Drum unit and processing box

Abstract

The utility model discloses a drum unit which comprises a drum frame, a photosensitive drum and a drum coupling, the photosensitive drum is used for receiving consumables to generate electrostatic latent images, the drum coupling is arranged at one end of the photosensitive drum and used for receiving driving force from imaging equipment and transmitting the driving force to the photosensitive drum, and the drum coupling comprises a supporting part and an acting part. The acting part is arranged on the side, away from the photosensitive drum, of the supporting part, the acting part is provided with a movable acting block capable of moving in the circumferential direction, and in the process that the processing box is installed on the imaging equipment, the movable component abuts against the movable acting block, so that the movable component generates driving force on the drum coupling to drive the photosensitive drum to rotate. The processing box comprises the drum unit. According to the utility model, the alignment and joint processes are simple and convenient, and the driving force and the braking force can be ensured to be stable.

Description

[0001] This application is a divisional application. The application number of the original application is 2023222233569, the original application date is August 17, 2023, and the invention name of the original application is “A drum unit and a processing box”. The entire contents of the original application are incorporated into this application by reference. Technical Field

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

[0003] Electrophotographic imaging devices are increasingly used in human production and life. Such devices refer to devices that form images on recording materials by using electrophotographic imaging methods. Examples of such devices include copiers, fax machines, printers (laser beam printers, LED printers, etc.) and corresponding multi-function printers, etc. The process cartridge can be removed from the main assembly of the imaging device (equipment main assembly). When the consumables in the process cartridge are used up, the process cartridge needs to be replaced.

[0004] There is a type of drive transmission unit disclosed in Chinese patent CN202080021684.7, which is engaged with a drum coupling through multiple components to drive and brake it. However, most of the existing drum couplings adapted to this type of drive transmission unit are one-piece molded parts, which only rely on their own structure to guide the multiple components of the drive transmission unit to engage with their preset positions respectively. Multiple guiding surfaces need to be set on this type of drum coupling, and the alignment engagement is indirectly achieved by guiding the translation and rotation of different components on the drive transmission unit. The guiding process is relatively complicated, and the degree of structural adaptation between the drum coupling and the drive transmission unit is relatively high. In the state of the engagement process, the engagement is completed, otherwise it will affect the stable transmission process of the drive. In addition, the structure of this type of drum coupling itself is also relatively complex, so the manufacturing accuracy and process requirements of the drum coupling are also high, and the design and manufacturing difficulty are relatively high.

[0005] Therefore, a technical solution to the above problems is needed. Utility Model Content

[0006] In order to solve the technical problems existing in the prior art, the purpose of the utility model is to provide a drum unit to solve the above technical problems.

[0007] In order to achieve the purpose, the utility model adopts the following technical solutions:

[0008] A drum unit is used to form a processing box after cooperating with a developing unit and installed in an imaging device, wherein the imaging device is provided with a drum drive transmission unit, the drum drive transmission unit is provided with a moving part, and the drum unit comprises:

[0009] Drum frame;

[0010] A photosensitive drum, rotatably supported by the drum frame, for receiving consumables to generate an electrostatic latent image;

[0011] A drum coupling, for receiving a driving force from the imaging device and transmitting it to the photosensitive drum, and the drum coupling comprises:

[0012] a supporting portion connected to the photosensitive drum; and

[0013] An action portion is arranged on a side of the support portion away from the photosensitive drum, and the action portion is provided with a movable action block which can move circumferentially;

[0014] When the processing box is installed in the imaging device, the moving component abuts against the movable action block, so that the moving component generates a driving force with the drum coupling to drive the photosensitive drum to rotate.

[0015] Preferably, the movable acting block is provided with a driving receiving surface for engaging with the moving component so that the movable acting block receives the driving force of the moving component.

[0016] Preferably, the drive receiving surface is located on the movable acting block on the upstream side in the rotation direction of the drum coupling.

[0017] Preferably, the drive receiving surface is an inclined surface, and the drive receiving surface extends on the movable action block from upstream to downstream in the rotation direction of the drum coupling toward a side away from the photosensitive drum.

[0018] Preferably, the drum coupling further comprises an abutment surface, and the movable action block is provided with a drive transmission limiting surface for abutting against the abutment surface.

[0019] Preferably, the drive transmission limiting surface is located on the downstream side in the rotation direction of the drum coupling.

[0020] Preferably, the action portion further comprises a spiral bevel, which is located on the upstream side of the movable action block in the rotation direction of the drum coupling, and is used to guide the moving component so that the moving component moves to a position abutting against the movable action block.

[0021] Preferably, the spiral slope extends from upstream to downstream in the rotation direction of the drum coupling toward a side close to the photosensitive drum.

[0022] Preferably, the action portion further comprises a shield portion for blocking the axial movement of the moving component.

[0023] Preferably, the baffle portion and the spiral slope are continuously arranged in the rotation direction of the drum coupling.

[0024] Preferably, the shield portion and the portion of the spiral slope that is opposite to the drum drive transmission unit in the axial direction serve as abutment surfaces that block the movable action block.

[0025] Preferably, the acting portion further includes a braking force receiving portion for engaging the moving member so that the drum unit receives the braking force of the drum drive transmission unit.

[0026] Preferably, the braking force receiving portion extends from upstream to downstream in the rotation direction of the drum coupling toward a side away from the photosensitive drum.

[0027] Preferably, the drum coupling also includes an elastic engaging portion, which is arranged between the supporting portion and the movable action block and is configured to have an elastic force on the movable action block to reset after movement, so that the movable component can engage with the braking force receiving portion under the action of the elastic force.

[0028] Preferably, the action portion is provided with an opening, the movable action block is installed in the opening and can move circumferentially, and one end of the movable action block is connected to the supporting portion through the elastic joint portion in the action portion, and the movable action block can overcome the elastic force of the elastic joint portion and move circumferentially relative to the supporting portion within the range of the opening.

[0029] Preferably, the movable action block is provided with a accommodating recess at one end in the action part, the supporting part includes a supporting column and an abutting part, and the elastic engaging part is a torsion spring, which is sleeved on the supporting column, and one end abuts against the abutting part, and the other end abuts in the accommodating recess, so that there is an elastic force in the circumferential direction between the supporting part and the movable action block.

[0030] Preferably, the drum coupling further includes a circular hole portion for engaging with a reinforced cylindrical portion provided at the drum drive transmission unit and positioning axes of each other.

[0031] Preferably, the movable part includes a first movable part and a second movable part, the first movable part is provided with a stop recess, the second movable part is provided with a stop protrusion, the stop recess is engaged with the stop protrusion so that the first movable part and the second movable part can rotate as a whole, wherein the first movable part or the second movable part abuts against the movable action block.

[0032] Also included is a process cartridge comprising the above-mentioned drum unit.

[0033] The drum unit and processing box in the utility model, through the rotation of the drum drive transmission unit, make the movable component abut against the active action block of the drum coupling, the active action block moves and abuts against the abutment surface, so that the drum drive transmission unit generates a driving force for the drum coupling, drives the photosensitive drum to rotate, the drum coupling structure is simple in shape, and completes the engagement process with the drum drive transmission unit through its own axial feeding and the rotation action of the main component, so that the alignment and engagement process are relatively simple; a braking force receiving part is provided on the drum coupling to engage with the drum drive transmission unit to receive the braking force, and the action of the active action block and the elastic engagement part also helps to ensure that the driving force and the braking force are stably realized, so as to ensure that the driving force transmission process between the drive transmission unit and the drum coupling is stable to avoid abnormal situations such as disengagement; and the specifications and dimensions of the active action block and the elastic engagement part are easy to adjust, so as to adapt to the drum drive transmission unit structure of different imaging devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 is a schematic diagram of an imaging device.

[0036] Figure 2 It is a schematic diagram of the three-dimensional structure of the drum drive transmission unit of the imaging device.

[0037] Figure 3 It is a schematic diagram of the exploded three-dimensional structure of the drum drive transmission unit of the imaging device.

[0038] Figure 4 It is a three-dimensional diagram of the first moving component of the utility model.

[0039] Figure 5 It is a three-dimensional diagram of the second moving component of the utility model.

[0040] Figure 6 It is a stereoscopic diagram of the drum drive coupling of the utility model.

[0041] Figure 7 It is a three-dimensional structural schematic diagram of the processing box of the utility model.

[0042] Figure 8 It is an exploded schematic diagram of the three-dimensional structure of the processing box of the utility model.

