WO2018037573A1 - ドラムユニット、カートリッジ、電子写真画像形成装置、およびカップリング部材 - Google Patents
ドラムユニット、カートリッジ、電子写真画像形成装置、およびカップリング部材 Download PDFInfo
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- WO2018037573A1 WO2018037573A1 PCT/JP2016/075735 JP2016075735W WO2018037573A1 WO 2018037573 A1 WO2018037573 A1 WO 2018037573A1 JP 2016075735 W JP2016075735 W JP 2016075735W WO 2018037573 A1 WO2018037573 A1 WO 2018037573A1
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- WIPO (PCT)
- Prior art keywords
- driving force
- drum unit
- cartridge
- receiving portion
- force receiving
- Prior art date
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Images
Classifications
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- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
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- G—PHYSICS
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- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/75—Details relating to xerographic drum, band or plate, e.g. replacing, testing
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- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
- G03G15/0208—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus
- G03G15/0216—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus by bringing a charging member into contact with the member to be charged, e.g. roller, brush chargers
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- G—PHYSICS
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- G—PHYSICS
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- G—PHYSICS
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- G03G21/1839—Means for handling the process cartridge in the apparatus body
- G03G21/1857—Means for handling the process cartridge in the apparatus body for transmitting mechanical drive power to the process cartridge, drive mechanisms, gears, couplings, braking mechanisms
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Definitions
- the present invention relates to an electrophotographic image forming apparatus using an electrophotographic system, and a drum unit, a cartridge, a coupling member, and the like used in the apparatus.
- an electrophotographic image forming apparatus a configuration in which elements such as a photosensitive drum and a developing roller as a rotating body related to image formation are integrated as a cartridge and is detachable from an image forming apparatus main body (hereinafter, apparatus main body) is known.
- apparatus main body an image forming apparatus main body
- a configuration in which a driving force is received from the apparatus main body to rotate the photosensitive drum in the cartridge is employed in many apparatuses.
- a configuration is known in which a coupling member is engaged with a driving force transmission unit such as a driving pin on the apparatus main body side to transmit a driving force to the cartridge side.
- Patent Document 1 discloses a cartridge that includes a coupling member provided at an end of a photosensitive drum that can be tilted with respect to the rotational axis of the photosensitive drum.
- a typical configuration is a drum unit configured to be detachable from a main body of an electrophotographic image forming apparatus provided with a drive shaft having a recess, and is (1) a photosensitive drum, and (2) provided on the photosensitive drum.
- a biasing member configured to bias the member.
- FIG. 1 is a schematic sectional view of the image forming apparatus 100.
- FIG. 2 is an external perspective view of the process cartridge 7.
- FIG. 3 is a schematic sectional view of the process cartridge 7.
- FIG. 4 is a cross-sectional view of the process cartridge 7.
- FIG. 5 is a sectional view of the process cartridge 7.
- FIG. 6 is an external view of the main body drive shaft 101.
- FIG. 7 is a sectional view of the main body drive shaft 101.
- FIG. 8 is a perspective view of the main body drive shaft 101.
- FIG. 9 is a cross-sectional view of the coupling 28 and the main body drive shaft 101.
- FIG. 10 is a sectional view of the coupling unit 28 and the main body drive shaft 101 in the vertical direction of the rotation axis.
- FIG. 11 is a drive side perspective view of the drum unit 30.
- FIG. 12 is a drive side sectional view of the drum unit 30.
- FIG. 13 is a perspective view of the engaging member 65.
- FIG. 14 is a perspective view of members constituting the coupling unit 28.
- FIG. 15 is a sectional view of the coupling unit 28 in the vertical direction of the rotation axis.
- FIG. 16 is a perspective view showing the mounting of the cartridge 7 to the image forming apparatus main body 100A.
- FIG. 17 is a cross-sectional view showing the mounting of the cartridge 7 to the image forming apparatus main body 100A.
