Coupling of processing box and processing box

Abstract

The utility model discloses a coupling of a processing box and the processing box, the processing box can be detachably installed in a main assembly of an electronic imaging device, the main assembly comprises a drum drive transmission unit, and the drum drive transmission unit comprises a drum drive part and a braking force applying assembly; a driving force transmission part is arranged on the drum driving part, the coupler can receive first acting force applied by the driving force transmission part to rotate, the coupler further comprises a joint part, and the joint part is of a groove structure; and the groove structure of the joint part is clamped with the driving force transmission part so as to receive the first acting force applied by the driving force transmission part to rotate. Compared with the prior art, the structure of the coupling in the processing box provided by the utility model cannot hinder the movement of the drum driving piece, so that the normal and stable operation of the printing process can be ensured, the separation of the coupling and the drum driving piece is facilitated, and a user can smoothly finish the dismounting action.

Description

[0001] This application is a divisional application of the Chinese patent application submitted to the State Intellectual Property Office of China on August 29, 2023, with application number 202322342184.7 and application name “A Processing Box”. Technical Field

[0002] The utility model relates to the technical field of electronic imaging equipment, in particular to a coupling of a processing box and the processing box. Background Art

[0003] An image forming apparatus of an electrophotographic method includes a process cartridge for developing an electrostatic latent image on a photosensitive drum using a developer. The process cartridge includes a developing unit and a drum unit. The developing unit includes a developing roller rotatably supported in a housing thereof, and the drum unit includes a photosensitive drum rotatably supported in a housing thereof. Development is performed by supplying toner stored in the housing from the developing roller to the photosensitive drum.

[0004] In the prior art, the photosensitive drum has a coupling, and when the process cartridge is installed on the image forming device, the coupling engages with the drive transmission unit in the image forming device. However, when the process cartridge needs to be removed from the image forming device, the coupling may not be able to be disengaged smoothly due to the specific structure of the coupling, resulting in the inability to complete the removal action. Utility Model Content

[0005] The utility model aims to provide a coupling of a processing box and a processing box to solve the technical problems in the prior art, and it can be beneficial for the coupling to be smoothly separated from a drum driving member.

[0006] The utility model provides a coupling of a processing box, wherein the processing box can be detachably installed in the main component of an electronic imaging device, wherein the main component includes a drum drive transmission unit, and the drum drive transmission unit includes a drum drive member and a braking force applying component; a driving force transmission part is provided on the drum drive member, and the coupling can receive a first force applied by the driving force transmission part to rotate, and the coupling also includes a coupling part, which is a groove structure; the groove structure of the coupling part is engaged with the driving force transmission part to receive the first force applied by the driving force transmission part to rotate.

[0007] In some embodiments, the drum driving member further includes a slope component and a positioning portion, and the driving force transmission portion is connected to the slope component and is located between the positioning portion and the slope component.

[0008] In some embodiments, an assembly groove is provided in the drum driving member, and the braking force applying assembly includes a first movable member; the driving force transmission member is formed in the assembly groove, and the first movable member is arranged in the assembly groove; the positioning member is formed in the assembly groove and is located at the central axis position of the drum driving member; the driving force transmission member is symmetrically arranged on opposite sides of the center line of the positioning member.

[0009] In some embodiments, the first movable component is movable in an axial direction relative to the drum driving member.

[0010] In some embodiments, the drum driving member can be moved and extended by a preset distance in the axial direction.

[0011] In some embodiments, the drum drive member can move in the axial direction to achieve an extension or retraction action.

[0012] In some embodiments, the braking force applying assembly also includes a second movable component, the first movable component and the second movable component are engaged with each other, and the second movable component is located on the inner side of the first movable component, that is, the second movable component is closer to the positioning part of the drum drive than the first movable component.

[0013] In some embodiments, a positioning fitting portion is further provided in the coupling, and when the processing box is installed on the main component, the positioning portion of the drum driving member can be inserted into the positioning fitting portion for engagement.

[0014] In some embodiments, the positioning fitting portion is provided with a conical chamfer.

[0015] In some embodiments, the coupling also includes a separation portion, and the braking force applying assembly includes a movable part, which can move along the axial direction relative to the drum driving member; when the processing box is installed on the main assembly, the separation portion is inserted into the movable part.

[0016] In some embodiments, the movable member includes a first movable component and a second movable component, the first movable component and the second movable component are engaged with each other; and the separation portion is inserted between the first movable component and the second movable component.

[0017] In some embodiments, the separation portion is an annular protrusion structure, and the engagement portion is formed at the lower end of the separation portion.

[0018] In some embodiments, the width of the groove structure of the engaging portion is greater than or equal to the width of the driving force transmitting portion.

[0019] In some embodiments, the groove structure of the engaging portion includes a first groove segment and a second groove segment, the width of the second groove segment is greater than the width of the first groove segment, and the width of the first groove segment is adapted to the width of the driving force transmission portion.

[0020] In some embodiments, there are two engaging parts, and the engaging parts are symmetrically arranged on the coupling.

[0021] In some embodiments, a bottom wall is provided on the engaging portion, and when the engaging portion is engaged with the driving force transmitting portion, the bottom wall contacts at least a portion of the driving force transmitting portion to generate a force in the opposite direction to the first force applied by the driving force transmitting portion.

[0022] In some embodiments, when the bottom wall is engaged with the driving force transmitting portion, the bottom wall abuts against a surface of the driving force transmitting portion to generate a force in a direction opposite to the first force.

[0023] Correspondingly, the present application also provides a processing box, which includes a coupling of the processing box as described in any of the above embodiments.

[0024] Compared with the prior art, the coupling in the processing box provided by the utility model has a coupling portion, and the drum driving component of the electronic imaging device has a driving force transmission portion. When the drum driving component moves back and forth along the first direction, the structure of the coupling will not hinder the movement of the drum driving component. It can not only ensure the normal and stable printing process, but also facilitate the separation of the coupling and the drum driving component, prevent the coupling and the drum driving component from being unable to separate smoothly, and ensure that the user can successfully complete the disassembly action. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of a conventional image forming device.

[0026] Figure 2 The figure is a schematic diagram of an exploded view of a drum driving component of a conventional image forming device.

[0027] Figure 3 It is a structural schematic diagram of an existing first braking force engagement component and a braking transmission component.

[0028] Figure 4 It is a cross-sectional view of an existing drum driving component.

[0029] Figure 5 It is a cutaway perspective view of a conventional drum drive.

[0030] Figure 6 The figure is a schematic diagram of the disassembly of the existing drum drive components.

[0031] Figure 7It is an overall schematic diagram of a processing box at one angle.

[0032] Figure 8 It is an overall schematic diagram of the processing box from another angle.

[0033] Fig. 9 Schematic diagram of the photosensitive drum of the first embodiment.

[0034] Fig.10 Schematic diagram of the coupling of the first embodiment.

[0035] Fig.11 It is a schematic diagram of the process of inserting the coupling between the movable parts in the first embodiment.

[0036] Fig.12 Schematic diagram of the coupling and drum driving member engagement process in the first embodiment.

[0037] Fig.13 It is a schematic diagram of the coupling inserted between movable parts in the first embodiment.

[0038] Fig.14 Schematic diagram of the connection between the coupling and the drum driving member of the first embodiment.

[0039] Fig.15 Schematic diagram of the coupling of embodiment 2.

[0040] Fig.16 It is a disassembly schematic diagram of the coupling of the second embodiment.