[0043] Fig. 9 It is a three-dimensional structural schematic diagram of a drum coupling according to a first embodiment of the utility model.

[0044] Fig.10 It is a schematic exploded view of the three-dimensional structure of a drum coupling according to a first embodiment of the utility model.

[0045] Fig.11 It is a schematic diagram of the connection between the drive transmission unit and the drum coupling of the imaging device in the first embodiment of the utility model;

[0046] Fig.12 It is a schematic diagram of the three-dimensional structure of the drive transmission unit and the drum coupling in the first embodiment of the utility model.

[0047] Fig.13 It is a schematic diagram of the three-dimensional structure of the drive transmission unit and the drum coupling in the first embodiment of the utility model.

[0048] Fig.14 It is a three-dimensional structural schematic diagram of the driving transmission unit and the drum coupling in the first embodiment of the utility model in the connection state;

[0049] Fig.15 This is a schematic diagram of the partial structure of the drive transmission unit and the drum coupling of the first embodiment of the utility model. Figure 1 .

[0050] Fig.16 This is a schematic diagram of the partial structure of the drive transmission unit and the drum coupling of the first embodiment of the utility model. Figure 2 .

[0051] Fig.17 This is a schematic diagram of the partial structure of the drive transmission unit and the drum coupling of the first embodiment of the utility model. Figure 3 .

[0052] Fig.18 This is a schematic diagram of the partial structure of the drive transmission unit and the drum coupling of the first embodiment of the utility model. Figure 4 .

[0053] Fig.19 This is a schematic diagram of the local structure of the drive transmission unit and the drum coupling in the first embodiment of the utility model. Figure 5 .

[0054] Fig. 20 It is a three-dimensional structural schematic diagram of the drum coupling of the second embodiment of the utility model.

[0055] Fig.21 It is a schematic diagram of the exploded three-dimensional structure of the drum coupling of the second embodiment of the utility model.

[0056] Fig. 22 It is a three-dimensional structural schematic diagram of the drum coupling of the second embodiment of the utility model with some structures omitted.

[0057] Fig.23 It is a cross-sectional view of the drum coupling of the second embodiment of the utility model.

[0058] Fig.24 It is a three-dimensional structural schematic diagram of the movable action block of the drum coupling in the second embodiment of the utility model.

[0059] Fig.25 It is a front view of the drum coupling of the second embodiment of the utility model.

[0060] Fig.26 It is a rear view of the drum coupling of the second embodiment of the utility model.

[0061] Fig. 27 It is a three-dimensional structural schematic diagram of the cooperation between the drive transmission unit and the drum coupling in the second embodiment of the utility model.

[0062] Fig.28 This is a schematic diagram of the three-dimensional structure of the second moving member and the drum coupling in the second embodiment of the utility model. Figure 1 .

[0063] Fig.29 This is a schematic diagram of the three-dimensional structure of the second moving member and the drum coupling in the second embodiment of the utility model. Figure 2 .

[0064] Fig.30 This is a schematic diagram of the three-dimensional structure of the second moving member and the drum coupling in the second embodiment of the utility model. Figure 3 .

[0065] Fig.31 This is the second embodiment of the utility model. Fig. 27 Front view of the drum coupling in the shown position.

[0066] Fig.32 This is the second embodiment of the utility model. Fig. 27 Front view of the drum drive transmission unit in the shown state.

[0067] Fig.33 This is a schematic diagram of the three-dimensional structure of the second moving member and the drum coupling in the second embodiment of the utility model. Figure 4 .

[0068] Fig.34 This is a schematic diagram of the three-dimensional structure cross section of the drive transmission unit and the drum coupling of the second embodiment of the utility model. Figure 5 .

[0069] Fig.35 This is a schematic diagram of the three-dimensional structure of the drive transmission unit and the drum coupling in the second embodiment of the utility model. Figure 6 .

[0070] Fig.36 This is a schematic diagram of the three-dimensional structure of the second moving member and the drum coupling in the second embodiment of the utility model. Figure 7 .

[0071] Fig.37 This is a schematic diagram of the three-dimensional structure of the second moving member and the drum coupling in the second embodiment of the utility model. Figure 8 .

[0072] Fig.38 This is a schematic diagram of the three-dimensional structure of the second moving member and the drum coupling in the second embodiment of the utility model. Figure 9 . DETAILED DESCRIPTION

[0073] The utility model is further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0074] It should be noted that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0075] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0076] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0077] In the above description, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0078] like Figure 1 The figure is a schematic diagram of the overall structure of the imaging device of the present invention.

[0079] like Figures 1 to 8 As shown, the imaging device 10 can be a copier, a fax machine, a printer (laser beam printer, LED printer, etc.), their multi-function printers, etc. The present invention is described by taking a laser beam printer as an example. A detachable processing box 100 is installed on the main component (device main component) of the imaging device 10, and consumables (such as developer) are installed in the processing box 100, so that the imaging device 10 can use the consumables in the processing box 100 for imaging. When the consumables in the processing box 100 are used up, it is necessary to remove the old processing box 100 and then install a new processing box 100. In the present invention, the detachable drum unit 109 can also be. When replacing the drum unit, the drum unit 109 on the original processing box is removed, and then the new drum unit 109 is installed on the processing box 100, and then the processing box 100 is reinstalled on the main component.

[0080] refer to Figure 1 In the present invention, the imaging device 10 is a laser beam printer, and the processing box 100 is installed on the tray ( Figure 1 ), a tray carrying a processing box 100 is installed on the imaging device 10. A plurality of processing boxes 100 can be installed on the main component of the imaging device 10. Preferably, four processing boxes 100 can be installed on the main component of the imaging device 10, and the four processing boxes 100 can be of the same color or different colors. Preferably, the four processing boxes 100 are of four different colors (black, red, yellow, blue), respectively, and the four processing boxes 100 are arranged basically horizontally. When installed in the imaging device 10, the processing box 100 is connected to the imaging device 10 by driving, and can receive the rotational driving force of the imaging device 10, so that the processing box 100 can use consumables for imaging, for example, the imaging device 10 can print a color image on a medium (such as copy paper, photo paper).

[0081] The imaging device 10 has a main assembly and a front door 11. The main assembly includes a tray, an intermediate transfer belt 12, a drum drive transmission unit 180a, and a developer drive transmission unit 185. It is understandable that if the processing box 100 does not have a developer unit 108, the imaging device 10 does not have a developer drive transmission unit 185. When the processing box 100 is installed on the imaging device 10, the imaging device 10 can perform a printing operation. When the imaging device 10 receives a print command, the consumables in the processing box 100 will reach the intermediate transfer belt 12, and then the consumables on the intermediate transfer belt 12 will be transferred to the medium through a secondary transfer device (not shown in the figure), and then through a fixing device (not shown in the figure), the image to be printed will appear on the medium.

[0082] The front door 11 is linked with the drum drive transmission unit 180a and the developer drive transmission unit 185 through a connecting rod mechanism (not shown). When the front door 11 is closed, the front door 11 moves along the Figure 1 As the black arrow in the figure moves, during the process of closing the front door 11, the drum drive transmission unit 180a and the developer drive transmission unit 185 extend and respectively engage with the drum unit 109 and the developer unit 108 provided in the process box 100, thereby achieving the installation of the main component and the process box 100 in place. When the front door 11 is opened, the drum drive transmission unit 180a and the developer drive transmission unit 185 retract and disengage from the drum unit 109 and the developer unit 108 of the process box 100, and then the tray and the process box 100 can be smoothly taken out from the main component. In this way, on the one hand, the drum drive transmission unit 180a and the developer drive coupling 185 can be better connected with the drum coupling 143 and the developer coupling component of the process box, respectively, so as to drive the developer unit and the drum unit to develop. On the other hand, the insertion / removal of the tray is prevented from being hindered.

[0083] In order to better describe the imaging device and the processing box, a three-dimensional rectangular coordinate system XYZ coordinate system is established. The X-axis, Y-axis, and Z-axis are perpendicular to each other. The plumb bob direction of the imaging device 10 during normal use is the -Z-axis direction, the direction directly above is the +Z-axis direction, the direction from the front door 11 to the main component is the +X-axis direction, and the direction from the main component to the front door 11 is the -X-axis direction. The direction in which the drum drive transmission unit 180a and the developer drive transmission unit 185 extend is the +Y-axis direction, and the direction in which they retract is the -Y-axis direction.

