 to the fourth transmission part 422 is 31:25. In this way, the rotation speed ratio of the second transmission part 412 to the fourth transmission part 422 is greater than the rotation speed ratio of the first transmission part 411 to the third transmission part 421, and the speed of the developing roller 12 in the non-developing state is lower.

[0126] In some embodiments, referring to Figure 2 and Figure 11 , the process cartridge 100 comprises a first elastic member 50, the first elastic member 50 is sleeved on the outer periphery of the input shaft 121 and abuts between the second transmission unit 42 and the first cartridge body 11, and the first elastic member 50 is used to switch the second transmission unit 42 between the transmission connection with the first transmission part 411 and the transmission connection with the second transmission part 412.

[0127] It can be understood that the relative positions of the first transmission part 411 and the second transmission part 412 are not limited, and the first transmission part 411 can be arranged on the side of the second transmission part 412 close to the developing roller 12, or the second transmission part 412 can be arranged on the side of the first transmission part 411 close to the developing roller 12.

[0128] Exemplarily, referring to Figure 2 , Figures 6 to 9In the second transmission part 412 is arranged on the side of the first transmission part 411 close to the developing roller 12, in the non-developing state, the second transmission unit 42 can move relative to the first transmission unit 41 to the direction close to the developing roller 12, to switch from the transmission connection with the first transmission part 411 to the transmission connection with the second transmission part 412, at this time, the first elastic member 50 is elastically deformed; in the developing state, the first elastic member 50 releases the elastic potential energy, and makes the second transmission unit 42 move relative to the first transmission unit 41 to the direction away from the developing roller 12, to switch from the transmission connection with the second transmission part 412 to the transmission connection with the first transmission part 411. At this time, the first elastic member 50 is used to reset the second transmission unit 42 to the position of the transmission connection with the first transmission part 411 in the process of switching from the non-developing state to the developing state. In this case, in the developing state, the first elastic member 50 is in a natural state and does not deform, and only accumulates elastic potential energy when switching to the non-developing state. Thus, the deformation time of the first elastic member 50 can be reduced, and the service life of the first elastic member 50 can be prolonged.

[0129] For example, refer to Figure 11 In the first transmission part 411 is arranged on the side of the second transmission part 412 close to the developing roller 12, in the developing state, the second transmission unit 42 abuts against the first transmission part 411, at this time, the first elastic member 50 is elastically deformed under pressure, in the non-developing state, the first elastic member 50 releases the elastic potential energy, and makes the second transmission unit 42 move relative to the first transmission unit 41 to the direction away from the developing roller 12, to switch from the transmission connection with the first transmission part 411 to the transmission connection with the second transmission part 412. At this time, the first elastic member 50 is used to reset the second transmission unit 42 to the position of the transmission connection with the second transmission part 412 in the process of switching from the developing state to the non-developing state. In this embodiment, in the non-developing state, the first elastic member 50 is in a natural state and does not deform, and the first elastic member 50 can make the second transmission unit 42 remain in the transmission connection position with the second transmission part 412 in the non-developing state, thereby increasing the transmission stability in the non-developing state.

[0130] In this embodiment, the arrangement of the first elastic member 50 can make the second transmission unit 42 switch between the transmission connection with the first transmission part 411 and the transmission connection with the second transmission part 412, that is, the arrangement position of the first transmission part 411 and the second transmission part 412 will not be too limited, thereby increasing the assembly convenience, and the first elastic member 50 can also make the second transmission unit 42 stably remain in the transmission connection position with the first transmission part 411 or remain in the transmission connection position with the second transmission part 412, thereby increasing the structural reliability of the process cartridge 100.

[0131] The specific structure of the first elastic member 50 is not limited, for example, refer to Figure 2and Figure 11 The first elastic member 50 can be a spring.

[0132] The first elastic member 50 is sleeved on the input shaft 121, and the input shaft 121 can also provide structural support for the first elastic member 50, thereby reducing the probability of the first elastic member 50 coming off.

[0133] It can be understood that in other embodiments, the first elastic member 50 can also abut between the second transmission unit 42 and the first end cover 112.