[0041] Fig.17 It is a cross-sectional view of the coupling of the second embodiment during the engagement process.

[0042] Fig.18 Schematic diagram of the engagement process between the coupling and the drum driving member of the second embodiment.

[0043] Fig.19 It is a cross-sectional view of the coupling engagement of the second embodiment.

[0044] Fig. 20 Schematic diagram of the connection between the coupling and the drum driving member of the second embodiment.

[0045] Fig.21 Schematic diagram of the coupling of embodiment 3.

[0046] Fig. 22 Schematic diagram of disassembly of the coupling of embodiment 3.

[0047] Fig.23 It is a cross-sectional view of the coupling of Example 3 in its original state.

[0048] Fig.24 It is a schematic diagram of the process of inserting the coupling between the movable parts in Example 3.

[0049] Fig.25 It is a cross-sectional view of the coupling of Example 3 during the engagement process.

[0050] Fig.26 Schematic diagram of the engagement process between the coupling and the drum drive member in Example 3.

[0051] Fig. 27 It is a schematic diagram of embodiment 3 in which the coupling is inserted between movable parts.

[0052] Fig.28 Schematic diagram of the connection between the coupling and the drum drive member of Example 3.

[0053] Fig.29 Schematic diagram of the coupling of embodiment 4.

[0054] Fig.30 Schematic diagram of the engagement of the coupling and the drum drive member of the fourth embodiment.

[0055] Fig.31 Schematic diagram of the coupling of embodiment 5.

[0056] Fig.32 Schematic diagram of the engagement of the coupling and the drum drive member of the fifth embodiment.

[0057] Fig.33 This is a schematic structural diagram of an angle of the coupling of Example 6.

[0058] Fig.34 This is a schematic structural diagram of the coupling of Example 6 from another angle.

[0059] Fig.35 It is a schematic structural diagram of the drum driving component of the seventh embodiment.

[0060] Fig.36 This is a schematic diagram of the structure of the coupling of Example 7.

[0061] Fig.37 It is a partial exploded schematic diagram of the conductive end of the processing box of the eighth embodiment.

[0062] Fig.38 2. It is a cross-sectional view of the conductive end of the processing box of Example 8.

[0063] Fig.39 It is a partial exploded schematic diagram of the conductive end of the processing box of the ninth embodiment.

[0064] Fig.40 It is a cross-sectional view of the conductive end of the processing box of Example 9.

[0065] Fig.41 It is a partial exploded schematic diagram of the conductive end of the processing box of the tenth embodiment.

[0066] Fig.424 is a cross-sectional view of the conductive end of the processing box of embodiment 10.

[0067] Fig.43 It is a schematic diagram of the partial structure of the coupling and the photosensitive drum of the eleventh embodiment.

[0068] Fig.44 It is a partial exploded schematic diagram of the coupling and the photosensitive drum of the eleventh embodiment.

[0069] Fig.45 It is a schematic diagram of the structure of the photosensitive drum and coupling of the twelfth embodiment.

[0070] Fig.46 It is an exploded schematic diagram of the coupling and the force applying member of the twelfth embodiment.

[0071] Fig.47 It is a partial cross-sectional view of the driving end of the processing box of the twelfth embodiment.

[0072] Fig.48 It is a partial cross-sectional view of the conductive end of the processing box of the twelfth embodiment.

[0073] Description of reference numerals:

[0074] 100-processing box, 101-conductive side end cover, 102-driving side end cover, 103-developing unit, 104-drum unit, 105-photosensitive drum, 106-coupling, 107-separating part, 108-joining part, 109-positioning matching part, 110-first coupling body, 111-second coupling body, 112-through hole, 113-connecting shaft, 114-elastic member, 115-annular groove, 116-card ring, 117-guide column, 118-guide rib, 119-guide cavity, 120-guide groove, 121-first groove section, 122-second groove section, 123-pressing portion, 124-driving force receiving block, 125-driving force receiving surface, 126-conductive bearing, 127-conductive shaft pin, 128-force applying member, 129-annular groove, 130-developing frame, 131-drum frame, 132-developing coupling;

[0075] M-image forming device, 170-main assembly, 171-tray, 180-drum driving member, 180b-rotation stop portion, 180a-slope member, 180d-driving force transmitting portion, 180i-positioning portion, 201-rotating member, 202-support shaft, 203-drum drive transmitting unit, 204-first moving member, 204a-flange portion, 204e-second protrusion, 204c-rotation stop recess, 206-braking member, 206a-fixed side, 206b-rotating side, 206d-end surface, 207-braking transmitting member, 207a-flange portion, 207b-shaft portion, 207f-third protrusion, 208-second moving member, 208c-rotation stop protrusion, 210-second engagement spring, 211-first engagement spring, 212-limiting portion, 213-assembly groove, 214-first gap, 215-transfer slope;

[0076] D1-first direction;

[0077] A-preset rotation direction;

[0078] M1 - first preset axis. DETAILED DESCRIPTION

[0079] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0080] like Figures 1 to 6 As shown, the electronic imaging device M includes a main assembly 170, a tray 171 and a door cover 11. The main assembly 170 is provided with a housing portion, a drum drive transmission unit 203, a separation mechanism and a transfer unit, etc. The tray 171 can accommodate the process cartridge 100 and can move relative to the main assembly 170 to install the process cartridge 100 into the housing portion of the main assembly 170. The door cover 11 is provided on the outside of the main assembly 170, and can open or close the housing portion of the main assembly 170.

[0081] like Figure 1As shown, four processing boxes 100 (100Y, 100M, 100C, 100K) are arranged in the main component 170, namely the first processing box 100Y, the second processing box 100M, the third processing box 100C and the fourth processing box 100K. The four processing boxes 100 are arranged basically horizontally. The rotational driving force is respectively from the driving output part of the main component 170, and the main component 170 provides bias voltages (charging bias, developing bias, etc.) to the first to fourth processing boxes 100 (100Y, 100M, 100C, 100K). The processing box 100 is installed in the main component 170 through a tray 171. Specifically, the tray 171 is configured to be able to move in a substantially horizontal direction when the main component 170 is installed on a horizontal surface, and the four processing boxes 100 are respectively installed in each positioning part of the tray 171. When the tray 171 moves into the main component 170, a plurality of processing boxes 100 move into the main component 170 together with the tray 171. When the process cartridges 100 need to be replaced, a plurality of process cartridges 100 may be moved together with the tray 171 to the outside of the main assembly 170 .

[0082] The process box 100 has a developing coupling part (developing driving force receiving part) and a drum coupling part (photosensitive part coupling part). The door cover 11 of the main assembly 170 is closed, and the main assembly side drum drive transmission unit 203 for transmitting the driving force to the process box is engaged with the developing drive transmission unit to transmit the drive to the process box.

[0083] When the door cover 11 is opened, the drum drive transmission unit 203 and the developer drive transmission unit are retracted and detached from the drum connecting part and the developer connecting part of the processing box 100, so that the tray 171 and the processing box 100 can be smoothly removed from the main assembly 170.