[0084] like Figures 3 to 8As shown, the drum drive transmission unit 180a receives the driving force from the motor of the imaging device 10, and the drum drive transmission unit 180a is included in the drum drive coupling 180. Specifically, the drum drive coupling 180 is formed into a cylindrical shape, and a braking component 206, a power transmission component 207 connected to the braking component 206 to transmit the braking force, a first movable component 204 and a second movable component 208, and an engaging spring 211 and a drum drive coupling spring 210 that are coaxially arranged and generate a pushing force along the axial direction of the drum drive coupling 180 are arranged inside the cylinder. The axial direction of the drum drive coupling 180 is also the Y-axis direction in the imaging device.

[0085] The first moving part 204 and the second moving part 208 are collectively referred to as moving parts. Furthermore, the first moving part 204 and the second moving part 208 can also be individually referred to as moving parts. In the present embodiment, the first movable member 204 includes a cylindrical portion 204d, a first flange portion 204a and a first coupling engaging portion 204b protruding like a claw and engaging with the drum coupling 143, the cylindrical portion 204d is provided with a stop recess 204c engaging with a stop protrusion 208c of the second movable member 208 (this will be described below), the first coupling engaging portion 204b includes a first inclined surface 204f used as a part of squeezing the drum coupling 143; the second movable member 208 includes a second flange portion 208a, a second coupling engaging portion 208b protruding in the form of a claw and engaging with the drum coupling 143, and a stop protrusion 208c engaging with the stop recess 204c of the first movable member 204, and since the second movable member 208 is prevented from rotating relative to the first movable member 204, the first movable member 204 and the second movable member 208 rotate integrally with each other. In addition, the first moving member 204 and the second moving member 208 are connected so as to move integrally in the axial direction as well. Therefore, the first moving member 204 and the second moving member 208 may be simply collectively referred to as moving members (204, 208).

[0086] The power transmission component 207 includes a third flange portion 207a and a shaft portion 207b. The third flange portion 207a is provided with a protrusion 207e, and the protrusion 207e is used to engage with the protrusion 204e provided on the first flange portion 204a of the first movable component 204. In the axial direction, when the power transmission component 207 is at the protrusion 207e relative to the first movable component 204 (see Figure 3 , Figure 4 and Figure 5) is in a position where the protrusion 207e is engaged with the protrusion 204e of the first movable member 204, the first movable member 204 and the second movable member 208 rotate integrally; on the other hand, when the power transmission member 207 is in a position where the protrusion 207e is not engaged with the protrusion 204e relative to the first movable member 204 in the axial direction, the power transmission member 207 does not restrict the rotation of the first engaging member 204 and the second engaging member 208, that is, the first movable member 204 and the second movable member 208 can rotate relative to the power transmission member 207. The shaft portion 207b has a non-circular cross section and is engaged with an engaging hole 206c of a brake member 206 to be described below, so that the power transmission member 207 and the brake member 206 rotate integrally. The braking component 206 is divided into two parts, including a fixed side and a rotating side, which are integrated in the axial direction. The rotating side rotates when receiving the driving force from the imaging device 10, and also receives the braking force (load) in the rotation direction from the fixed side when rotating. The moving parts (204, 208) are connected to the braking component 206 through the power transmission component 207 as described above. Therefore, the moving parts (204, 208) can receive the rotational load (braking force) generated by the braking component 206.

[0087] The engaging spring 211 is a compression coil spring and is arranged to be clamped and compressed between the end face 206d of the braking component 206 and the first flange portion 204a of the first movable component 204, so that the engaging spring 211 applies a repulsive force (pushing force, elastic force) to each of the end face 206d of the braking component 206 and the first flange portion 204a of the first movable component 204; the drum drive coupling spring 210 is also a compression coil spring and is arranged to be clamped and compressed between the end face 206d of the braking component 206 and the flange portion 207a of the power transmission component 207, so that the drum drive coupling spring 210 applies a repulsive force (pushing force, elastic force) to each of the end face 206d of the braking component 206 and the flange portion 207a of the power transmission component 207. The first flange portion 204 a of the first moving member 204 receives the repulsive force of the engagement spring 211 , while the power transmission member 207 receives the repulsive force of the drum drive coupling spring 210 .

[0088] When the moving parts (204, 208) are subjected to a force in the axial direction, the moving parts (204, 208) are moved in the axial direction and retracted into the drum drive coupling 180, and the engagement spring 211 is compressed. At this time, the moving parts (204, 208) are moved in the axial direction relative to the power transmission part 207, and the protrusion 207e of the power transmission part 207 is disengaged from the protrusion 204e of the first moving part 204, that is, the moving parts (204, 208) are separated from the power transmission part 207. If the power transmission part 207 is subjected to a force in the rotational direction at this time, the moving parts (204, 208) can rotate relative to the power transmission part 207 without receiving the rotational load generated by the brake part 206. That is, by retracting the moving parts (204, 208) in the axial direction, the moving parts (204, 208) can be moved from a position where the brake part 206 receives a rotational load (braking force) during rotation to a position where the rotational load is not received during rotation.

[0089] Among them, the drum drive coupling 180 includes a drive transmission part 180d arranged in a circumferential direction, and the drive transmission part 180d is used to engage with the drum coupling 143 to transmit the driving force. Specifically, in the present embodiment, the drum drive coupling 180 has a drive transmission part 180d at each of two positions separated from each other by 180 degrees in the circumferential direction, and the drive transmission part 180d includes a first drive transmission surface 1802, a second drive transmission surface 1803 and a third drive transmission surface 1804. The drum drive coupling 180 is provided with a through hole 180f connected in the axial direction. The drum drive coupling 180 has an axially symmetrical shape, and the through hole 180f connected in the axial direction is arranged at a portion other than the drive transmission part 180d. Through the through hole 180f, the first coupling engagement part 204b of the first movable component 204 and the second coupling engagement part 208b of the second movable component 208 are connected in the surface. Exposed in the direction of the coupling 143, the first coupling engagement portion 204b and the second coupling engagement portion 208b can rotate within a predetermined range of the through hole 180f; and the drum drive coupling 180 is also provided with a reinforced cylindrical portion 180e to increase the rigidity of the drive transmission portion 180d. Preferably, the reinforced cylindrical portion 180e is arranged in the middle part of the through hole 180f, and a connecting frame 189 is also arranged between the drive transmission portion 180d and the reinforced cylindrical portion 180e to fix the reinforced cylindrical portion 180e in the through hole 180f of the drum drive coupling 180. The connecting frame 189 is arranged on the periphery of the reinforced cylindrical portion 180e, and the connecting frame 189 can move integrally with the drum drive coupling 180.

[0090] Also, the drum drive coupling 180 is a unit for rotationally driving the drum coupling 143 on the drum unit 109 by being connected (engaged) with the drum coupling 143 .

[0091] Reference 7. Figure 8 A process box 100 is provided, wherein consumables (e.g., toner) are contained in the process box 100. The process box 100 may also be referred to as a "consumable box", "box", "toner container", "powder box", etc. The process box 100 includes a developing unit 108 and a drum unit 109, wherein the developing unit 108 includes a developing roller 106, a toner feeding roller (not shown in the figure), a developing scraper (not shown in the figure), a developing unit frame 125, etc. Specifically, in the present embodiment, the developing unit frame 125 includes a toner containing portion (not shown in the figure) for containing toner supplied to the developing roller 106. In addition, the developing frame 125 rotatably supports the developing roller 106 and the toner feeding roller (not shown in the figure) through a driving side bearing 126 and a non-driving side bearing 127, and holds the developing scraper, which is used to adjust the layer thickness of the toner on the circumferential surface of the developing roller 106. The developing unit 108 also includes a developing coupling 132 for receiving a driving force from the imaging device. The developing coupling 132 is arranged on a side close to the developing drive transfer unit 185 in the imaging device 10. The developing coupling 132 receives the driving force through the developing drive transfer unit 185, so that the developing roller 106 and the colorant feeding roller rotate to supply the colorant.

[0092] The drum unit 109 includes a photosensitive drum 104, a charging roller, and a drum frame 105. The photosensitive drum 104 is combined with a drum coupling 143. The photosensitive drum 111 is rotatably supported around its axis by being provided at both ends in the longitudinal direction of the process cartridge 100. The drum coupling 143 is provided near one end in the axial direction of the photosensitive drum 104. As described above, the drum coupling 143 is engaged with the driving coupling 180 of the drum drive transmission unit 180a to receive the driving force from the image forming apparatus 10 to perform the developing work. Therefore, among the opposite sides in the axial direction of the photosensitive drum, the side where the drum coupling 143 is provided is the driving side, and the opposite side thereof is the non-driving side. The photosensitive drum 104 and the drum coupling 143 are rotatably supported by a driving side cover member 116 and a non-driving side cover member 117 at opposite ends in the axial direction, and rotatably supported drum supporting holes 116b and 117b are respectively provided on the driving side cover member 116 and the non-driving side cover member 117.