[0134] In some embodiments, referring to Figures 1 to 9 The first box body 11 can move relative to the second box body 21, and in the developing state, the developing roller 12 is in contact with the photosensitive drum 22, and in the non-developing state, the first box body 11 can drive the developing roller 12 to move relative to the photosensitive drum 22 to separate from the photosensitive drum 22.

[0135] That is, in the switching process from the developing state to the non-developing state, the developing roller 12 and the photosensitive drum 22 will move relatively, and the developing roller 12 will switch from the state of being in contact with the photosensitive drum 22 to the state of being separated from the photosensitive drum 22. In this case, the whole developing unit 10 can move relative to the photosensitive drum 22, the movement mode is simple, and the relative movement between the components of the developing unit 10 will not occur.

[0136] The relative movement mode of the first box body 11 and the second box body 21 can be rotation, translation, or superposition of rotation and translation, which is not limited here.

[0137] In other embodiments, referring to Figures 10 to 27 The first box body 11 and the second box body 21 do not move relative to each other, and in the developing state and the non-developing state, the developing roller 12 and the photosensitive drum 22 remain in contact.

[0138] That is, in the switching process from the developing state to the non-developing state, the developing unit 10 and the photosensitive drum 22 will not move relatively, and the developing roller 12 and the photosensitive drum 22 always remain in contact, without the need to change the relative position of the developing roller 12 and the photosensitive drum 22. The structure of the process cartridge 100 can be relatively simple, and only the position switching of the second transmission unit 42 needs to be completed. At this time, the voltage of the developing roller 12 or the like can be controlled to prevent the photosensitive drum 22 from adsorbing the developer when the cleaning program is executed.

[0139] In some embodiments, the process cartridge 100 includes a switching mechanism 30, which is operably connected to the developing unit 10 and configured to receive a switching force from the image forming device, and the second transmission unit 42 is configured to move relative to the first transmission unit 41 under the action of the switching force.

[0140] It should be noted that here, the switching force is a collective term for the acting forces received by the switching mechanism 30 from the image forming device.

[0141] The manner in which the switching mechanism 30 cooperates with the developing unit 10 is not limited, and can be a rotary connection, a fixed connection, etc., which is not limited here.

[0142] The switching mechanism 30 can drive the second transmission unit 42 to move relative to the first transmission unit 41. Here, it can be that the switching mechanism 30 drives the second transmission unit 42 to switch from a position of transmission connection with the first transmission part 411 to a position of transmission connection with the second transmission part 412, and the first elastic member 50 drives the second transmission unit 42 to switch from the position of transmission connection with the second transmission part 412 to the position of transmission connection with the first transmission part 411. Alternatively, it can be that the switching mechanism 30 drives the second transmission unit 42 to switch from the position of transmission connection with the first transmission part 411 to the position of transmission connection with the second transmission part 412, and the first elastic member 50 drives the second transmission unit 42 to switch from the position of transmission connection with the second transmission part 412 to the position of transmission connection with the first transmission part 411, which is not limited here.

[0143] In some embodiments, referring to Figures 1 to 9 , the switching mechanism 30 can swing under the action of the switching force, and the switching mechanism 30 is fixedly connected with the first cartridge body 11. In this case, the switching mechanism 30 can drive the first cartridge body 11 to swing and in turn drive the developing roller 12 to swing relative to the photosensitive unit 20, so as to switch the developing roller 12 and the photosensitive drum 22 from a state of mutual contact to a state of mutual separation.

[0144] The specific structure of the switching mechanism 30 is not limited, and exemplarily, referring to Figure 1 and Figure 2 , the structure of the switching mechanism 30 for receiving the switching force can be formed as a lever structure 31, and the lever structure 31 is exposed on the outer surface of the process cartridge 100 to receive the switching force from the image forming device.

[0145] Referring to Figure 2 , the second transmission unit 42 includes a connecting shaft 423 and an abutting part 424, one end of the connecting shaft 423 is provided with a connecting hole, and the input shaft 121 of the developing roller 12 cooperates with the connecting hole, and the abutting part 424 protrudes from the one end of the connecting shaft 423 away from the connecting hole in the axial direction.

[0146] Exemplarily, referring to Figure 28 and Figure 29 , the third transmission part 421 and the fourth transmission part 422 can be sleeved on the outer periphery of the connecting shaft 423.