[0084] like Figure 2 as well as Figure 4As shown, the drum drive transmission unit 203 arranged on the main component 170 includes a driving force transmission component and a braking force applying component, wherein the driving force transmission component includes a rotating member 201 and a drum driving member 180, the rotating member 201 is rotatably supported on the support shaft 202, and one end of the drum driving member 180 is provided with a rotation stop portion 180b for receiving the driving force, and the other end is provided with a driving force transmission portion 180d. The drum driver 180 has a basic structure of a hollow cylindrical shape, and a pair of spaced and oppositely arranged inclined surface components 180a are formed in the inner cavity thereof, protruding from the inner wall toward the rotation center close to the drum driver 180, and a connecting frame 180d (also called a driving force transmission component) constructed as a block structure is connected between the pair of inclined surface components 180a, and a positioning portion 180i is provided at the middle position of the connecting frame 180d, and the positioning portion 180i is configured to extend outward from the approximate center position of the connecting frame 180d, that is, the positioning portion 180i is formed at the central axis position of the drum driver 180. In the drum driver 180, there are two block structures of the driving force transmission component 180d, and the two block structures are symmetrically arranged on opposite sides of the center line of the positioning portion 180i.

[0085] The drum driver 180 is assembled on the rotating member 201 in a manner that it can move along the axial direction M1. The rotating member 201 drives the drum driver 180 to rotate through the cooperation between the rotation stop portion 201b of the rotating member 201 and the rotation stop portion 180b of the drum driver 180.

[0086] like Figures 2 to 6 As shown, the braking force applying assembly includes a braking member 206, a first movable member 204, a second movable member 208, a first engagement spring 211, a second engagement spring 210 and a braking transfer member 207, wherein the braking member 206 includes a fixed side 206a and a rotating side 206b, the fixed side 206a is fixedly connected to the support shaft 202, and the rotating side 206b is capable of rotating relative to the fixed side 206a and generating a braking force, and the method for generating the braking force can be appropriately selected from those methods using friction and viscosity.

[0087] The first moving member 204 and the second moving member 208 are used to apply a braking force to the process box 100. The two can be assembled together by engaging the rotation stop protrusion 208c and the rotation stop recess 204c, and the two can have a synchronous action process. The second moving member 208 is located inside the first moving member 204, and the engaging portion 204b of the first moving member 204 can fit with the inclined member 180a or abut against each other.

[0088] The shaft portion 207 b of the brake transmission member 207 passes through the through holes in the middle of the first and second moving parts 204 and 208 and is connected to the rotating side 206 b of the brake member 206 to be able to transmit braking force to the first and second moving parts 204 and 208 .

[0089] Specifically, the flange portion 207a of the brake transfer member 207 is provided with a first protrusion 207e, and the flange portion 204a of the first movable component 204 is correspondingly provided with a second protrusion 204e. When the first protrusion 207e of the brake transfer member 207 is engaged with the second protrusion 204e of the first movable component 204, the brake transfer member 207 can transmit the braking force to the first movable component 204.

[0090] The first movable component 204 and the second movable component 208 can move on the first preset axis M1 relative to the brake transfer member 207 and the brake member 206. When the first protrusion 207e of the brake transfer member 207 is offset or separated from the second protrusion 204e of the first movable component 204 on the first preset axis M1, the second movable component 208 and the first movable component 204 will not receive the braking force.

[0091] Continue, reference Figure 4 and Figure 5 One end of the first engagement spring 211 presses against the end face 206d of the brake member 206, and the other end presses against the flange portion 204a of the first movable component 204. The first engagement spring 211 is in a compressed state, and applies an elastic force to the first movable component 204 along the M1B direction. This elastic force can keep the first protrusion 207e of the brake transfer member 207 engaged with the second protrusion 204e of the first movable component 204.

[0092] The second engagement spring 210 is a compression coil spring and is configured to be clamped and compressed between the end face 206d of the brake member 206 and the flange portion 207a of the brake transfer member 207. The second engagement spring 210 applies a repulsive force (pushing force, elastic force) to each of the end face 206d of the brake member 206 and the flange portion 207a of the brake transfer member 207.

[0093] Among the components of the drum drive transmission unit 203 described above, the third protrusion 207f at the end of the brake transmission member 207 in the axial direction M1A abuts against the contact surface 108f of the drum driver 180 under the action of the first engagement spring 211 and the second engagement spring 210. The movement of the drum driver 180 in the arrow M1B direction is regulated (restricted) by the axial direction restriction portion 212 so that the drum driver 180 does not fall off the drum drive transmission unit 203 on the main assembly 170 side.

[0094] Among the various components of the above-mentioned drum drive transmission unit 203, the drum driving member 180 is capable of moving in the M1A and M1B directions relative to the rotating member 201, the first movable member 204 and the second movable member 208 are capable of moving in the M1A and M1B directions relative to the brake transmission member 207 and the rotating member 201, and are also capable of moving in the M1A and M1B directions relative to the drum driving member 180.

[0095] like Figures 2 to 6 As shown, in the prior art, when the drum driver 180 rotates and the processing box is not matched with the drum driver 180, that is, when the drum driver 180 is idling, the raised portion of the drum driver 180 on the M1A side squeezes the raised portion of the brake transfer member 207 on the M1B side, and both raised portions are inclined surfaces, so that the brake transfer member 207 moves toward the inside of the drum driver 180 (moves along the M1A direction), and the brake transfer member 207 drives the first movable member 204 and the second movable member 208 to move toward the inside of the drum driver 180. When the drum driver 180 rotates until its raised portion passes the raised portion of the brake transfer member 207, the brake transfer member 207, the first movable member 204, and the second movable member 208 are 208 rebounds (moves in the M1B direction) and produces an abnormal sound under the action of the first engagement spring 211 and the second engagement spring 210; when the drum driving component 180 rotates until the inclined surface component 180a contacts the first movable component 204, the first movable component 204 is driven to rotate, while the brake transmission component 207 does not rotate. When the first movable component 204 rotates until the second protrusion 204e on it contacts the first protrusion 207e of the brake transmission component 207, the first movable component 204 moves toward the inside of the drum driving component 180. After the second protrusion 204e of the first movable component 204 passes the first protrusion 207e of the brake transmission component 207, the first movable component 204 rebounds and produces an abnormal sound.

[0096] An assembly groove 213 is provided in the drum driving component 180. The assembly groove 213 forms an opening on the surface of the drum driving component 180. The opening is arranged facing the position of the coupling 106. The extension direction of the assembly groove 213 is parallel to the first direction D1. When the processing box 100 is installed in the image forming device, the drum driving component 180 moves along the first direction D1 toward the coupling 106. The coupling 106 can extend from the opening into the assembly groove 213. The driving force transmission part 180d is formed in the assembly groove 213.

[0097] Embodiment 1

[0098] Reference Figures 7 to 14 As shown, the utility model provides a processing box 100 for being installed in an image forming device.

[0099] The process cartridge 100 includes a developing unit 103, a drum unit 104 and a driving assembly.

[0100] The developing unit 103 includes a developing frame 130, a developing roller, a developing coupling 132, a developing roller gear, a powder feeding roller, a powder feeding roller gear and a powder discharge knife. The drum unit 104 includes a drum frame 131, a photosensitive drum 105, a coupling 106 and a charging roller.

[0101] The developing frame 130 forms a powder bin for storing toner, and the developing frame 130 is roughly in the shape of a long box. The developing frame 130 is provided with a driving side bearing and a conductive side bearing at both ends of the length direction, respectively. The powder feeding roller and the developing roller are rotatably supported on the driving side bearing and the conductive side bearing at both ends of the length direction of the developing frame 130. The powder feeding roller and the developing roller can rotate under the action of the driving assembly, and the axial directions of the powder feeding roller and the developing roller are along the length direction of the developing frame 130. The powder feeding roller transports the toner to the developing roller and is adsorbed by the charged developing roller.