[0093] Moreover, on the process cartridge 100, the charging roller is supported by the drum frame 105 in a manner of contacting the photosensitive drum 104 so that it can be driven to rotate by the photosensitive drum 104. The developing unit 108 is connected to the drum unit 109 by a driving side cover member 116 and a non-driving side cover member 117 arranged in the axial direction of the process cartridge 100. In the axial direction, the driving side cover member 116 is provided with a developing unit support hole 116a that swingably supports the developing unit 108, and in the axial corresponding position, the non-driving side cover member 117 is also provided with a developing unit support hole 117a that swingably supports the developing unit 108.

[0094] Next, the cooperative driving of the drum coupling 143 in the drum unit 190 and the image forming apparatus 10 will be described.

[0095] Embodiment 1

[0096] like Figures 9 to 19 As shown, the drum coupling 143 is connected to one end 104 of the photosensitive drum on the process cartridge 100. When the process cartridge 100 is installed in the imaging device 10, the drum drive transmission unit 180a is engaged with the drum coupling 143. When the drum drive transmission unit 180a receives the driving force from the imaging device 10, it drives the drum coupling 143 to drive the photosensitive drum 104 to rotate in the process cartridge 100. Figures 9 to 19 In the embodiment, the drum coupling 143 engages with the drum drive transmission unit 180a along the direction of arrow M1, and moves away from the drum drive transmission unit 180a when moving along the direction of arrow M2.

[0097] The drum coupling 143 includes an acting portion 143a, a supporting portion 143b, and an elastic engaging portion 143c.

[0098] Among them, the action part 143a is provided with a limiting protrusion part 143e at one end close to the photosensitive drum 104 for limiting the axial movement of the action part 143a, and the supporting part 143b is provided with a limiting recessed part 143f which cooperates with the limiting protrusion part 143e. The limiting protrusion part 143e cooperates with the limiting recessed part 143f, so that the action part 143a is installed on the supporting part 143b and can be limited by the limiting protrusion part 143e and the limiting recessed part 143f. Specifically, in this embodiment, the action portion 143a and the support portion 143b are both formed into a cylindrical shape, the support portion 143b is used to connect with the photosensitive drum 104, the action portion 143a is radially provided with a limiting protrusion 143e for limiting the axial movement of the action portion 143a at one end close to the photosensitive drum 104, the side wall of the support portion 143b is provided with a limiting recess 143f that cooperates with the limiting protrusion 143e, the diameter of the support portion 143b is larger than the diameter of the action portion 143a, the support portion 143b is partially penetrated inside the action portion 143a, the limiting protrusion 143e cooperates with the limiting recess 143f, and the size of the limiting recess 143f in the axial direction is larger than the size of the limiting protrusion 143e in the axial direction. When the action portion 143a is subjected to an axial force, the limiting protrusion 143e moves axially relative to the limiting recess 143f, so that the action portion 143a moves axially relative to the support portion 143b. Preferably, the limiting protrusion 143e on the action part 143a and the limiting recess 143f on the support part 143b are arranged at intervals along the cylindrical circumference, and the number of both is at least one, and the number of both is the same. Optionally, in some other embodiments, the limiting recess 143f can also be provided on the action part 143a, and the limiting protrusion 143e can be provided on the support part 143b, which is not limited here.

[0099] Furthermore, the elastic engaging portion 143c is provided between the action portion 143a and the support portion 143b. One end of the elastic engaging portion 143c abuts against the action portion 143a, and the other end abuts against the support portion 143b. The elastic engaging portion 143c can provide an elastic force in the axial direction between the action portion 143a and the support portion 143b, so that the action portion 143a and the limiting protrusion portion 143e are relatively fixed by the elastic force of the elastic engaging portion 143c. Specifically, in the present embodiment, the elastic engaging portion 143c is provided as a spring structure, and its elastic force is greater than the aforementioned drum drive coupling spring 210 and the engaging spring 211. The elastic engaging portion 143c is accommodated inside the support portion 143b, and its two ends abut against the action portion 143a and the photosensitive drum end 104b, respectively, to provide elastic force to the action portion 143a and the support portion 143b. When the action portion 143a is subjected to the following conditions: Fig. 9When a force in the direction of arrow M2 is applied and the force is greater than the elastic force of the elastic engaging portion 143 c , the elastic engaging portion 143 c moves along the direction of arrow M2 .

[0100] In addition, the acting portion 143a further includes a contact end 143d formed as a protruding portion at one end in the axial direction, and the acting portion 143a is an axisymmetric structure on the drum coupling 143, and the acting portion 143a is provided with a first acting portion and a second acting portion at a position closer to the photosensitive drum 104 than the contact end 143d. When the process cartridge is installed in the image forming apparatus, the first acting portion and the second acting portion can be engaged with the drum drive transmission unit, so that the coupling can be driven by the drum drive transmission unit. Specifically, in the present embodiment, the number of the action parts is two and they are symmetrically distributed. The first action part and the second action part of the action part 143a are integrally formed and respectively located on the same action part 143a, and the first action part and the second action part are located on opposite sides of the action part 143a in the circumferential direction. The first action part includes a first drive engagement surface 1432 engaged with the first drive transmission surface 1802 on the drum drive coupling 180, a second drive engagement surface 1433 engaged with the second drive transmission surface 1803, and a third drive engagement surface 1434 engaged with the third drive transmission surface 1804; the second action part includes a drive transmission limiting surface 1435 engaged with the first coupling engagement part 204b. Optionally, in some other embodiments, the number of the action parts 143 can also be single, or the number can be adjusted according to the structure of the drum drive transmission unit 180a. In some other embodiments, the first action part and the second action part can also be respectively arranged on two different action parts 143a, and there is no specific limitation on this.

[0101] When the user opens the front door to replace the process cartridge 100, the front door 11 of the imaging device 10 is closed, and the linkage mechanism (not shown in the figure) provided in the imaging device 10 is released from interlock with the front door 11, and the drum drive transmission unit 180a is axially telescopically moved in the Y-axis direction by the linkage connected to the front door 11. When the process cartridge 100 is mounted on the tray and placed in the main body of the imaging device 10 and the front door 11 is closed, the linkage disappears, and the drum drive coupling 180, the first movable member 204, the second movable member 208, and the power transmission member 207 are moved in the direction close to the process cartridge 100 by the action of the drum drive coupling spring 210 and the engagement spring 211. At this time, the drum coupling 143 of the process cartridge 100 may interfere with the drum drive transmission unit 180a, and the drum drive coupling 180 and the drum coupling 143 may not be normally engaged.

[0102] In order to make the drum coupling 143 and the main component side drum drive coupling 180 in a normal engagement state, the drum drive transmission unit 180a needs to be further rotated from the above-mentioned interference state. That is, the driving process of the drum drive transmission unit 180a must be promoted until the drum drive coupling 180 on the main component side is engaged with the drum coupling 143.

[0103] Next, the drum coupling 143 and the drum drive transmission unit 180a are in different phases and are transformed into a normal engagement state in different engagement modes, wherein it is assumed that the drum drive transmission unit 180a receives the driving force from the imaging device motor along the direction as shown in FIG. Fig.14 The rotation direction A shown in FIG.

[0104] The first mode of engagement, such as Fig.14 , Fig.15 As shown, when the front door 11 is closed, the contact end 143d contacts the first moving member 204. Specifically, in this embodiment, the drum drive transmission unit 180a is moved along the Fig.14 When extended in the direction of the arrow M2 shown in the figure, the contact end 143d of the drum coupling 143 contacts the movable parts 204 and 208. Preferably, the contact end 143d contacts the end face 204g of the first coupling engaging part 204b. Since the drum drive transmission unit 180a is provided with a drive coupling spring 210 and an engaging spring 211, and the drum coupling 143 is provided with an elastic engaging part 143c, the two are in a mutually squeezed state. At this time, the drive coupling spring 210, the engaging spring 211 and the elastic engaging part 143c are all in a compressed state, so that the first movable part 204 moves toward the M1 direction in the drum drive transmission unit 180a, and the action part 143a moves toward the M2 direction on the drum coupling 143.