[0147] The second transmission unit 42 is connected with the input shaft 121 through the connecting hole, so as to be driven to rotate by the input shaft 121.

[0148] The shape of the connecting hole is adapted to the cross section of the input shaft 121, and the connecting hole can be a semicircular hole, a square hole or other special-shaped hole. Exemplarily, the connecting hole is a D-shaped hole.

[0149] Referring to Figure 3 , Figures 6 to 9 , the second box body 21 is formed with an inclined stop surface 212a on one side wall in the axial direction, which extends away from the photosensitive drum 22 from the top side to the bottom side, the abutting portion 424 is separably abutted with the inclined stop surface 212a in the axial direction, the abutting portion 424 can be abutted with the inclined stop surface 212a under the action of the switching force, and is moved relative to the first box body 11 and the first transmission unit 41 under the action of the switching force and the abutting force of the abutting inclined surface 33a.

[0150] In this embodiment, the switching force received by the switching mechanism 30 can not only realize the transmission switching of the second transmission unit 42, but also realize the separation of the developing roller 12 and the photosensitive drum 22, and the processing cartridge 100 is switched from the developing state to the non-developing state through the switching mechanism 30.

[0151] Exemplarily, referring to Figure 3 , Figures 6 to 9When the second transmission part 412 is arranged on the side of the first transmission part 411 close to the developing roller 12, in the developing state, the second transmission unit 42 is in abutting engagement with the first transmission part 411, at this time, the first elastic member 50 is in a natural state, the abutting part 424 is separated from the inclined stop surface 212a, at this time, no abutting force is generated between the two; when it is needed to switch to the non-developing state, the switching mechanism 30 drives the first cartridge 11 and the speed reduction mechanism 40 to move under the action of the switching force, the distance between the abutting part 424 and the inclined stop surface 212a is reduced, at this time, the second transmission unit 42 moves with the first cartridge 11, the second transmission unit 42 is still in transmission connection with the first transmission part 411; when the abutting part 424 abuts against the inclined stop surface 212a, the inclined stop surface 212a forms a stop to the abutting part 424, thereby, under the cooperation of the switching force and the abutting force of the abutting part 424 and the inclined stop surface 212a, the second transmission unit 42 moves relative to the first cartridge 11 and the first transmission unit 41 in the direction close to the developing roller 12, so that the second transmission unit 42 is switched to be in transmission connection with the second transmission part 412, and is kept in the non-developing state under the abutment of the inclined stop surface 212a, the first elastic member 50 is deformed. After the cleaning program is completed, the developing unit 10 can move reversely to the position where the developing roller 12 cooperates with the photosensitive drum 22 under the action of the reverse switching force or the second elastic member 60 described below, at this time, the abutting part 424 is no longer in abutment with the inclined stop surface 212a, the first elastic member 50 can release the elastic deformation, drive the second transmission unit 42 to move away from the developing roller 12 to be in transmission connection with the first transmission part 411, so as to be switched to the developing state.

[0152] Of course, when the second transmission part 412 is arranged on the side of the first transmission part 411 away from the developing roller 12, in the developing state, the first elastic member 50 is in a force-deformed state, the abutting part 424 is in abutment with the inclined stop surface 212a; in the non-developing state, the abutting part 424 is separated from the inclined stop surface 212a, the first elastic member 50 releases the elastic potential energy, which is contrary to the above-mentioned case, and will not be described here.

[0153] In this embodiment, the separation and cooperation of the abutting part 424 and the inclined stop surface 212a enable the second transmission unit 42 to realize transmission switching with the first transmission part 411 and the second transmission part 412 under the action of the switching force, the docking mode is simple, and the inclined stop surface 212a can also provide guiding support for the movement of the second transmission unit 42, thereby increasing the movement reliability.

[0154] In this embodiment, the switching force received by the switching mechanism 30 can be a continuous force.

[0155] In some embodiments, please refer to Figure 2 and Figure 11The processing cartridge 100 comprises a second elastic member 60, one end of the second elastic member 60 is connected with the first cartridge body 11, and the other end is connected with the second cartridge body 21, the second elastic member 60 is used to drive the first cartridge body 11 to move the developing roller 12 and the speed reduction mechanism 40 relative to the second cartridge body 21 to contact the developing roller 12 with the photosensitive drum 22 after the switching force is removed.