[0102] The drum frame 131 also has a length direction, which is consistent with the length direction of the developing frame 130. The two ends of the drum frame 131 in the length direction are respectively provided with a driving side end cover 102 and a conductive side end cover 101. The photosensitive drum 105 is rotatably supported on the two ends of the drum frame 131 in the length direction, specifically supported on the driving side end cover 102 and the conductive side end cover 101. The two ends of the photosensitive drum 105 in the axial direction are respectively provided with a driving bearing and a conductive bearing. The photosensitive drum 105 is supported on the through holes of the driving side end cover 102 and the conductive side end cover 101 respectively through the driving bearing and the conductive bearing. The photosensitive drum 105 is arranged on the lower end side of the drum frame 131 in the height direction. The developing unit 103 and the drum unit 104 are connected to each other through the driving side end cover 102 and the conductive side end cover 101. The developing roller and the photosensitive drum 105 are close to each other. The toner adsorbed by the developing roller is transferred to the photosensitive drum 105 through the potential difference between the developing roller and the photosensitive drum 105. The charging roller is used to charge the surface of the photosensitive drum 105 with a uniform charge so that the photosensitive drum 105 can adsorb the toner.

[0103] The developing coupling 132, the developing roller gear, the powder feeding roller gear and the stirring frame gear are arranged on the outer side of the driving side bearing. Specifically, the driving side bearing is provided with a supporting hole for supporting the developing coupling 132, and the developing coupling 132 is used to mesh with the developing drive transmission unit of the electronic imaging device and receive the driving force; the developing roller gear is sleeved on the end of the developing roller shaft extending from the driving side bearing, and the powder feeding roller gear is sleeved on the end of the powder feeding roller shaft extending from the driving side bearing. The developing roller gear and the powder feeding roller gear are directly or indirectly meshed with the developing coupling 132 to transmit the driving force received by the developing coupling 132, thereby driving the developing roller and the powder feeding roller to rotate.

[0104] The coupling 106 is disposed at the end of the photosensitive drum 105 in the length direction (axial direction), and the coupling 106 is used to receive the driving force of the electronic imaging device (transmitted by engaging with the drum driving member 180 ) to drive the photosensitive drum 105 to rotate.

[0105] Reference Fig. 9 As shown, the first end of the coupling 106 in this embodiment is connected to the shaft end of the photosensitive drum 105, and the first end of the coupling 106 is provided with a recess (not shown in the figure) that can play a role of engagement with the photosensitive drum 105 or the two can serve as installation orientation identification points during installation. The second end of the coupling 106 is provided with a separation portion 107 and a connection portion 108, and the separation portion 107 and the connection portion 108 are sequentially distributed along the preset rotation direction A.

[0106] The separation portion 107 includes an annular protrusion structure protruding from the second end of the coupling 106, and the engagement portion 108 is a groove structure recessed on the end surface of the annular protrusion structure. The position and size of the engagement portion 108 correspond to the position and size of the driving force transmission portion 180d.

[0107] In this embodiment, refer to Figure 4 as well as Fig.10 As shown, a positioning portion 180i is provided in the assembly groove 213, and a positioning matching portion 109 is provided on the coupling 106. The positioning matching portion 109 is used to form a positioning match with the positioning portion 180i. In a feasible implementation, the positioning portion 180i is a positioning boss protruding from the driving force transmission portion 180d, and the axis of the positioning boss coincides with the axis of the driving force transmission portion 180d. The positioning boss extends toward the open direction of the assembly groove 213. The positioning matching portion 109 is a positioning convex ring protruding from the second end of the coupling 106. The inner ring surface of the positioning convex ring is clearance-matched with the outer peripheral surface of the positioning boss. Preferably, the inner ring surface of the positioning convex ring can be provided with a conical chamfer, so that it plays a guiding role in the process of the positioning boss and the positioning convex ring engaging.

[0108] The thickness of the separation portion 107 is unevenly arranged along the first direction D1, which is conducive to generating friction or interference force between the separation portion 107 and the movable member, so that the drum unit 104 and the image forming device are installed more firmly and the engagement is more stable during printing.

[0109] like Figure 11-14The coupling process of the coupling 106 and the drum driver 180 is described in detail. There are two initial postures (initial relative positions) of the coupling 106 and the drum driver 180, which are divided into a first posture and a second posture. The first posture refers to that the coupling 108 provided on the coupling 106 is located on the upstream side of the corresponding position of the driving force transmission part 180d provided on the driving force transmission part 180d along the rotation direction A, and the drum driver 180 needs to rotate a certain distance along the A direction to reach the second posture, that is, the coupling 108 is located directly above the corresponding driving force transmission part 180d, and the coupling 108 and the driving force transmission part 180d can be directly engaged.

[0110] The working process of this embodiment is:

[0111] When the drum driver 180 is in the first posture, when the process cartridge 100 needs to be installed on the image forming device, the process cartridge 100 is installed on the tray, and then the process cartridge 100 and the tray are pushed into the image forming device, the front door is closed, and the drum driver 180 extends along the first direction D1 to engage with the coupling 106 on the drum unit 104. When the drum driver 180 extends along the first direction D1, the separation portion 107 provided on the coupling 106 is inserted between the movable members (the first movable member 204 and the second movable member 208). Since the engagement portion 108 provided on the coupling 106 is located at the upstream side of the corresponding position of the driving force transmission portion 180d provided on the drum driver 180 along the preset rotation direction A, that is, the engagement portion 108 and the driving force transmission portion 180d are not correspondingly engaged, the lower end surface of the separation portion 107 is in contact with the upper end surface of the driving force transmission portion 180d, and the drum driver 180 and the coupling 106 can move relative to each other.

[0112] Then, the drum driver 180 starts to rotate along the preset rotation direction A under the drive of the motor. Since the joint 108 provided on the coupling 106 is located at the upstream side of the corresponding position of the driving force transmission part 180d provided on the drum driver 180 along the preset rotation direction A, and the drum driver 180 and the coupling 106 can move relative to each other, after the drum driver 180 rotates a certain distance along the preset rotation direction A, the drum driver 180 reaches the second posture, that is, the joint 108 is located at the position corresponding to the driving force transmission part 180d. At this time, the drum driver 180 moves and extends a certain distance along the first direction D1, and the joint 108 is engaged with the driving force transmission part 180d, so that the coupling 106 can receive the first force applied by the drum driver 180 and rotate synchronously with the drum driver 180 along the preset rotation direction A. The coupling 106 drives the movable part to rotate, and then the drum unit 104 rotates, thereby completing the driving action.

[0113] When the drum driving member 180 is in the second posture, when the process cartridge 100 needs to be installed on the image forming apparatus, the process cartridge 100 is installed on the tray, and then the process cartridge 100 and the tray are pushed into the image forming apparatus, the front door is closed, and the drum driving member 180 extends along the first direction D1 to engage with the coupling 106 on the drum unit 104. When the drum driving member 180 extends along the first direction D1, the separation portion 107 provided on the coupling 106 is inserted between the movable members (the first movable member 204 and the second movable member 208), and the engaging portion 108 corresponds to the position of the driving force transmission portion 180d, so the coupling 106 can be directly engaged with the drum driving member 180, and then the drum driving member 180 starts to rotate along the preset rotation direction A. The engaging portion 108 is engaged with the driving force transmission portion 180d, so that the coupling 106 can receive the first force applied by the drum driving member 180 and rotate synchronously with the drum driving member 180 along the preset rotation direction A. The coupling 106 drives the movable member to rotate, and then the drum unit 104 rotates, thereby completing the driving action.