[0105] When the drum drive transmission unit 180a receives the driving force from the motor of the imaging device 10 and rotates along the rotation direction A, the drum drive transmission unit 180a rotates in the direction A relative to the drum coupling 143, and the relative position of the contact end 143d moves from contact with the end face 204g of the coupling part 204b to between the drive transmission part 180d of the drum drive coupling 180 and the coupling part 204b of the first movable part 204. Specifically, due to the existence of the second drive engagement surface 1803 and the elastic force of the elastic engagement portion 143c being greater than the elastic force of the drum drive coupling spring 210 and the engagement spring 211, the action portion 143a moves along the M1 direction, and the two side surfaces of the contact end 143d contact the drive transmission portion 180d and the engagement portion 204b of the first movable member 204 respectively, and under the action of the elastic engagement portion 143c, the contact end 143d applies an action force along the normal direction of the side surface to the first movable member 204, and the first movable member 204 gradually moves away from the drive transmission portion 180d of the drum drive coupling 180 in the rotation direction A, and at the same time, the first movable member 204 further moves along the M1 direction. At this time, the first movable member 204 and the power transmission member 207 are in a disengaged state, and the first movable member 204 and the second movable member 208 do not receive the rotational power and load action from the brake member 206.

[0106] As the drum drive transmission unit 180a further rotates in the rotation direction A, the action portion 143a and the first movable member 204 further move in the M1 direction until the first drive engagement surface 1432 begins to contact the first drive transmission surface 1802, and at the same time, the drive transmission limiting surface 1435 begins to contact the first coupling engagement portion 204b of the first movable member 204. Since the first drive engagement surface 1432 and the drive transmission limiting surface 1435 are arranged to be inclined toward each other in the M2 direction, the first movable member 204 begins to move in the opposite direction of M2 and in the M1 direction at this time. Until the third drive engagement surface 1434 is fully engaged with the third drive transmission surface 1804, and at the same time, the engagement portion 204b is also fully engaged with the drive transmission limiting surface 1435.

[0107] like Fig.16 , Fig.17As shown, it can be seen from the figure that in the state of completed engagement, the first drive transmission surface 1802 is engaged with the first drive engagement surface 1432, the second drive transmission surface 1803 is engaged with the second drive engagement surface 1433, the third drive transmission surface 1804 is engaged with the third drive engagement surface 1434, the drive transmission limiting surface 1435 is engaged with the first coupling engagement portion 204b, and the drum drive transmission unit 180a drives the drum coupling 143 to rotate in the rotation direction A through the drive transmission portion 180d, and at this time, the first movable component 204 resumes engagement with the power transmission component 207 in the axial direction, and the movable components 204 and 208 receive the load from the braking component 206, so that the driving force can be transmitted between the drum coupling 143 and the drum drive coupling 180, thereby driving the photosensitive drum 104 to rotate.

[0108] The second engagement mode, Fig.18 As shown, after the front door 11 is closed, the action portion 143a enters between the first inclined surface 204f of the first movable member 204 and the drive transmission portion 180d of the drum drive coupling 180 along the M2 direction. At this time, the drum coupling 143 and the drum drive transmission unit 180a are both in a squeezed state. As the drum drive transmission unit 180a receives the driving force of the imaging device 10 and rotates along the rotation direction A, the contact end 143d gradually approaches the first inclined surface 204f. When the two begin to contact each other, the action portion 143a and the first movable member 204 receive the axial squeezing force respectively, so that the first movable member 204 moves toward the M1 direction, and the action portion moves toward the M2 direction. At this time, the first movable member 204 and the power transmission member 207 are transformed into a disengaged state. As the drum drive transmission unit 180a rotates, the contact position between the contact end 143d and the first inclined surface 204f continues to change, and the contact position gradually approaches the end surface 204g of the engagement portion 204b in the axial direction. As the contact position changes, the first movable member 204 also gradually moves toward the M2 direction. Until the contact position between the contact end 143d and the first movable member 204 transitions from the first inclined surface 204f to the end surface 204g, at this time, the relative position of the drum coupling 143 and the drum drive transmission unit 180a is converted into the same state as the first engagement mode.

[0109] As the drum drive transmission unit 180a further rotates along the rotation direction A, the relative state and engagement mode of the drum coupling 143 and the drum drive transmission unit 180a are consistent with the description of the first engagement mode, and are not repeated here. As a result, the relative state of the drum drive transmission unit 180a and the drum coupling 143 is changed from the second engagement mode to the engagement state of the first engagement mode, and the drum coupling 143 can rotate along with the drum drive transmission unit 180a in the rotation direction A, so that the driving force can be transmitted between the drum coupling and the drum drive coupling 180, and the photosensitive drum 104 is driven to rotate.

[0110] The third mode of engagement, such as Fig.19 As shown, after the front door 11 is closed, the drum drive transmission unit 180a extends axially in the M2 direction, and the contact end 143d contacts the drum drive coupling 180. Specifically, the contact end 143d contacts the third drive transmission surface 1804. At this time, since the drive transmission part 180d and the drum drive coupling 180 are integrally formed, the drum coupling 143 is pressurized on one side, and the engaging elastic part 143c is in a compressed state, so that the action part 143a moves in the M2 direction.

[0111] In the state shown in the third engagement mode, as the drum drive transfer unit 180a receives the driving force from the imaging device 10 and rotates in the rotation direction A, the drum coupling 143 moves relative to the position of the drum drive coupling in a direction away from the first drive transmission surface 1802, that is, as the drum drive transfer unit 180a rotates, the contact end 143d will disengage from the drum drive coupling 180 and enter the gap between the first inclined surface 204f and the drum drive coupling 180, that is, at this time, the relative state of the drum drive transfer unit 180a and the drum coupling 143 is changed to the state shown in the second engagement mode.

[0112] As the drum drive transmission unit 180a further rotates along the rotation direction A, the relative state and engagement mode of the drum coupling 143 and the drum drive transmission unit 180a are consistent with the description of the first engagement mode, and are not repeated here. As a result, the relative state of the drum drive transmission unit 180a and the drum coupling 143 is changed from the second engagement mode to the engagement state of the first engagement mode, and the drum coupling 143 can rotate along with the drum drive transmission unit 180a in the rotation direction A, so that the driving force can be transmitted between the drum coupling 143 and the drum drive coupling 180, and the photosensitive drum 104 is driven to rotate.

[0113] Through the structure of the embodiment of the utility model, when the process cartridge 100 is mounted on the main body of the imaging device 10, even if the position of the drum drive transmission unit 180a relative to the drum coupling 143 is not in a predetermined state, that is, the two can finally achieve a coupling state in any case. The drum coupling 143 structure is not only simple in shape, but also has a stable connection structure with the drum drive transmission unit 180a in the coupling state, which can ensure stable transmission of the driving force.

[0114] Embodiment 2

[0115] like Figures 20 to 38As shown, another drum coupling is provided in this embodiment case, and the difference between this embodiment case and embodiment case one is that: in this embodiment case, the structure of the drum coupling 143 is different from the drum coupling 143 of embodiment one, and the drum coupling 143 can be engaged with the drum drive coupling 180 and the first movable component 204 and / or the second movable component 208, so as to realize the function of the drum drive transmission unit 180a to transmit the driving force to the drum coupling 143.

[0116] like Figure 20 to Figure 23 As shown, the drum coupling 143 includes an action portion 143a, the action portion 143a includes a shaft portion 143j, the shaft portion 143j is rotatably supported by the drive side cartridge cover component 116 supporting the photosensitive drum 104 and the drum coupling 143, and the drum coupling 143 is also provided with a protrusion protruding axially outward from the end of the shaft portion 143j, and the protrusion is a part of the action portion 143a. The protrusion also includes a braking force receiving portion 143x for receiving a braking force (load) from the drum drive transmission unit 180a.

[0117] The protrusion of the drum coupling 143 also has a spiral slope 143g, a shield portion 143k and a circular hole portion 143q.

[0118] Specifically, the spiral bevel 143g is the portion of the protrusion facing the M1 direction in the axial direction, and the spiral bevel 143g is inclined to be outward in the axial direction M1 toward the upstream side in the rotation direction (the upstream side in the direction of arrow A), that is, the spiral bevel 143g extends from the upstream in the rotation direction to the downstream toward the non-driven side end of the drum unit 109 and the processing box 100, and the spiral bevel 143g is capable of guiding the moving parts (204, 208) so that the moving parts (204, 208) move relative to the drum drive coupling 180 in the rotation direction of the drum driving force transmission unit 180a; and the spiral bevel 143g has an inclined starting part 143f upstream in the rotation direction of arrow A.