[0156] In this embodiment, in the non-development state, the second elastic member 60 accumulates elastic potential energy, when switching to the development state, the switching force is removed, the second elastic member 60 releases the elastic potential energy, drives the first cartridge body 11 to move the developing roller 12 and the second transmission unit 42, so that the developing roller 12 is restored from the state of being separated from the photosensitive drum 22 to the state of being in contact with the photosensitive drum 22, and the relative movement between the abutting portion 424 and the inclined stop surface 212a occurs, the relative position between the abutting portion 424 and the inclined stop surface 212a is changed, so as to facilitate the second transmission unit 42 to move to the transmission connection with the second transmission portion 412 under the abutting force or the elastic force of the first elastic member 50.

[0157] In this embodiment, the second elastic member 60 can make the whole developing unit 10 move to restore to the development state after the switching force is removed, without the need of additional force, the reset is convenient, and the developing roller 12 can be restored to the state of being in contact with the photosensitive drum 22, and the structure of the processing cartridge 100 is more reliable.

[0158] The specific structure of the second elastic member 60 is not limited, and exemplarily, the second elastic member 60 can be a spring.

[0159] In other embodiments, please refer to Figure 10 and Figure 11 The switching mechanism 30 comprises a moving rod 32 and a retaining member 33, one end of the moving rod 32 is rotationally connected with the first cartridge body 11, and the other end is used to receive the switching force from the image forming device, the retaining member 33 is rotationally connected with the first cartridge body 11 and connected with the moving rod 32, the retaining member 33 has an abutting inclined surface 33a, the abutting portion 424 is axially separably abutted with the abutting inclined surface 33a, and the abutting portion 424 can move relative to the first cartridge body 11 and the first transmission unit 41 under the switching force and the abutting force of the abutting inclined surface 33a.

[0160] The moving rod 32 can move relative to the first cartridge body 11 under the switching force of the image forming device. The retaining member 33 is rotationally connected with the first cartridge body 11 and connected with the moving rod 32, that is, the moving rod 32 can drive the retaining member 33 to move relative to the first cartridge body 11.

[0161] In this embodiment, the switching mechanism 30 receives the switching force from the image forming device, which only causes the second transmission unit 42 to change transmission, without causing the first cartridge body 11 and the developing roller 12 to move, and the developing roller 12 remains in contact with the photosensitive drum 22. At this time, the process cartridge 100 does not switch between the developing state and the non-developing state by the switching mechanism 30, and can switch to the non-developing state by controlling the voltage of the developing roller 12.

[0162] In the embodiment in which the first transmission part 411 is arranged on the side of the second transmission part 412 facing the developing roller 12, please refer to Figures 10 to 27 In the developing state, the second transmission unit 42 is in transmission connection with the first transmission part 411, the first elastic member 50 is deformed under pressure, the abutting part 424 abuts against the abutting inclined surface 33a, and the second transmission unit 42 is kept in the position in transmission connection with the first transmission part 411. In the non-developing state, the moving rod 32 receives the switching force, and drives the retaining member 33 to rotate relative to the first cartridge body 11 under the action of the switching force, so that the abutting part 424 gradually separates from the abutting inclined surface 33a. After the abutting part 424 separates from the abutting inclined surface 33a, the first elastic member 50 releases the deformation, so that the second transmission unit 42 separates from the first transmission part 411 and moves to the direction away from the developing roller 12 to be in transmission connection with the second transmission part 412. After the cleaning program is completed, the process cartridge 100 switches to the developing state, the moving rod 32 and the retaining member 33 rotate reversely relative to the first cartridge body 11, so that the abutting inclined surface 33a gradually abuts against the abutting part 424, thereby driving the second transmission unit 42 to move to the direction close to the developing roller 12 under the abutting force, so that the second transmission unit 42 separates from the second transmission part 412 and is in transmission connection with the first transmission part 411, and the first elastic member 50 is deformed.

[0163] In the embodiment in which the second transmission part 412 is arranged on the side of the first transmission part 411 facing the developing roller 12, in the developing state, the first elastic member 50 is in a natural state, and the abutting part 424 is arranged separately from the abutting inclined surface 33a. In the non-developing state, the first elastic member 50 is deformed, and the abutting part 424 abuts against the abutting inclined surface 33a. Contrary to the above, this will not be described in detail.