[0114] When the processing box 100 needs to be removed from the image forming device, the drum driving component 180 stops rotating and retreats along the first direction D1. Since the separation portion 107 and the coupling portion 108 of the coupling 106 will not interfere with the movement of the drum driving component 180, it can not only ensure the normal and stable printing process, but also facilitate the separation of the coupling 106 and the drum driving component 180, prevent the coupling 106 and the drum driving component 180 from being unable to separate smoothly, and ensure that the user can successfully complete the disassembly action.

[0115] The use of this structure facilitates the disengagement of the coupling 106 and the drum driver 180. There are no snap points or reverse snap points, which prevents the coupling 106 and the drum driver 180 from being unable to disengage smoothly, ensuring that the user can successfully complete the disassembly action.

[0116] Embodiment 2

[0117] Reference Figures 15 to 20 As shown, in this embodiment, different from the first embodiment, the coupling 106 includes a first coupling body 110 and a second coupling body 111, and the first end of the first coupling body 110 is connected to the photosensitive drum 105. An elastic member 114 is arranged between the first coupling body 110 and the second coupling body 111, so that the first end of the second coupling body 111 is elastically connected to the second end of the first coupling body 110, so that the second coupling body 111 can elastically reciprocate along the first direction D1, and the separation portion 107 and the coupling portion 108 are both formed at the second end of the second coupling body 111.

[0118] In a feasible embodiment, a through hole 112 is provided on the first coupling body 110, and a connecting shaft 113 is protruded from the side of the second coupling body 111 facing the first coupling body 110, and the connecting shaft 113 is loosely fitted in the through hole 112. The elastic member 114 is preferably a tension spring, and the elastic member 114 is looped on the connecting shaft 113. The opposite ends of the elastic member 114 are respectively in contact with the first coupling body 110 and the second coupling body 111. During the movement of the second coupling body 111 toward the first coupling body 110, the elastic member 114 is squeezed, and the elastic member 114 accumulates elastic restoring force, so that the second coupling body 111 can return to its initial position.

[0119] An annular groove 115 is recessed on the outer circumferential surface of one end of the connecting shaft 113 protruding from the through hole 112, and a retaining ring 116 is embedded in the annular groove 115. The diameter of the retaining ring 116 is larger than the inner diameter of the through hole 112. The retaining ring 116 serves as a limit to prevent the second coupling body 111 from shifting and falling off during movement.

[0120] The working process of this embodiment is:

[0121] When the drum driving member 180 is in the first posture, when the process cartridge 100 needs to be installed on the image forming apparatus, the process cartridge 100 is installed on the tray, and then the process cartridge 100 and the tray are pushed into the image forming apparatus, the front door is closed, and the drum driving member 180 extends along the first direction D1 to engage with the drum unit 104. When the drum driving member 180 extends along the first direction D1, the separation portion 107 provided on the coupling 106 is inserted between the movable members (the first movable member 204 and the second movable member 208). Since the coupling 108 provided on the coupling 106 is located on the upstream side of the corresponding position of the driving force transmission part 180d provided on the drum driving member 180 along the preset rotation direction A, that is, the coupling 108 and the driving force transmission part 180d are not correspondingly engaged, the lower end surface of the separation part 107 abuts against the upper end surface of the driving force transmission part 180d, and the elastic member 114 is compressed to accumulate elastic restoring force, so that the drum driving member 180 and the coupling 106 can move relative to each other.

[0122] Then, the drum driver 180 starts to rotate along the preset rotation direction A under the drive of the motor. Since the joint 108 provided on the coupling 106 is located at the upstream side of the corresponding position of the driving force transmission part 180d provided on the drum driver 180 along the preset rotation direction A, and the drum driver 180 and the coupling 106 can move relative to each other, after the drum driver 180 rotates a certain distance along the preset rotation direction A, the drum driver 180 reaches the second posture, that is, the joint 108 is located at the position corresponding to the driving force transmission part 180d. The first coupling 110 no longer abuts against the drum driver 180. At this time, the elastic restoring force of the elastic member 114 is released, so that the second coupling 111 moves toward one side of the drum driver 180, and the joint 108 is engaged with the driving force transmission part 180d, so that the coupling 106 can receive the first force applied by the drum driver 180 and rotate synchronously with the drum driver 180 along the preset rotation direction A. The coupling 106 drives the movable member to rotate, and then the drum unit 104 rotates, thereby completing the driving action.

[0123] When the drum driver 180 is in the second posture, when the process cartridge 100 needs to be installed on the image forming apparatus, the process cartridge 100 is installed on the tray, and then the process cartridge 100 and the tray are pushed into the image forming apparatus, the front door is closed, and the drum driver 180 extends along the first direction D1 to engage with the drum unit 104. When the drum driver 180 extends along the first direction D1, the separation portion 107 provided on the coupling 106 is inserted between the movable members (the first movable member 204 and the second movable member 208), and the engaging portion 108 corresponds to the position of the driving force transmission portion 180d, so the coupling 106 can be directly engaged with the drum driver 180, and then the drum driver 180 starts to rotate along the preset rotation direction A. The engaging portion 108 is engaged with the driving force transmission portion 180d, so that the coupling 106 can receive the first force applied by the drum driver 180 and rotate synchronously with the drum driver 180 along the preset rotation direction A. The coupling 106 drives the movable member to rotate, and then the drum unit 104 rotates, thereby completing the driving action.

[0124] The other structures of the process box 100 of this embodiment are the same as those of the first embodiment and will not be described again.

[0125] Embodiment 3

[0126] Reference Figures 21 to 28As shown, in this embodiment, different from the first embodiment, the coupling 106 includes a first coupling body 110 and a second coupling body 111, and the first end of the first coupling body 110 is connected to the photosensitive drum 105. An elastic member 114 is arranged between the first coupling body 110 and the second coupling body 111, so that the first end of the second coupling body 111 is elastically connected to the second end of the first coupling body 110, so that the second coupling body 111 can elastically reciprocate along the first direction D1, and the separation portion 107 and the coupling portion 108 are both formed at the second end of the second coupling body 111.

[0127] In a feasible embodiment, a through hole 112 is provided on the first coupling body 110, and a connecting shaft 113 is protruded from the side of the second coupling body 111 facing the first coupling body 110, and the connecting shaft 113 is loosely fitted in the through hole 112. The elastic member 114 is preferably a tension spring, and the elastic member 114 is looped on the connecting shaft 113. The opposite ends of the elastic member 114 are respectively in contact with the first coupling body 110 and the second coupling body 111. During the movement of the second coupling body 111 toward the first coupling body 110, the elastic member 114 is squeezed, and the elastic member 114 accumulates elastic restoring force, so that the second coupling body 111 can return to its initial position.

[0128] An annular groove 115 is recessed on the outer circumferential surface of one end of the connecting shaft 113 protruding from the through hole 112, and a retaining ring 116 is embedded in the annular groove 115. The diameter of the retaining ring 116 is larger than the inner diameter of the through hole 112. The retaining ring 116 serves as a limit to prevent the second coupling body 111 from shifting and falling off during movement.