[0119] The shield portion 143k is used to contact the second braking force engagement member 208 to block the protruding portion of the drum drive force transmission unit 180a from entering in the axial direction, that is, the shield portion 143k can prevent the drum drive transmission unit 180a from entering the drum coupling 143 in the axial direction during the engagement of the drum drive transmission unit 180a with the drum coupling 143, so that the moving parts (204, 208) cannot be properly engaged. And the portion opposite to the shield portion 143k and the spiral slope 143g in the axial direction and facing the M2 direction is the abutment surface 143h for abutting against the drive transmission limiting surface 143d2 (described in detail below), and the inclination and extension direction of the abutment surface 143h are consistent with the shield portion 143k and the spiral slope 143g.

[0120] The circular hole portion 143q is used to engage with the reinforced cylindrical portion 180e of the drum drive coupling 180 and position the axes of each other. The protrusion of the drum coupling 143 includes a shaft portion 143p formed along the axial direction, and the circular hole portion 143q is formed inside the shaft portion 143p. The diameter of the shaft portion 143p is smaller than the diameter of the above-mentioned shaft portion 143j. The diameter of the shaft portion 143p is larger than the diameter of the reinforced cylindrical portion 180e. When the drum drive coupling 180 is drivingly connected to the drum coupling 180, the reinforced cylindrical portion 180e can be inserted into the shaft portion 143p, so that when the drum drive coupling 180 is drivingly connected to the drum coupling, the driving connection between the drum drive coupling 180 and the drum coupling is more stable.

[0121] like Fig. 20 , Fig.25 As shown, the drum coupling 143 is of an axisymmetric shape, and the braking force receiving portion 143x and the spiral bevel 143g are arranged at two positions and separated by 180° in the circumferential direction, that is, the protrusion is of an axisymmetric shape. In addition to the arrangement position of the protrusion, an opening 143o in the axial direction is also provided within the circumferential range of the inner diameter of the shaft portion 143j. The opening 143o is also axisymmetrically distributed. In the rotation direction of the arrow A, the spiral bevel 143g and the braking force receiving portion 143x are located upstream of the opening 143o. Similarly, the opening 143o also belongs to the action portion 143a.

[0122] The action portion 143a also includes a movable action block 143d, which is arranged in the opening 143o. When the movable action block 143d is arranged in the opening 143o, the two ends of the movable action block 143d in the radial direction respectively abut against the outer diameter of the shaft portion 143p and the inner diameter of the shaft portion 143j, and the movable action block is allowed to move circumferentially along the inner wall of the shaft portion 143j within the range of the opening in the opening 143o.

[0123] like Figure 20 to Figure 22 As shown, the movable action block 143d can be used as a drive transmission part, and the movable action block 143d includes a drive receiving surface 143d1 and a drive transmission limiting surface 143d2. In this embodiment, the drive receiving surface 143d1 is inclined to face outward along the rotation direction of arrow A, that is, the drive receiving surface 143d1 extends from the upstream to the downstream in the rotation direction toward the non-driving side away from the process cartridge 100 and the drum unit 109, and the drive transmission limiting surface 143d2 is a vertical plane along the axial direction located at the downstream end of the drive receiving surface 143d1, and the drive receiving surface 143d1 can abut against the abutment surface 143h, blocking the movable action block 143d from moving circumferentially within the range of the opening 143o.

[0124] The movable action block 143d also includes a main body portion 143d3, which extends in the axial direction. Specifically, the main body portion 143d3 has arc surfaces at both ends in the radial direction, and the arc surfaces at both ends in the radial direction of the main body portion 143d3 are in contact with the outer diameter of the shaft portion 143p and the inner diameter of the shaft portion 143j respectively, and the drive receiving surface 143d1 is formed as an end surface of the main body portion 143d3 in the axial direction away from the non-driving side of the processing box 100 and located on the upstream side of the rotation direction A, and the drive transmission limiting surface 143d2 is formed as an end surface 143d2a of the main body portion in the axial direction away from the non-driving side of the processing box 100 and located on the downstream side of the rotation direction A and an end surface 143d2b of the main body portion 143d3 located on the downstream side adjacent thereto.

[0125] In this embodiment, in order to ensure the stability of the engagement state between the drum coupling 143 and the drum drive transmission unit 180a described later, the main body 143d3 is also provided with a protruding block protruding radially outward. Therefore, the radial extension distance of the end face 143d2b on the downstream side of the main body 143d3 is greater than that of the end face of the main body 143d3 on the upstream side, that is, the thickness of the main body 143d3 on the downstream side is greater than the thickness on the upstream side.

[0126] like Fig.23 , Fig.24 As shown, a flange 143d4 extending radially is provided at one end of the main body portion 143d3 close to the shaft portion 143j, and the flange 143d4 is farther from the axis in the radial direction along the main body portion 143d3, and when the movable action block 143d is arranged in the opening 143o, the flange 143d4 overlaps with the wall thickness portion of the shaft portion 143j in the axial direction, which is used to limit the movement of the movable action block 143d in the direction away from the photosensitive drum 104 and prevent the movable action block 143d from separating from the protruding portion and falling off.

[0127] The movable action block 143d also includes an end portion 143d5 located in the axial direction near the non-driving side end, the arc length of the end portion 143d5 along the circumferential direction is greater than the main body portion 143d3, and the end surface of the end portion 143d5 along the axial direction near the driving side contacts the end surface portion 104b of the photosensitive drum 104, which is used to limit the movement of the movable action block 143d toward the non-driving side in the axial direction. Optionally, the flange 143d4 and the action portion and the end portion 143d5 and the end portion 104b of the photosensitive drum are allowed to have a gap distance, that is, the movable action block 143d is allowed to move in the axial direction within the gap distance range; and the end portion 143d5 also has a receiving recess 143d6, the receiving recess 143d5 radially penetrates the main body portion 143d3, and the receiving recess 143d6 is used to accommodate the elastic engagement portion 143c (described in detail later).

[0128] refer to Fig. 20In the rotation direction of the drum coupling 180, the braking force receiving portion 143x is located on the downstream side of the movable action block 143d and on the upstream side of the spiral slope 143g, and the braking force receiving portion 143x can engage the moving component (204, 208) so that the drum unit receives the braking force of the drum drive transmission unit 180a. Specifically, in the present embodiment, the braking force receiving portion 143x extends from the upstream to the downstream in the rotation direction of the drum coupling toward the non-driving side of the process cartridge, and at least partially overlaps with the spiral slope 143g in the axial direction of the photosensitive drum 104. The moving part (204, 208) moves under the guidance of the spiral bevel 143g and provides a force in the downstream of the rotation direction to the movable action block 143d, so that the movable action block 143d overcomes the elastic force of the elastic engagement part and moves downstream. When the moving part (204, 208) moves to the position of the spiral bevel 143g downstream of the drum coupling 180d in the rotation direction, the movable action block 143d moves upstream in the rotation direction and provides an elastic force in the upstream of the rotation direction to the moving part (204, 208), so that the moving part (204, 208) rebounds and engages with the braking force receiving part 143x. The moving part (204, 208) is limited by the braking force receiving part 143x and the elastic engagement part in the upstream and downstream of the rotation direction, so that the moving part (204, 208) drives the drum unit to rotate more stably.

[0129] Further, the movable action block 143d, the braking force receiving part 143x, the spiral bevel 143g, and the opening 143o are each provided with two, and are axially symmetrically arranged on the action part 143a. Specifically, in the present embodiment, the movable action block 143d, the braking force receiving part 143x, the spiral bevel 143g, and the opening 143o are axially symmetrically arranged at two positions, thereby providing a first coupling part and a second coupling part. Optionally, the number of coupling parts can also be one, or adjusted accordingly according to the structure of the drum drive transmission unit 180a, or only retaining the above-mentioned partial functions in different coupling part setting areas and finally realizing the driving force transmission function through the cooperation between different coupling parts, and no specific restrictions are made on this.

[0130] like Fig. 22 , Fig.26As shown, the drum coupling 143 also includes a supporting portion 143b, which is arranged at a position of the drum coupling 143 closer to the non-driving side of the processing box 100 than the action portion 143a, and the supporting portion 143b is connected to the photosensitive drum, and the supporting portion 143b includes a supporting column 143b1 and abutting portion 143b2, and the supporting column 143b1 and the abutting portion 143b2 are connected to the action portion 143a. Specifically, in the present embodiment, the supporting column 143b1 is formed into a cylindrical shape, and the abutting portion 143b2 is formed into a rectangular block. Optionally, in some other embodiments, the supporting column 143b1 and the abutting portion 143b2 can be formed into other geometric shapes, such as a prism, a pyramid, etc., or the abutting portion 143b2 can also be set in the form of an insertion hole, which is not specifically limited.