[0164] In this embodiment, in the switching process between the developing state and the non-developing state, the first cartridge body 11 and the developing roller 12 do not need to move, and can remain in the current state. Only the movement of the moving rod 32, the retaining member 33 and the second transmission unit 42 is needed to realize the transmission switching of the second transmission unit 42, the switching is simpler, and the restriction on the developing unit 10 is reduced. The abutting mode of the abutting part 424 and the abutting inclined surface 33a is simple, and does not need to arrange a complex structure.

[0165] The rotating connection mode of the moving rod 32 and the first cartridge body 11 is not limited. Exemplarily, please refer toFigures 10 to 12 The moving rod 32 is provided with a mounting hole 32a, and the first end cover 112 is provided with a positioning post 1121 on the side facing the first box 11. The mounting hole 32a and the positioning post 1121 can be rotatably engaged to realize the rotational connection between the moving rod 32 and the first box 11.

[0166] The rotational connection between the retainer 33 and the first housing 11 is not limited. For example, please refer to... Figures 10 to 12 The retainer 33 is provided with a positioning hole 33c, and the first end cover 112 is provided with a protrusion 1122 on the side opposite to the first box body 11. The positioning hole 33c and the protrusion 1122 can be rotatably engaged to realize the rotational connection between the retainer 33 and the first box body 11.

[0167] The connection method between the moving rod 32 and the retainer 33 is not limited; for example, it can be a snap-fit ​​connection.

[0168] The surface of the abutting part 424 that mates with the abutting inclined surface 33a can be a straight surface or a conical surface, and there is no limitation on it.

[0169] In some embodiments, please refer to Figures 13 to 27 The retainer 33 is provided with a retaining surface 33b, and the second box 21 has a fastener 212b formed on one side wall along the axial direction. When the abutting part 424 separates from the abutting inclined surface 33a, the retaining surface 33b separates from the fastener 212b. When the abutting part 424 abuts against the abutting inclined surface 33a, the retaining surface 33b engages with the fastener 212b.

[0170] When the abutting part 424 separates from the abutting inclined surface 33a, the retaining surface 33b separates from the latch 212b, which allows the retaining member 33 to be in a free state, making it easier to switch the force to drive the moving rod 32 and thus drive the retaining member 33 to rotate; when the abutting part 424 abuts against the abutting inclined surface 33a, the retaining surface 33b cooperates with the latch 212b, which allows the retaining member 33 to be stably held in the current position, thereby allowing the second transmission unit 42 to be stably held in the current transmission position, increasing the positional stability of the processing box 100.

[0171] Exemplarily, in the embodiment that the first transmission part 411 is arranged on the side of the second transmission part 412 facing the developing roller 12, in the developing state, the second transmission unit 42 is in transmission connection with the first transmission part 411, the abutting part 424 abuts against the abutting inclined surface 33a, at this time, the retaining surface 33b cooperates with the buckling position 212b, the buckling position 212b stably retains the retaining member 33 in the current position, so that the retaining member 33 does not affect the second transmission unit 42, and the second transmission unit 42 can be stably retained in the developing state; in the non-developing state, the moving rod 32 receives the switching force, and drives the retaining member 33 to rotate relative to the first box body 11 under the action of the switching force, so that the abutting part 424 gradually separates from the abutting inclined surface 33a, and the retaining surface 33b gradually separates from the buckling position 212b, and the retaining member 33 is in a free state, facilitating smooth movement next time.

[0172] In some embodiments, referring to Figure 11 and Figure 12 , the switching mechanism 30 further comprises a third elastic member 34, one end of the third elastic member 34 is connected with the moving member, and the other end is connected with the moving rod 32, and the third elastic member 34 is used to drive the moving rod 32 to move relative to the retaining member 33 after the switching force is removed.

[0173] In this embodiment, after the moving rod 32 drives the retaining member 33 to move, the moving rod 32 can also move relative to the retaining member 33 after the switching force is removed, at this time, the moving rod 32 can move relative to the retaining member 33 to the position before being driven, facilitating the switching force to act on the same position next time, and increasing the action reliability.