[0129] The first coupling body 110 and the second coupling body 111 can move relative to each other along the first direction D1, but the relative rotational movement between the first coupling body 110 and the second coupling body 111 is limited, and the first coupling body 110 and the second coupling body 111 keep rotating synchronously. In a feasible implementation manner, a guide column 117 is convexly provided on the second coupling body 111, and a guide rib 118 is provided on the outer peripheral surface of the guide column 117. A guide cavity 119 is concavely provided on one side of the first coupling body 110 facing the second coupling body 111. The hole 112 is arranged on the bottom wall of the guide cavity 119, and a guide groove 120 is recessed on the side wall of the guide cavity 119. The guide groove 120 and the guide rib 118 both extend along the first direction D1. The positions of the guide groove 120 and the guide rib 118 correspond to each other. The guide column 117 extends into the guide cavity 119, and the guide rib 118 and the guide groove 120 form a clearance fit, thereby limiting the relative rotation between the second coupling body 111 and the first coupling body 110. The second coupling body 111 can only move back and forth along the first direction D1.

[0130] In this embodiment, the separation portion 107 is an annular protrusion structure, the outer diameter of the ring is approximately 10.9 mm, the inner diameter is 10.5 mm, and the thickness is approximately 0.2 mm. This is conducive to the separation portion 107 being inserted between the movable parts. The thickness of the annular column can be uniformly set along the first direction D1, or unevenly set along the first direction D1. The thickness of the annular column is unevenly set along the first direction D1, which is conducive to the separation portion 107 and the movable part to generate friction or interference force, so that the processing box 100 and the image forming device are installed more firmly and the connection is more stable during the printing process.

[0131] The length of the separation portion 107 along the first direction D1 is greater than or equal to the distance between the upper surface of the driving force transmission portion 180d and the upper surface of the drum driving member 180, so as to ensure that the driving force transmission portion 180d is engaged with the engagement portion 108 and is used to receive the first force applied by the driving force transmission portion 180d. Specifically, the length of the separation portion 107 along the first direction D1 is approximately 5 mm.

[0132] The width of the joint portion 108 along the preset rotation direction A is greater than or equal to the width of the driving force transmission portion 180d along the preset rotation direction A, which is conducive to the joint portion 108 adapting to the width of the driving force transmission portion 180d and engaging with the driving force transmission portion 180d. Specifically, the circumferential length of the joint portion 108 along the preset rotation direction A is greater than or equal to 3.8 mm.

[0133] The depth of the joint portion 108 along the first direction D1 is greater than or equal to the thickness of the driving force transmission portion 180d along the first direction D1, which is conducive to the joint portion 108 and the driving force transmission portion 180d being stably engaged and receiving the driving force applied by the driving force transmission portion 180d. Specifically, the depth of the joint portion 108 along the first direction D1 is approximately 0.5 mm, so as to ensure that the joint portion 108 and the driving force transmission portion 180d are stably engaged and can stably receive the driving force applied by the driving force transmission portion 180d.

[0134] The working process of this embodiment is:

[0135] When the drum driving member 180 is in the first posture, when the process cartridge 100 needs to be installed on the image forming apparatus, the process cartridge 100 is installed on the tray, and then the process cartridge 100 and the tray are pushed into the image forming apparatus, the front door is closed, and the drum driving member 180 extends along the first direction D1 to engage with the drum unit 104. When the drum driving member 180 extends along the first direction D1, the separation portion 107 provided on the coupling 106 is inserted between the movable members (the first movable member 204 and the second movable member 208). Since the coupling 108 provided on the coupling 106 is located on the upstream side of the corresponding position of the driving force transmission part 180d provided on the drum driving member 180 along the preset rotation direction A, that is, the coupling 108 and the driving force transmission part 180d are not correspondingly engaged, the lower end surface of the separation part 107 abuts against the upper end surface of the driving force transmission part 180d, and the elastic member 114 is compressed to accumulate elastic restoring force, so that the drum driving member 180 and the coupling 106 can move relative to each other.

[0136] Then, the drum driver 180 starts to rotate along the preset rotation direction A under the drive of the motor. Since the joint 108 provided on the coupling 106 is located at the upstream side of the corresponding position of the driving force transmission part 180d provided on the drum driver 180 along the preset rotation direction A, and the drum driver 180 and the coupling 106 can move relative to each other, after the drum driver 180 rotates a certain distance along the preset rotation direction A, the drum driver 180 reaches the second posture, that is, the joint 108 is located at the position corresponding to the driving force transmission part 180d. The first coupling 110 no longer abuts against the drum driver 180. At this time, the elastic restoring force of the elastic member 114 is released, so that the second coupling 111 moves toward one side of the drum driver 180, and the joint 108 is engaged with the driving force transmission part 180d, so that the coupling 106 can receive the first force applied by the drum driver 180 and rotate synchronously with the drum driver 180 along the preset rotation direction A. The coupling 106 drives the movable member to rotate, and then the drum unit 104 rotates, thereby completing the driving action.

[0137] When the drum driver 180 is in the second posture, when the process cartridge 100 needs to be installed on the image forming apparatus, the process cartridge 100 is installed on the tray, and then the process cartridge 100 and the tray are pushed into the image forming apparatus, the front door is closed, and the drum driver 180 extends along the first direction D1 to engage with the drum unit 104. When the drum driver 180 extends along the first direction D1, the separation portion 107 provided on the coupling 106 is inserted between the movable members (the first movable member 204 and the second movable member 208), and the engaging portion 108 corresponds to the position of the driving force transmission portion 180d, so the coupling 106 can be directly engaged with the drum driver 180, and then the drum driver 180 starts to rotate along the preset rotation direction A. The engaging portion 108 is engaged with the driving force transmission portion 180d, so that the coupling 106 can receive the first force applied by the drum driver 180 and rotate synchronously with the drum driver 180 along the preset rotation direction A. The coupling 106 drives the movable member to rotate, and then the drum unit 104 rotates, thereby completing the driving action.

[0138] The other structures of the process box 100 of this embodiment are the same as those of the first embodiment and will not be described again.

[0139] Embodiment 4

[0140] Reference Fig.29 as well as Fig.30 As shown, in this embodiment, the coupling portion 108 includes a first groove section 121 and a second groove section 122 that are connected. The width of the second groove section 122 is greater than that of the first groove section 121. The second groove section 122 is closer to the photosensitive drum 105 than the first groove section 121. The width of the second groove section 122 is adapted to the width of the driving force transmitting portion 180d. When the coupling 106 is engaged with the drum driving member 180, the second groove section 122 is engaged with the driving force transmitting portion 180d to receive the driving force applied by the driving force transmitting portion 180d. At this time, the bottom wall of the second groove section 122 abuts against the surface of the driving force transmitting portion 180d to generate a certain friction force, and the direction of the force is opposite to the direction of the first force applied by the driving force transmitting portion 180d, thereby ensuring that the coupling 106 and the drum driving member 180 are stably engaged during printing.

[0141] The other structures of the process box 100 of this embodiment are the same as those of the first embodiment and will not be described again.

[0142] Embodiment 5

[0143] Reference Fig.31 as well as Fig.32 As shown, in this embodiment, different from the second embodiment, in this embodiment, there is only one coupling portion 108 on the coupling 106, the separation portion 107 includes an annular protrusion structure protruding from the second end of the coupling 106, and the coupling portion 108 is a sheet-like protrusion structure protruding from the end face of the annular protrusion structure.