[0131] like Figure 21 to Figure 23 , Fig.26 As shown, the drum coupling 143 also includes an elastic engagement portion 143c, which is used to engage the action portion 143a with the support portion 143b. Specifically, in the present embodiment, the elastic engagement portion 143c is set as a torsion spring structure, and the elastic engagement portion 143c includes a mounting portion 143c1, a first abutting portion 143c2, and a second abutting portion 143c3. The mounting portion 143c1 is sleeved on the support column 143b1, and the first abutting portion 143c2 abuts against the abutting portion 143b2, and the second abutting portion 143c3 abuts against the accommodating recess 143d6 of the movable action block 143d located at the end 143d5. Therefore, the elastic force of the elastic engagement portion 143c makes the movable action block 143d approach the upstream protruding portion in the rotation direction A. Preferably, the movable action block 143d approaches the upstream brake engagement portion 143x under the elastic force of the elastic engagement portion 143c. Optionally, in some other embodiments, the arrangement form and the number of the elastic engagement portion 143c may be adjusted and changed accordingly according to the movable action block 143d and the supporting portion 143b.

[0132] In addition, it should be pointed out that if Figure 3 , Fig. 27 , Fig.29 As shown, in this embodiment, when the drum drive transmission unit 180a and the drum coupling 143 perform drive transmission, the drive limiting surface 1806 of the drum drive coupling 180 located on the upstream side of the drive force transmission part in the first embodiment is also needed. The drive limiting surface 1806 is used to abut against the drive transmission limiting surface 143d2 in the rotation direction A to ensure that the drive receiving surface 143d1 can stably receive the driving force from the drum drive transmission unit 180a of the imaging device.

[0133] like Figure 3In the embodiment, the coupling engaging portion 208b of the second movable member 208 has a portion of a protrusion 208e protruding radially inward and an inclined surface 208f located downstream of the protrusion 208e in the rotation direction A, and the first movable member 204 has a first inclined surface 204f. Optionally, both the first inclined surface 204f and the inclined surface 208f can be used as a drive transmission portion, or both can be used as a drive force applying portion at the same time, and the specific working process of the drive force applying portion will be described in detail in the following content.

[0134] Figure 27 to Figure 29 The process of the drum coupling 143 and the drum drive transfer unit 180a engaging with each other in this embodiment will be described. The drum coupling 143 and the drum drive transfer unit 180a have two engagement modes. For better explanation, a part of the structure of the drum drive coupling 180 is omitted and the internal shape is not covered.

[0135] The first mode of engagement, such as Fig.28 As shown, in Fig. 27 In the unengaged phase state relationship shown in the figure, after the processing box 100 is installed inside the main body of the imaging device and the front door 11 of the imaging device 10 is closed, the drum drive coupling 180 of the drum drive transmission unit 180a and the first movable component 204 and the second movable component 208 are in a position state after approaching each other, and at this time, the inclined starting part 143f of the drum coupling 143 is located on the upstream side of the protrusion 208e in the rotation direction A. As the drum drive transmission unit 180a receives the driving force from the imaging device and rotates in the direction A, the drum drive transmission unit 180a will move in the direction of arrow M2, that is, Fig.28 The second movable part 208 shown moves in the direction of arrow M2, at which time, the spiral ramp 143g is relative to and contacts the inward protrusion 208e of the approaching second movable part 208, and the drum drive transfer unit 180a and the drum coupling 143 approach each other relatively until they contact each other, but the state inside the drum drive transfer unit 180a does not change.

[0136] like Fig.29 As shown, the drum drive transmission unit 180a further rotates, and the second moving member 208 moves from Fig.28 In the state shown in the arrow M2 direction, the spiral bevel 143g stops the second moving member 208 approaching in the axial direction, thereby, in the drum drive transmission unit 180a, the second moving member 208 is pushed in the arrow M1 direction relative to the drum drive coupling 180. In this state, as shown in FIG. Figure 3Related content, the second movable member 208 is disconnected from the brake component 206, so the second movable member 208 is in a state of rotating without receiving the load from the brake component 206. Due to the elastic force of the drum drive coupling spring 210 and the engagement spring 211 in the axial direction, the spiral bevel 143g moves the second movable member 208 that does not receive the load in the arrow C direction by the component of the elastic force. That is, the second movable member 208 is rotationally moved to the downstream side of the rotation direction A along the spiral bevel 143g. At this time, as the drum drive transmission unit 180a approaches the drum coupling 143 along the spiral bevel 143g, the inclined surface 208f of the second movable member 208 begins to contact the active action block 143d. Specifically, the inclined surface 208f contacts the driving force receiving surface 143d1, that is, the active action block 143d receives the pushing force along the rotation direction A. Therefore, the elastic engagement portion 143c also receives the effect of the force A along the rotation direction by the active action block 143d.

[0137] like Fig.30 As shown, the drum drive transmission unit 180a further rotates, the second movable member 208 further moves in the arrow M2 direction, and in the state after the second movable member 208 moves to the downstream in the rotation direction A, the second movable member 208 moves along the spiral slope 143g of the drum coupling 143, and further moves in the M2 direction by the amount of movement of the entire drum drive transmission unit 180a in the axial direction M2 direction, and the movement trajectory is shown by the arrow D. Therefore, the movable members (204, 208) move away from the drive coupling 180 toward the downstream side in the rotation direction A to a position where they can engage with the braking force receiving portion 143x of the drum coupling 143. When reaching this position, the movable members (204, 208) return to a state where a braking force can be generated (i.e., they are transmission-connected with the brake member 206 and receive the load action from the brake member 206). During this process, the movable action block 143d receives the combined action force of the second movable component 208 and the elastic engagement portion 143c along the rotation direction A. As the second movable component 208 moves along D, the movable action block 143d moves circumferentially along the opening 143o.

[0138] refer to Fig.31 , Fig.32At this time, the moving parts 204 and 208 are located near the through hole part 180f at one end of the rotation direction A, that is, the moving parts 204 and 208 interfere with the drum drive coupling 180, and the moving parts 204 and 208 cannot continue to rotate circumferentially relative to the drum drive coupling 180. At this time, the movable action block 143d connected to the braking force receiving part 143x moves the farthest distance in the circumferential direction, and in the engaged state of the drum drive transmission unit 180a and the drum coupling 143, the braking force receiving part 143x, the second moving part 208, and the movable action block 143d are sequentially distributed in the circumferential direction of the rotation direction A.

[0139] Moreover, reference Fig.33 , Fig.34 , the drive transmission limiting surface 143d2a contacts the abutting surface 143h, and the drive transmission limiting surface 143d2 contacts the drive limiting surface 1806. Optionally, in some other embodiments, to ensure stable drive transmission, a slope with a higher matching degree of the inclined surface 208f may be provided at the drive receiving surface 143d1 that contacts the inclined surface 208f.

[0140] Therefore, in Fig.34 In the illustrated state, the drum coupling 143 receives the driving force in the rotation direction A through the second movable member 208 , and the braking force receiving portion 143 x receives the braking force of the second movable member 208 .

[0141] Optionally, in some other embodiments, the drum coupling 143 can be engaged with the first movable member 204 by changing the structure of the action portion 143a, such as the radial position of the protruding portion, the radial size of the movable action block 143d, etc.; or the drum coupling 143 can be partially engaged with the first movable member 204 and partially engaged with the second movable member 208 to complete power transmission. In different power transmission engagement conditions, the engagement condition of the drive transmission limiting surface and the drum drive coupling 180 can also be adjusted accordingly, which is not specifically limited here.

[0142] The second bonding mode, such as Figures 35 to 38 As shown, reference Fig.35 In this embodiment, the phases of the inclined start portion 143f of the drum coupling 143 and the inward protrusion 208e of the second moving member satisfy the following relationship. That is, the inclined start portion 143f of the drum coupling 143 is on the downstream side of the inward protrusion 208e in the rotation direction A. Fig.36 Shown in Fig.35 In the state, the relative phase relationship between the second movable component 208 and the drum coupling 143, at this time, the drum drive coupling 180 and the second movable component 208 are in a state close to each other.