- FIG. 18 is a cross-sectional view showing the mounting of the cartridge 7 to the image forming apparatus main body 100A.
- FIG. 19 is a cross-sectional view showing the mounting of the cartridge 7 to the image forming apparatus main body 100A.
- FIG. 20 is a cross-sectional view showing mounting of the coupling unit 28 to the main body drive shaft 101.
- FIG. 21 is a cross-sectional view showing mounting of the coupling unit 28 to the main body drive shaft 101.
- FIG. 22 is a cross-sectional view showing mounting of the coupling unit 28 to the main body drive shaft 101.
- FIG. 24 is a sectional view of the coupling unit 28 and the main body drive shaft 101 in the vertical direction of the rotation axis.
- FIG. 25 is a sectional view of the coupling unit 28 and the main body drive shaft 101 in the vertical direction of the rotation axis.
- FIG. 26 is a cross-sectional view of the engagement member 65 and the drive transmission engagement surface of the main body drive shaft 101.
- FIG. 27 is a schematic sectional view of the image forming apparatus 4100A.
- FIG. 28 is an external perspective view of the drum cartridge 4013.
- FIG. 29 is a sectional view of the drum cartridge 4013.
- FIG. 30 is an external perspective view of the developing cartridge 4004.
- FIG. 31 is a sectional view of the developing cartridge 4004.
- FIG. 32 is a perspective view of the main body drive shaft 4101.
- FIG. 33 is a cross-sectional view of the main body drive shaft 4101.
- FIG. 34 is a perspective view of the coupling unit 4028.
- FIG. 35 is a perspective view of the engaging member 4065.
- FIG. 36 is a perspective view of members constituting the coupling unit 4028.
- FIG. 37 is a perspective view of the coupling unit 4028 and the toner supply roller 4020.
- FIG. 39 is a sectional view of the developing cartridge 4004.
- FIG. 40 is a perspective view showing the mounting of the developing cartridge 4004 to the image forming apparatus main body 4100.
- FIG. 40 is a perspective view showing the mounting of the developing cartridge 4004 to the image forming apparatus main body 4100.
- FIG. 41 is a cross-sectional view showing mounting of the developing cartridge 4004 to the image forming apparatus main body 4100.
- FIG. 41 is a cross-sectional view showing mounting of the developing cartridge 4004 to the image forming apparatus main body 4100.
- FIG. 42 is a cross-sectional view showing the mounting of the developing cartridge 4004 to the image forming apparatus main body 4100.
- FIG. 42 is a cross-sectional view showing the mounting of the developing cartridge 4004 to the image forming apparatus main body 4100.
- FIG. 43 is a cross-sectional view showing the mounting of the developing cartridge 4004 to the image forming apparatus main body 4100.
- FIG. 44 is a cross-sectional view showing mounting of the coupling unit 4028 to the main body drive shaft 4101.
- FIG. 45 is a cross-sectional view showing mounting of the coupling unit 4028 to the main body drive shaft 4101.
- FIG. 46 is a cross-sectional view showing mounting of the coupling unit 4028 to the main body drive shaft 4101.
- FIG. 47 is a cross-sectional view showing attachment of the coupling unit 4028 to the main body drive shaft 4101.
- FIG. 48 is an explanatory view showing an engaging member.
- FIG. 50 is an explanatory view showing an engaging member.
- Fig. 51 is a cross-sectional view of the coupling unit.
- Fig. 52 is a cross-sectional view of the coupling unit.
- Fig. 53 is a sectional view of the coupling unit.
- Fig. 54 is a cross-sectional view of the coupling unit.
- Fig. 55 is a sectional view of the coupling unit.
- Fig. 56 is a sectional view of the coupling unit.
- Fig. 57 is a cross-sectional view of the coupling unit.
- the image forming apparatus forms an image on a recording medium using, for example, an electrophotographic image forming process.