[0144] In this embodiment, the separation portion 107 is an annular protrusion structure, with an outer diameter of approximately 10.9 mm, an inner diameter of 10.5 mm, and a thickness of approximately 0.2 mm. This is conducive to the separation portion 107 being inserted between the movable parts. The thickness of the annular column is uniformly set along the first direction D1, and can also be unevenly set along the first direction D1. The thickness of the annular column is unevenly set along the first direction D1, which is conducive to the separation portion 107 and the movable parts to generate friction or interference force, so that the processing box 100 and the image forming device are installed more firmly and the engagement is more stable during the printing process.

[0145] The length of the separation portion 107 along the first direction D1 is greater than or equal to the distance between the upper surface of the driving force transmission portion 180d and the upper surface of the drum driving member 180, so as to ensure that the driving force transmission portion 180d is engaged with the engagement portion 108 and is used to receive the first force applied by the driving force transmission portion 180d. Specifically, the length of the separation portion 107 along the first direction D1 is approximately 5 mm.

[0146] Preferably, the separation portion 107 has a certain width along the first direction D1, which is conducive to the engagement portion 108 receiving the first force applied by the driving force transmission portion 180d. Specifically, the engagement portion 108 is convexly formed on the end surface of the separation portion 107, so that the separation portion 107 forms a sheet-like protrusion structure in the circumference of the engagement portion 108, and the circumferential length of the sheet-like protrusion structure along the preset rotation direction A is greater than or equal to 5mm. Preferably, the height of the sheet-like protrusion structure along the first direction D1 is greater than or equal to the thickness of the driving force transmission portion 180d along the first direction D1, which is conducive to the stable engagement of the engagement portion 108 with the driving force transmission portion 180d, and is used to stably accept the first force applied by the driving force transmission portion 180d. Specifically, the height of the sheet-like protrusion structure of the separation portion 107 along the first direction D1 is greater than 0.5mm, so as to ensure that the groove structure of the engagement portion 108 is stably engaged with the driving force transmission portion 180d, and can stably accept the first force applied by the driving force transmission portion 180d.

[0147] The other structures of the process box 100 of this embodiment are the same as those of the third embodiment and will not be described again.

[0148] Embodiment 6

[0149] In this embodiment, in order to eliminate abnormal noise when the processing box 100 is matched with the drum driving member 180, a pressing portion 123 is provided at the second end of the coupling 106. When the coupling 106 extends into the assembly groove 213, the pressing portion 123 abuts against the movable part to push the movable part to move in a direction opposite to the first direction D1.

[0150] See 33 and Fig.34As shown, the pressing part 123 is a truncated cone structure formed at the middle axis position of the second end of the coupling 106. The pressing part 123 is located in the middle area of ​​the positioning matching part 109 and the separation part 107, and there is a gap between the pressing part 123 and the separation part 107. The height of the pressing part 123 is lower than the height of the separation part 107. When the drum driving member 180 moves in the direction close to the processing box 100, the first moving part 204 and the second moving part 208 abut against the end surface of the pressing part 123, and are pressed by the pressing part 123 during the relative movement. The first moving part 204 and the second moving part 208 move toward the inside of the drum driving member 180, and then the brake transmission member 207 also moves away from the processing box 100 towards the inside of the drum driving member 180 under the action of the second moving part 208. At this time, the brake transmission member 207, the first moving part 204 and the second moving part 208 are out of the brake working position, thereby reducing or eliminating the abnormal noise generated when the drum driving member 180 rotates.

[0151] The other structures of the process box 100 of this embodiment are the same as those of the third embodiment and will not be described again.

[0152] Embodiment 7

[0153] Reference Fig.35 as well as Fig.36 As shown, in this embodiment, a driving force receiving block 124 is convexly provided at the end of the coupling 106. The driving force receiving block 124 is a convex structure. Two driving force receiving blocks 124 are provided, which are respectively arranged on the separation portion 107 in a centrally symmetrical manner. Each driving force receiving block 124 is arranged corresponding to the joint portion 108. The end surface of the driving force receiving block 124 facing the direction opposite to the first direction D1 is a driving force receiving surface 125, and the driving force receiving surface 125 is an inclined surface inclined relative to the end surface of the coupling 106. The driving force receiving surface 125 is flush with the surface of the joint portion 108 facing the direction opposite to the first direction D1.

[0154] The inclined plane component 180a is also provided with a transmission inclined plane 215. When the drum driving member 180 extends along the first direction D1 to engage with the coupling 106, the pressing part 123 pushes the movable member to move in the direction opposite to the first direction D1 to reduce or eliminate the abnormal noise generated when the drum driving member 180 rotates, and the separation part 107 is inserted into the first gap 214 between the first movable member 204 and the second movable member 208, and the transmission inclined plane 215 abuts against the driving force receiving surface 125 of the driving force receiving block 124 to receive the driving force.

[0155] The other structures of the process box 100 of this embodiment are the same as those of the sixth embodiment and will not be described again.

[0156] Embodiment 8

[0157] Reference Fig.37 as well as Fig.38 As shown, in this embodiment, a conductive bearing 126 is provided at one end of the photosensitive drum 105 away from the coupling 106, and a force-applying member 128 is also provided in the processing box 100. The force-applying member 128 is used to provide a second force on the coupling 106 and / or the conductive bearing 126. The extension direction of the second force is opposite to the extension direction of the first force. The second force is a braking force, which can ensure that the photosensitive drum 105 does not rotate when the image forming device is just started, and can more easily and quickly engage with the drum driving member and rotate stably.

[0158] In a feasible implementation manner, the force applying member 128 is disposed at the conductive end of the processing box 100. Specifically, the force applying member 128 acts on the conductive bearing 126 to generate a second force on the photosensitive drum 105. The conductive bearing 126 is hollow inside, and a plurality of ribs are disposed on the circumferential inner wall of the conductive bearing 126. The processing box 100 further includes a conductive shaft pin 127, which partially passes through the through hole on the conductive side end cover 101 and is inserted into the conductive bearing 126.

[0159] In this embodiment, the force applying member 128 is a torsion spring, the coil of which is sleeved on the conductive shaft pin 127 and tightly holds the conductive shaft pin 127, and is inserted into the conductive bearing 126 together with the conductive shaft pin 127, and the arm of the torsion spring is connected to the rib of the conductive bearing 126. The torsion force of the torsion spring acts on the conductive bearing 126, and then acts on the photosensitive drum 105, thereby generating a second force on the photosensitive drum 105, so that the photosensitive drum 105 rotates stably.

[0160] In this embodiment, a force applying member 128 for providing a second force is provided on the processing box 100, which can ensure that the photosensitive drum 105 does not rotate when the image forming device is just started, and can more easily and quickly engage with the drum driving member 180 and rotate stably.

[0161] The other structures of the process box 100 of this embodiment are the same as those of the sixth embodiment and will not be described again.

[0162] Embodiment 9

[0163] Reference Fig.39 as well as Fig.40 As shown, in this embodiment, the force-applying member 128 is a torsion spring, the coil portion of the torsion spring is sleeved on the outer peripheral surface of the conductive bearing 126 and holds the conductive bearing 126, the arm portion of the torsion spring abuts against the conductive side end cover 101, the torsion spring is interference-fitted on the conductive bearing 126, the arm portion of the torsion spring is snap-fitted and fixed on the conductive side end cover 101, when the photosensitive drum 105 rotates (the conductive bearing 126 rotates synchronously), the torsion spring does not rotate with it, and the torsion force of the torsion spring acts on the conductive bearing 126, and then acts on the photosensitive drum 105, thereby generating a second force on the photosensitive drum 105, so that the photosensitive drum 105 rotates stably.