[0143] like Fig.37 After the process box 100 is installed in the main body of the imaging device 10 and the front door 11 is closed, the drum drive transmission unit 180a approaches the drum coupling 143 along the M2 direction, and the shutter portion 143k approaches and contacts the second movable member 208. Because the second movable member 208 has a protrusion 208e in the radial direction, it will interfere with the shutter portion 143k and contact it. In this state, the shutter portion 143k prevents the second movable member 208 from continuing to move along the M2 direction. At this time, because the shutter portion 143k and the drum drive coupling 180 are in different radial positions, the shapes of the two will not interfere. Through the movement of the drum drive coupling 180 in the M2 direction, the second movable member 208 moves relative to the drum drive coupling 180 in the M1 direction. As described above, through this relative movement, the second movable member 208 is transformed into a state where it can rotate without receiving a rotational load.

[0144] Fig.38 As shown, during the rotation of the drum drive transmission unit 180a in the rotation direction A, first, when the drum drive coupling 180 starts to rotate in the A direction, it is pushed by the drum drive coupling 180, and the second movable member 208 also starts to rotate in the A direction, that is, the phase relationship between the second movable member 208 and the drum coupling 143 changes, and the protrusion 208e moves to a contact position with the inclined start portion 143f relative to the drum coupling 143. After the protrusion 208e passes the point where the inclined start portion 143f is reached, the second movable member 208 moves along the spiral inclined surface 143g of the drum coupling 143 in the direction of arrow C, that is, the second movable member 208 moves toward the downstream side of the rotation direction A and the M2 direction.

[0145] In this embodiment, the shutter portion 143k is continuous with the spiral slope 143g, and the inclination start portion 143f is the boundary portion between the shutter portion 143g and the spiral slope 143g. Therefore, as the drum drive transmission unit 180a further rotates in the direction of arrow A, the engagement process is the same as the first engagement mode engagement process.

[0146] exist Figures 28 to 30 , Figures 33 to 38 In FIG. 1 , only the engagement process of the second movable member 208 and the drum coupling 143 is shown. However, in the above engagement process, the first movable member 204 always moves integrally with the second movable member 208.

[0147] In the above-mentioned engagement process, the drum drive coupling 180 and the second movable member 208 are in a phase state close to each other. However, in the actual operation process of the imaging device and the processing box 100, there is a state in which the drum drive coupling 180 and the second movable member 208 are separated from each other. After the processing box 100 is installed in the imaging device and the front door is closed, the drum drive transmission unit 180a begins to receive the driving force and rotates in the direction A. If the protrusion 208e of the second movable member is in a phase state of contacting the shutter part 143k at this time, the second movable member 208 cannot receive power by itself and rotate. Therefore, first, the drum drive coupling 180 will receive the driving force and rotate in the rotation direction A to get close to the second movable member 208, and the two are converted into a phase relationship close to each other. Next, the engagement process as described above will occur, and the first movable member and the second movable member will move as a whole during the engagement process.

[0148] As described above, in this embodiment, the drum coupling 143 of the processing box 100 receives the driving force and the braking force from the drum drive transmission unit 180a of the main body of the imaging device. Specifically, the drum coupling 143 receives the driving force and the braking force from the movable parts 204 and 208, and ensures the stable transmission of the driving force under the limiting effect of the drum drive coupling 180. In addition, the action of the movable action block 143d and the elastic engagement portion 143c also helps to ensure that the driving force and the braking force are stably realized; and the specifications and dimensions of the movable action block 143d and the elastic engagement portion 143c are easy to adjust, so as to adapt to the drum drive transmission unit structure of different imaging devices.

[0149] In this embodiment, the processing box 100 and the drum drive transmission unit 180a are consistent with those in the first embodiment and will not be described here.

[0150] The drum coupling structure of the utility model is simple in shape, and the engagement process with the drum drive transmission unit is completed through its own axial feeding and the rotation action of the main component, so that the alignment and engagement process are relatively simple; and after the engagement action is completed, the structure of the drum coupling can ensure that the driving force transmission process between the drive transmission unit and the drum coupling is stable to avoid abnormal situations such as disengagement. In addition, when the processing box needs to be separated and disassembled from the main component, the operation is simple.

[0151] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A drum unit, used to form a processing box after cooperating with a developing unit and installed in an imaging device, wherein the imaging device is provided with a drum drive transmission unit, and the drum drive transmission unit is provided with a moving part, characterized in that: The drum unit comprises: Drum frame; a photosensitive drum rotatably supported by the drum frame; A drum coupling, for receiving a driving force from the imaging device and transmitting it to the photosensitive drum, and the drum coupling comprises: a supporting portion connected to the photosensitive drum; and An action portion is arranged on a side of the support portion away from the photosensitive drum, and the action portion is provided with a movable action block which can move circumferentially; When the processing box is installed in the imaging device, the moving component abuts against the movable action block, so that the moving component generates a driving force with the drum coupling to drive the photosensitive drum to rotate.

2. A drum unit according to claim 1, characterized in that: The movable acting block is provided with a driving receiving surface for engaging with the moving member so that the movable acting block receives the driving force of the moving member.

3. A drum unit according to claim 2, characterized in that: The drive receiving surface is located on the movable acting block on the upstream side in the rotation direction of the drum coupling.

4. A drum unit according to claim 3, characterized in that: The drive receiving surface is an inclined surface, and the drive receiving surface extends from upstream to downstream in the rotation direction of the drum coupling on the movable action block toward a side away from the photosensitive drum.

5. A drum unit according to claim 2, characterized in that: The drum coupling further includes an abutment surface, and the movable action block is provided with a drive transmission limiting surface for abutting against the abutment surface.

6. A drum unit according to claim 5, characterized in that: The drive transmission restricting surface is located on the downstream side in the rotation direction of the drum coupling.

7. A drum unit according to claim 1, characterized in that: The action portion further includes a spiral bevel, which is located on the upstream side of the movable action block in the rotation direction of the drum coupling, and is used to guide the moving component so that the moving component moves to a position abutting against the movable action block.

8. A drum unit according to claim 7, characterized in that: The spiral slope extends from upstream to downstream in the rotation direction of the drum coupling toward a side close to the photosensitive drum.

9. A drum unit according to claim 7, characterized in that: The action portion further includes a shield portion for blocking the axial movement of the moving component.

10. A drum unit according to claim 9, characterized in that: The shield portion and the spiral slope are continuously arranged in the rotation direction of the drum coupling.

11. A drum unit according to claim 9, characterized in that: The shield portion and the spiral slope portion that are opposite to each other in the axial direction and face away from the drum drive transmission unit serve as abutment surfaces that block the movable action block.

12. A drum unit according to any one of claims 1 to 11, characterized in that: The acting portion further includes a braking force receiving portion for engaging the moving member so that the drum unit receives the braking force of the drum drive transmission unit.

13. A drum unit according to claim 12, characterized in that: The braking force receiving portion extends from upstream to downstream in a rotation direction of the drum coupling toward a side away from the photosensitive drum.

14. A drum unit according to claim 12, characterized in that: The drum coupling also includes an elastic engaging portion, which is arranged between the supporting portion and the movable action block and is configured to have an elastic force effect on the movable action block to reset after movement, so that the moving component can engage with the braking force receiving portion under the action of the elastic force.

15. A drum unit according to claim 14, characterized in that: The action portion is provided with an opening, the movable action block is installed in the opening and can move circumferentially, and one end of the movable action block is connected to the support portion through the elastic joint portion in the action portion, and the movable action block can overcome the elastic force of the elastic joint portion and move circumferentially relative to the support portion within the range of the opening.

16. A drum unit according to claim 15, characterized in that: The movable action block is provided with a accommodating recess at one end in the action part, the supporting part includes a supporting column and an abutting part, the elastic engaging part is a torsion spring, which is sleeved on the supporting column, and one end abuts against the abutting part, and the other end abuts in the accommodating recess, so that there is an elastic force in the circumferential direction between the supporting part and the movable action block.

17. A drum unit according to any one of claims 1 to 11, characterized in that: The drum coupling further includes a circular hole portion for engaging with a reinforcing cylindrical portion provided to the drum drive transmission unit and positioning axes of each other.

18. A drum unit according to any one of claims 1 to 11, characterized in that: The movable component includes a first movable component and a second movable component, the first movable component is provided with a stop recess, the second movable component is provided with a stop protrusion, the stop recess is engaged with the stop protrusion so that the first movable component and the second movable component can rotate integrally, wherein the first movable component or the second movable component abuts against the movable action block.

19. A process cartridge installed in an image forming device, characterized in that: The drum unit comprises the drum unit as claimed in any one of claims 1 to 18.

Images