- an electrophotographic copying machine for example, an electrophotographic printer (for example, an LED printer, a laser beam printer, etc.), an electrophotographic facsimile machine, and the like are included.
- the cartridge refers to a cartridge that can be attached to and detached from the image forming apparatus main body (apparatus main body).
- a cartridge in which a photosensitive member and process means acting on the photosensitive member are integrated is called a process cartridge.
- a unit in which the photosensitive drum and the coupling member are integrated is called a drum unit.
- the upper direction means the upper direction in the gravity direction when the image forming apparatus is installed.
- FIG. 1 is a schematic cross-sectional view of an image forming apparatus 100 of the present embodiment.
- the image forming apparatus 100 includes a first image forming unit configured to form an image of each color of yellow (Y), magenta (M), cyan (C), and black (K) as a plurality of image forming units. It has second, third, and fourth image forming units SY, SM, SC, and SK. In the present embodiment, the first to fourth image forming units SY, SM, SC, and SK are arranged in a line in a substantially horizontal direction.
- the configuration and operation of the process cartridge 7 (7Y, 7M, 7C, 7K) are substantially the same except that the color of the image to be formed is different. Therefore, in the following, when there is no particular need for distinction, Y, M, C, and K will be omitted, and a general description will be given.
- the image forming apparatus 100 includes a cylinder (hereinafter referred to as a photosensitive drum) 1 having four photosensitive layers arranged in parallel in a direction slightly inclined with respect to the vertical direction as a plurality of image carriers. .
- a scanner unit (exposure device) 3 is arranged below the process cartridge 7 in the direction of gravity. Further, around the photosensitive drum 1, a charging roller 2 as a process means (process device, process member) acting on the photosensitive layer is disposed.
- the charging roller 2 is a charging means (charging device, charging member) that uniformly charges the surface of the photosensitive drum 1.
- the scanner unit (exposure device) 3 is exposure means (exposure device, exposure member) that forms an electrostatic image (electrostatic latent image) on the photosensitive drum 1 by irradiating a laser based on image information.
- a developing device (hereinafter referred to as a developing unit) 4 and a cleaning blade 6 as a cleaning means (cleaning device, cleaning member) are arranged.
- an intermediate transfer belt 5 as an intermediate transfer body for transferring a toner image on the photosensitive drum 1 to a recording material (sheet, recording medium) 12 is disposed opposite to the four photosensitive drums 1. Yes.
- the developing unit 4 of this embodiment uses a non-magnetic one-component developer (hereinafter referred to as toner) as a developer, and a contact developing method in which a developing roller 17 as a developer carrying member is brought into contact with the photosensitive drum 1. Adopted.
- toner non-magnetic one-component developer
- the toner image formed on the photosensitive drum 1 is transferred onto the sheet (paper) 12, and the toner image transferred onto the sheet is fixed.
- the process cartridge includes a charging roller 2 that charges the photosensitive drum 1 and a cleaning blade 6 that cleans toner remaining without being transferred onto the photosensitive drum 1.
- Untransferred toner remaining on the photosensitive drum 1 without being transferred onto the sheet 12 is collected by the cleaning blade 6.
- the transfer residual toner collected by the cleaning blade 6 is accommodated in a removed developer accommodating portion (hereinafter referred to as a waste toner accommodating portion) 14a through the opening 14b.
- the waste toner container 14 a and the cleaning blade 6 are integrated to form a cleaning unit (photosensitive unit, image carrier unit) 13.
- the process cartridge 7 is configured by unitizing the developing unit 4 and the cleaning unit 13 into a unit (cartridge).
- the image forming apparatus 100 includes a guide (positioning means) such as a mounting guide and a positioning member (not shown) in the main body frame.
- the process cartridge 7 is guided by the above-described guide, and is configured to be detachable from the image forming apparatus main body (electrophotographic image forming apparatus main body) 100A.
- Each color process cartridge 7 contains toner of each color of yellow (Y), magenta (M), cyan (C), and black (K).