[0174] Exemplarily, referring to Figures 10 to 27 , in the embodiment that the first transmission part 411 is arranged on the side of the second transmission part 412 facing the developing roller 12, in the non-developing state, the moving rod 32 receives the switching force, and drives the retaining member 33 to rotate relative to the first box body 11 under the action of the switching force, so that the abutting part 424 gradually separates from the abutting inclined surface 33a, and the buckling position 212b cooperates with the retaining surface 33b, under the action of the buckling position 212b, the retaining member 33 is retained in the current position, the third elastic member 34 releases the elastic deformation, and the moving member moves relative to the retaining member 33 to the position before being driven, after the cleaning program is executed, the process cartridge 100 is switched to the developing state, the switching mechanism 30 receives the reverse switching force, drives the moving member to drive the retaining member 33 to rotate reversely, so that the retaining member 33 rotates to the position before being driven, the abutting part 424 abuts against the abutting inclined surface 33a, the moving member moves relative to the retaining member 33 by a certain range, and the third elastic member 34 drives the moving member to return to the position before being driven again after the switching force is removed, in this way, the relative position of the moving member and the retaining member 33 is returned, so as to facilitate the next operation.

[0175] In this embodiment, the switching force received by the switching mechanism 30 can be a transient force.

[0176] The specific configuration of the third elastic member 34 is not limited, and the third elastic member 34 can be a spring, for example.

[0177] For example, referring to Figure 11 , the moving rod 32 can be provided with a first connecting column 321, the retaining member 33 is provided with a second connecting column 331, one end of the third elastic member 34 is matched with the first connecting column 321, and the other end is matched with the second connecting column 331.

[0178] For example, the imaging device includes a housing, a force applying member 200, and the process cartridge 100 of any of the embodiments of the present application, the process cartridge 100 is detachably arranged in the housing, and the force applying member 200 is used to apply a switching force to the switching mechanism 30.

[0179] The imaging device refers to a device that uses an electrophotographic imaging method to form an image on a recording material. The imaging device can be a copier, a fax machine, a printer (laser beam printer, LED printer, etc.), and a corresponding multifunction printer, etc.

[0180] For example, referring to Figure 13 and Figure 16 , the force applying member 200 is provided with a groove 200a, and the groove 200a is matched with the switching mechanism 30, and the groove 200a is matched with the moving rod 32, for example.

[0181] The force applied by the force applying member 200 can be a continuous force or a transient force, which is not limited here.

[0182] For example, in some embodiments, the switching force applied by the force applying member 200 is a continuous force.

[0183] In the embodiment in which the switching mechanism 30 is fixedly connected with the first cartridge body 11, in the developing state, referring to Figure 6 and Figure 7 , the force applying member 200 is in the first position, at this time, the force applying member 200 is separated from the lever structure 31, that is, the force applying member 200 does not apply a force to the lever structure 31, when it is needed to switch from the developing state to the non-developing state, the force applying member 200 moves from the first position to the second position, referring to Figure 8 and Figure 9At this time, the force applying member 200 contacts the lever structure 31, and a switching force is applied to the lever structure 31, which drives the switching mechanism 30, the developing unit 10 and the speed reduction mechanism 40 to move, and the transmission of the second transmission unit 42 is switched under the action of the abutting portion 424 and the inclined stop surface 212a; in the non-developing state, the force applying member 200 remains in the second position, and the switching force is continuously applied to the lever structure 31, so that the switching mechanism 30 and the second transmission unit 42 remain in the current position; when it is needed to return to the developing state, the force applying member 200 returns to the first position, and the switching force applied to the switching mechanism 30 is removed, at this time, the second elastic member 60 releases the elastic deformation, so that the switching mechanism 30 drives the first box body 11 to return to the position where the developing roller 12 cooperates with the photosensitive drum 22, so that the switching between the developing state and the non-developing state is realized.

[0184] Exemplarily, in some embodiments, the switching force applied by the force applying member 200 is a transient force.

[0185] In the embodiment in which the switching mechanism 30 is rotationally connected to the first box body 11 through the moving rod 32 and the retaining member 33, the force applying member 200 has an intermediate position, in which the force applying member 200 does not apply a force to the switching mechanism 30.