[0164] The other structures of the process box 100 of this embodiment are the same as those of the eighth embodiment and will not be described again.

[0165] Embodiment 10

[0166] Reference Fig.41 as well as Fig.42 As shown, in this embodiment, the force-applying member 128 is an annular member, and the force-applying member 128 is fixedly arranged on the end surface of the conductive bearing 126 facing the conductive side end cover 101. The force-applying member 128 can be a rubber ring / rubber ring that can be squeezed and deformed. The force-applying member 128 is located between the conductive bearing 126 and the conductive side end cover 101. The force-applying member 128 is squeezed and deformed, thereby generating a friction force between the conductive side end cover 101 and the conductive bearing 126. The friction force provides a second force acting on the photosensitive drum 105, so that the photosensitive drum 105 rotates stably.

[0167] The other structures of the process box 100 of this embodiment are the same as those of the eighth embodiment and will not be described again.

[0168] Embodiment 11

[0169] Reference Fig.43 as well as Fig.44 As shown, in this embodiment, the force-applying member 128 is a torsion spring, the coil portion of which is sleeved on the outer circumferential surface of the coupling 106 and holds the coupling 106 tightly, the torsion spring is installed on the coupling 106 with interference fit, and the arm portion of the torsion spring is snap-fitted and fixed on the driving side end cover 102. When the coupling 106 drives the photosensitive drum 105 to rotate, the torsion spring does not rotate therewith, and the torsion force of the torsion spring acts on the coupling 106, and then acts on the photosensitive drum 105, thereby generating a second force on the photosensitive drum 105, so that the photosensitive drum 105 rotates stably.

[0170] The other structures of the process box 100 of this embodiment are the same as those of the eighth embodiment and will not be described again.

[0171] Embodiment 12

[0172] Reference Figures 45 to 48 As shown, in this embodiment, the force-applying member 128 is a rubber ring or a rubber ring, and an annular groove 129 is provided on the circumferential surface of the coupling 106. The force-applying member 128 is installed in the annular groove 129. When the coupling 106 is supported in the through hole of the driving side end cover 102, the part of the force-applying member 128 protruding from the circumferential surface of the coupling 106 contacts and is squeezed by the driving side end cover 102, thereby generating a friction force between the driving side end cover 102 and the coupling 106. The friction force provides a second force acting on the photosensitive drum 105, so that the photosensitive drum 105 rotates stably.

[0173] Furthermore, the force-applying member 128 can also be arranged at the conductive end. Specifically, an annular groove 129 is provided on the circumferential surface of the conductive bearing 126 at the conductive end of the photosensitive drum 105. The force-applying member 128 is a rubber ring or a rubber ring, which is sleeved in the annular groove 129 of the conductive bearing 126 and is in contact with and squeezed by the conductive side end cover 101. The friction force between the two provides a second force acting on the photosensitive drum 105.

[0174] The above describes in detail the structure, features and effects of the utility model based on the embodiments shown in the drawings. The above is only a preferred embodiment of the utility model, but the utility model is not limited to the scope of implementation shown in the drawings. Any changes made in accordance with the concept of the utility model, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and the drawings, should be within the protection scope of the utility model.

Claims

1. A coupling of a process cartridge, wherein the process cartridge can be detachably mounted in a main assembly of an electronic imaging device, wherein the main assembly comprises a drum drive transmission unit, wherein the drum drive transmission unit comprises a drum drive member and a braking force applying assembly; wherein the drum drive member is provided with a driving force transmitting portion, wherein the coupling can receive a first force applied by the driving force transmitting portion to rotate, and wherein: The coupling further comprises a coupling portion, which is a groove structure; the groove structure of the coupling portion is engaged with the driving force transmission portion to receive the first force applied by the driving force transmission portion for rotation.

2. The coupling of the process cartridge according to claim 1, characterized in that: The drum driving member further includes a slope component and a positioning portion, and the driving force transmission portion is connected to the slope component and is located between the positioning portion and the slope component.

3. The coupling of the process cartridge according to claim 2, characterized in that: An assembly groove is provided in the drum driving member, and the braking force applying assembly includes a first movable member; the driving force transmitting member is formed in the assembly groove, and the first movable member is arranged in the assembly groove; the positioning member is formed in the assembly groove and is located at the central axis position of the drum driving member; the driving force transmitting member is symmetrically arranged on opposite sides of the center line of the positioning member.

4. The coupling of the process cartridge according to claim 3, characterized in that: The first movable member is movable in an axial direction relative to the drum driving member.

5. The coupling of the process cartridge according to claim 4, characterized in that: The drum driving member can be moved and extended by a preset distance in the axial direction.

6. The coupling of the process cartridge according to claim 5, characterized in that: The drum driving member can move in the axial direction to achieve an extension or retraction action.

7. The coupling of the process cartridge according to claim 6, characterized in that: The braking force applying assembly also includes a second movable component, the first movable component and the second movable component are engaged with each other, and the second movable component is located on the inner side of the first movable component, that is, the second movable component is closer to the positioning part of the drum driving member than the first movable component.

8. The coupling of a process cartridge according to any one of claims 1 to 7, characterized in that: A positioning fitting portion is also provided in the coupling, and when the processing box is installed on the main component, the positioning portion of the drum driving member can be inserted into the positioning fitting portion for engagement.

9. The coupling of the process cartridge according to claim 8, characterized in that: The positioning matching portion is provided with a conical chamfer.

10. The coupling of a process cartridge according to any one of claims 1 to 7, characterized in that: The coupling also includes a separation portion, and the braking force applying assembly includes a movable member, which can be moved along the axial direction relative to the drum driving member; when the processing box is installed on the main assembly, the separation portion is inserted into the movable member.

11. The coupling of the process cartridge according to claim 10, characterized in that: The movable part comprises a first movable part and a second movable part, the first movable part and the second movable part are engaged with each other; the separating part is inserted between the first movable part and the second movable part.

12. The coupling of the process cartridge according to claim 10, characterized in that: The separation portion is an annular protrusion structure, and the engagement portion is formed at the lower end of the separation portion.

13. The coupling of a process cartridge according to any one of claims 1 to 7, characterized in that: The width of the groove structure of the engaging portion is greater than or equal to the width of the driving force transmitting portion.

14. The coupling of the process cartridge according to claim 13, wherein: The groove structure of the engaging portion includes a first groove section and a second groove section, the width of the second groove section is greater than the width of the first groove section, and the width of the first groove section is adapted to the width of the driving force transmission portion.

15. The coupling of the process cartridge according to claim 14, characterized in that: There are two engaging parts, and the engaging parts are symmetrically arranged on the coupling.

16. The coupling of a process cartridge according to any one of claims 1 to 7, characterized in that: The engaging portion is provided with a bottom wall, and when the engaging portion is engaged with the driving force transmitting portion, the bottom wall contacts at least a portion of the driving force transmitting portion to generate a force in a direction opposite to the first force applied by the driving force transmitting portion.

17. The coupling of the process cartridge according to claim 16, characterized in that: When the bottom wall is engaged with the driving force transmission part, the bottom wall abuts against a surface of the driving force transmission part to generate a force in a direction opposite to the first acting force.

18. A processing box, characterized in that: The process box includes a coupling of a process box as described in any one of claims 1-17.

Images