- the intermediate transfer belt 5 abuts on the photosensitive drum 1 provided in each process cartridge and rotates (moves) in the direction of arrow B in FIG.
- the intermediate transfer belt 5 is stretched around a plurality of support members (a driving roller 51, a secondary transfer counter roller 52, and a driven roller 53).
- a driving roller 51, a secondary transfer counter roller 52, and a driven roller 53 On the inner peripheral surface side of the intermediate transfer belt 5, four primary transfer rollers 8 as primary transfer means are arranged in parallel so as to face the respective photosensitive drums 1.
- a secondary transfer roller 9 as a secondary transfer unit is disposed at a position facing the secondary transfer counter roller 52 on the outer peripheral surface side of the intermediate transfer belt 5.
- the surface of the photosensitive drum 1 is uniformly charged by the charging roller 2.
- the surface of the charged photosensitive drum 1 is scanned and exposed by laser light corresponding to image information emitted from the scanner unit 3.
- an electrostatic latent image corresponding to the image information is formed on the photosensitive drum 1.
- the electrostatic latent image formed on the photosensitive drum 1 is developed as a toner image by the developing unit 4.
- the photosensitive drum is a rotating body (image carrier) that rotates in a state where an image (developer image, toner image) formed with a developer (toner) is carried on the surface thereof.
- the toner image formed on the photosensitive drum 1 is transferred (primary transfer) onto the intermediate transfer belt 5 by the action of the primary transfer roller 8.
- the above-described process is sequentially performed in four process cartridges 7 (7Y, 7M, 7C, and 7K). Then, the toner images of the respective colors formed on the photosensitive drums 1 of the respective process cartridges 7 are primarily transferred sequentially so as to be superimposed on the intermediate transfer belt 5. Thereafter, the recording material 12 is conveyed to the secondary transfer portion in synchronization with the movement of the intermediate transfer belt 5. Then, the four-color toner images on the intermediate transfer belt 5 are collectively transferred onto the recording material 12 conveyed to the secondary transfer portion formed by the intermediate transfer belt 5 and the secondary transfer roller 9.
- the recording material 12 onto which the toner image has been transferred is conveyed to a fixing device 10 as fixing means.
- the toner image is fixed on the recording material 12 by applying heat and pressure to the recording material 12 in the fixing device 10.
- the primary transfer residual toner remaining on the photosensitive drum 1 after the primary transfer process is removed by the cleaning blade 6 and collected as waste toner. Further, the secondary transfer residual toner remaining on the intermediate transfer belt 5 after the secondary transfer step is removed by the intermediate transfer belt cleaning device 11.
- the image forming apparatus 100 can also form a single-color or multi-color image using a desired single or several (not all) image forming units. [Outline of process cartridge]
- FIG. 7 An outline of the process cartridge 7 (cartridge 7) mounted on the image forming apparatus main body 100A of this embodiment will be described with reference to FIGS. 2, 3, 4, and 5.
- FIG. 1 An outline of the process cartridge 7 (cartridge 7) mounted on the image forming apparatus main body 100A of this embodiment will be described with reference to FIGS. 2, 3, 4, and 5.
- FIG. 1 An outline of the process cartridge 7 (cartridge 7) mounted on the image forming apparatus main body 100A of this embodiment will be described with reference to FIGS. 2, 3, 4, and 5.
- the cartridge 7a containing yellow toner, the cartridge 7b containing magenta toner, the cartridge 7c containing cyan toner, and the cartridge 7d containing black toner have the same configuration. Accordingly, in the following description, the cartridges 7a, 7b, 7c, and 7d are collectively referred to as the cartridge 7. Similarly, each cartridge constituent member will be described generically.
- FIG. 2 is an external perspective view of the process cartridge 7.
- the rotation axis direction of the photosensitive drum 1 is the Z direction (arrow Z1, arrow Z2)
- the horizontal direction in FIG. 1 is the X direction (arrow X1, arrow X2)
- the vertical direction in FIG. Is the Y direction (arrow Y1, arrow Y2).