[0186] Please refer to Figures 13 to 15 When the process cartridge 100 is just installed in the image forming apparatus, the force applying member 200 is in the intermediate position, and the end of the moving rod 32 away from the retaining member 33 is pressed down, at this time, the retaining surface 33b of the retaining member 33 is separated from the buckle 212b, the abutting portion 424 is separated from the abutting inclined surface 33a, the second transmission unit 42 is in the position of transmission connection with the second transmission portion 412, and the first elastic member 50 is in the natural state.

[0187] Please refer to Figures 16 to 18 In the developing state, the force applying member 200 moves from the intermediate position to the first transient position in the direction shown to the left, contacts the moving rod 32, and applies a switching force to the moving rod 32, so that the moving rod 32 drives the retaining member 33 to rotate, at this time, the retaining surface 33b cooperates with the buckle 212b, so that the retaining member 33 is retained in the current position, and the abutting portion 424 moves under the action of the abutting inclined surface 33a, so that the second transmission unit 42 is in transmission connection with the first transmission portion 411.

[0188] Please refer to Figures 19 to 21 After the second transmission unit 42 is in transmission connection with the first transmission portion 411, the force applying member 200 returns to the intermediate position from the first transient position, and the switching force applied by the force applying member 200 to the switching mechanism 30 is removed, at this time, the retaining member 33 is retained in the current position under the cooperation of the buckle 212b and the retaining surface 33b, and the moving rod 32 returns to the position before being driven by the force applying member 200 under the drive of the third elastic member 34. At this time, the process cartridge 100 can normally develop.

[0189] Please refer to Figures 22 to 24 In the non-development state, the force applying member 200 moves from the intermediate position to the second transient position in the direction shown to the right, contacts the moving rod 32, and applies a reverse switching force to the moving rod 32, so that the moving rod 32 drives the retaining member 33 to rotate, the retaining surface 33b of the retaining member 33 is disengaged from the buckle 212b, and the abutting surface 33a no longer abuts against the abutting portion 424, and the first elastic member 50 restores the elastic deformation, and drives the second transmission unit 42 to move away from the developing roller 12 to the transmission connection with the second transmission portion 412.

[0190] Please refer to Figures 25 to 27 After the second transmission unit 42 is in transmission connection with the second transmission portion 412, the force applying member 200 returns from the second transient position to the intermediate position, the switching force of the force applying member 200 to the switching mechanism 30 is removed, the retaining member 33 is stationary, and the moving rod 32 returns to the position before being driven by the force applying member 200 under the drive of the third elastic member 34. At this time, the process cartridge 100 can normally perform the cleaning work.

[0191] It can be understood that the switching mechanism 30 can also be other forms of structure, as long as the second transmission unit 42 can complete the transmission switching, which is not limited herein.

[0192] It can be understood that, please refer to Figure 5 and Figure 28 The speed reduction mechanism 40 can also be provided with a third transmission unit 43 to cooperate with other structures in transmission, and the third transmission unit 43 can be a gear structure.

[0193] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any embodiment or example in a suitable manner. In addition, the different embodiments or examples described in the present application and the features of the different embodiments or examples can be combined by those skilled in the art without contradiction.

[0194] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A process cartridge, characterized by, The application relates to an image forming device, comprising: a developing unit, comprising a first box body, a developing roller rotatably arranged in the first box body, and a driving force receiving member for receiving a driving force to drive the developing roller to rotate, the developing roller comprising an input shaft; a photosensitive unit, comprising a second box body and a photosensitive drum rotatably arranged in the second box body, the developing unit being arranged in the second box body, the developing roller being used to supply a developing agent to the photosensitive drum to develop an electrostatic latent image on the photosensitive drum; a speed reduction mechanism arranged in the developing unit, the speed reduction mechanism comprising a first transmission unit and a second transmission unit in transmission connection, the first transmission unit being in transmission connection with the driving force receiving member, the second transmission unit being in transmission connection with the input shaft, the first transmission unit comprising a first transmission part and a second transmission part arranged side by side along the axial direction of the developing roller, the speed reduction ratio of the second transmission part to the second transmission unit being greater than the speed reduction ratio of the first transmission part to the second transmission unit; in a developing state, the second transmission unit is in transmission connection with the first transmission part, and in a non-developing state, the second transmission unit can move relative to the first transmission unit to be in transmission connection with the second transmission part.