- FIG. 3 is a schematic cross-sectional view of the process cartridge 7 mounted in the image forming apparatus 100 and viewed along the Z direction in a state (posture) in which the photosensitive drum 1 and the developing roller 17 are in contact with each other.
- the process cartridge 7 includes two units: a cleaning unit 13 in which the photosensitive drum 1, the charging roller 2, and the cleaning blade 6 are unitized, and a developing unit 4 having a developing member such as the developing roller 17.
- the developing unit 4 includes a developing frame 18 that supports various elements in the developing unit 4.
- the developing unit 4 is provided with a developing roller 17 as a developer carrying member that contacts the photosensitive drum 1 and rotates in the direction indicated by an arrow D (counterclockwise).
- the developing roller 17 is rotatably supported by the developing frame 18 via the developing bearings 19 (19R, 19L) at both ends in the longitudinal direction (rotational axis direction).
- the developing bearings 19 (19R, 19L) are respectively attached to both side portions of the developing device frame 18.
- the developing unit 4 includes a developer storage chamber (hereinafter, toner storage chamber) 18a and a development chamber 18b in which the developing roller 17 is disposed.
- toner storage chamber hereinafter, toner storage chamber
- development chamber 18b in which the developing roller 17 is disposed.
- a toner supply roller 20 as a developer supply member that contacts the developing roller 17 and rotates in the direction of arrow E
- a developing blade 21 as a developer regulating member for regulating the toner layer of the developing roller 17 are provided. Is arranged.
- the developing blade 21 is fixed and integrated with the fixing member 22 by welding or the like.
- a stirring member 23 for stirring the stored toner and conveying the toner to the toner supply roller 20 is provided.
- the developing unit 4 is rotatably coupled to the cleaning unit 13 around a fitting shaft 24 (24R, 24L) fitted in the holes 19Ra and 19La provided in the bearing members 19R and 19L.
- the developing unit 4 is urged in a direction in which the developing roller 17 is in contact with the photosensitive drum 1 by a pressure spring 25 (25R, 25L). Therefore, when the process cartridge 7 forms an image, the developing unit 4 rotates (rotates) about the fitting shaft 24 in the direction of arrow F, and the photosensitive drum 1 and the developing roller 17 come into contact with each other.
- the cleaning unit 13 has a cleaning frame 14 as a frame that supports various elements in the cleaning unit 13.
- 4 and 5 are cross-sectional views taken along a virtual plane along the rotational axis of the photosensitive drum 1 of the process cartridge 7.
- the side on which the coupling unit (coupling member) 28 receives driving force from the image forming apparatus main body is called the driving side of the process cartridge 7.
- the side opposite to the driving side is referred to as the non-driving side of the process cartridge 7.
- the driving side of the cartridge 7 is disposed on the back side of the mounting portion, and the non-driving side of the cartridge 7 is disposed on the near side of the mounting portion.
- an electrode (electrode part) that comes into contact with the inner surface of the photosensitive drum 1, and this electrode is in contact with the image forming apparatus main body. By playing the role of earth.
- a coupling unit 28 is attached to one end of the photosensitive drum 1, and a non-driving side flange member 29 is attached to the other end of the photosensitive drum 1 to form a photosensitive drum unit 30.
- the photosensitive drum unit 30 obtains a driving force from the main body driving shaft 101 provided in the image forming apparatus main body 100A via the coupling unit 28 (the driving force is transmitted from the main body driving shaft 101).
- the coupling unit 28 can be engaged with the main body drive shaft 101 as the cartridge 7 is attached to the apparatus main body 100A.
- the coupling unit 28 can be detached from the main body drive shaft 101 when the cartridge 7 is removed from the apparatus main body 100A.
- the coupling unit 28 is configured to be able to be coupled to and detached from the main body drive shaft 101.