2. The process cartridge according to claim 1, wherein, The first transmission unit is located on the side of the driving force receiving member close to the first box body, the processing box comprises a switching mechanism for receiving a switching force from the image forming device, the switching mechanism is operatively connected to the developing unit, and the second transmission unit can move relative to the first transmission unit under the action of the switching force.

3. The process cartridge of claim 1, wherein, The first transmission part and the second transmission part are in abutting connection along the axial direction, the second transmission unit comprises a third transmission part, in the developing state, the third transmission part is in transmission connection with the first transmission part, and in the non-developing state, the third transmission part is separated from the first transmission part, and the third transmission part moves relative to the first transmission part to be in transmission connection with the second transmission part. Alternatively, the first transmission part and the second transmission part are arranged in axial spacing, the second transmission unit comprises a third transmission part and a fourth transmission part arranged side by side along the axial direction of the developing roller, in the developing state, the third transmission part is in transmission connection with the first transmission part, and the fourth transmission part is separated from the first transmission part and the second transmission part; in the non-developing state, the fourth transmission part is in transmission connection with the second transmission part, and the third transmission part is separated from the first transmission part and the second transmission part.

4. The process cartridge of claim 3 wherein, The first transmission part is a full-tooth gear structure; and / or, the second transmission part is a full-tooth gear structure or a toothless gear structure; and / or, the third transmission part is a full-tooth gear structure; and / or, the fourth transmission part is a full-tooth gear structure.

5. The process cartridge of claim 1, wherein, The processing cartridge comprises a first elastic member sleeved on the outer periphery of the input shaft and abutting between the second transmission unit and the first cartridge body, and the first elastic member is used to switch the second transmission unit between transmission connection with the first transmission part and transmission connection with the second transmission part.

6. The process cartridge of claim 1, wherein, The first cartridge body can move relative to the second cartridge body, and in the developing state, the developing roller is in contact with the photosensitive drum, and in the non-developing state, the first cartridge body can drive the developing roller to move relative to the photosensitive drum to separate from the photosensitive drum. Alternatively, the first cartridge body and the second cartridge body have no relative movement, and in the developing state and the non-developing state, the developing roller keeps in contact with the photosensitive drum.

7. The process cartridge of claim 2 wherein, The switching mechanism can swing under the action of the switching force, and the switching mechanism is fixedly connected with the first cartridge body. The second transmission unit comprises a connecting shaft and an abutting part, one end of the connecting shaft is provided with a connecting hole, the input shaft of the developing roller is matched with the connecting hole, and the abutting part protrudes from the connecting shaft away from the one end of the connecting hole in the axial direction. An inclined stop surface is formed on one side wall of the second cartridge body in the axial direction, and the inclined stop surface extends in the direction away from the photosensitive drum from the top side to the bottom side.

8. The process cartridge of claim 7 wherein, The abutting part is separably abutted with the inclined stop surface in the axial direction, and the abutting part can be abutted with the inclined stop surface under the action of the switching force and moved relative to the first cartridge body and the first transmission unit under the abutting force of the inclined stop surface.

9. The process cartridge of claim 2 wherein, The processing cartridge comprises a second elastic member, one end of the second elastic member is connected with the first cartridge body, and the other end is connected with the second cartridge body. The second transmission unit comprises a connecting shaft and an abutting part, one end of the connecting shaft is provided with a connecting hole, the input shaft of the developing roller is matched with the connecting hole, and the abutting part protrudes from the connecting shaft away from the one end of the connecting hole in the axial direction.

10. The process cartridge of claim 9 wherein, The switching mechanism comprises a moving rod and a retaining member, one end of the moving rod is rotationally connected with the first cartridge body, and the other end is used to receive the switching force from the image forming apparatus. The retaining member is provided with a retaining surface, and a buckle position is formed on one side wall of the second cartridge body in the axial direction. When the abutting part is separated from the abutting inclined surface, the retaining surface is separated from the buckle position, and when the abutting part is abutted with the abutting inclined surface, the retaining surface is matched with the buckle position. And / or, the switching mechanism further comprises a third elastic member, one end of the third elastic member is connected with the moving member, the other end is connected with the moving rod, the third elastic member is used for driving the moving rod to move relative to the retaining member after the switching force is cancelled.

Images