- the coupling unit 28 has a flange member 71 (drive side flange member) attached to the drive side end of the photosensitive drum 1.
- the Z1 side of the coupling unit 28 has a cylindrical shape (cylindrical portion 71a).
- the cylindrical portion 71 a protrudes from the end of the photosensitive drum 1 toward the Z1 side (outside in the axial direction).
- a portion near the tip on the Z1 side is a bearing portion 71c.
- the supported portion 71c is rotatably supported by a bearing portion provided on the drum unit bearing member 39R.
- the photosensitive drum unit 30 can be rotated by the bearing portion 71c being supported by the bearing portion of the drum unit bearing member 39R.
- the non-driving side flange member 29 provided on the non-driving side of the photosensitive drum unit 30 is rotatably supported by the drum unit bearing member 39L.
- the non-driving side flange member 29 has a cylindrical portion (cylindrical portion) protruding from the end portion of the photosensitive drum 1, and the outer peripheral surface of the cylindrical portion 29a is rotatably supported by the drum unit bearing member 39L.
- the drum unit bearing member 39R is disposed on the driving side of the process cartridge 7, and the drum unit bearing member 39L is disposed on the non-driving side of the process cartridge 7.
- the drum unit bearing member 39R abuts on the back side cartridge positioning portion 108 provided on the image forming apparatus main body 100A. Further, the drum unit bearing member 39L comes into contact with the front cartridge positioning portion 110 of the image forming apparatus main body 100A. As a result, the cartridge 7 is positioned on the image forming apparatus 100A.
- the position where the drum unit bearing member 39R supports the bearing portion 71c is close to the position where the drum unit bearing member 39R is positioned by the back side cartridge positioning portion 108. Placed in position. By doing so, it is possible to prevent the coupling unit 28 from being inclined when the process cartridge 7 is mounted on the apparatus main body 100A.
- the bearing part 71c is arranged so that the position where the bearing member 39R supports the bearing part 71c and the position where the bearing member 39R is positioned by the back side cartridge positioning part 108 can be brought close to each other. That is, the bearing portion 71c is disposed on the distal end side (Z1 direction side) of the outer peripheral surface of the cylindrical portion 71a provided in the coupling unit 28.
- the drum unit bearing member 39 ⁇ / b> L is positioned by the front cartridge positioning portion 110 at a position where the drum unit bearing member 39 ⁇ / b> L rotatably supports the non-driving side flange member 29 in the Z direction. Arranged at a position close to the position. This prevents the non-driving side flange member 29 from tilting.
- Drum unit bearing members 39R and 39L are attached to both sides of the cleaning frame 14 and support the photosensitive drum unit 30, respectively. As a result, the photosensitive drum unit 30 is rotatably supported by the cleaning frame 14.
- charging roller 2 and the cleaning blade 6 are attached to the cleaning frame 14, and these are arranged so as to come into contact with the surface of the photosensitive drum 1.
- charging roller bearings 15 (15R, 15L) are attached to the cleaning frame 14.
- the charging roller bearing 15 is a bearing for supporting the shaft of the charging roller 2.
- the charging roller bearing 15 (15R, 15L) is attached to be movable in the direction of arrow C shown in FIG.
- the rotating shaft 2a of the charging roller 2 is rotatably attached to the charging roller bearing 15 (15R, 15L).
- the charging roller bearing 15 is urged toward the photosensitive drum 1 by a pressure spring 16 as urging means. As a result, the charging roller 2 comes into contact with the photosensitive drum 1 and rotates following the photosensitive drum 1.
- the cleaning frame 14 is provided with a cleaning blade 6 as a cleaning means for removing toner remaining on the surface of the photosensitive drum 1.
- the cleaning blade 6 is formed by integrating a blade-like rubber (elastic member) 6a that contacts the photosensitive drum 1 and removes toner on the photosensitive drum 1, and a support metal plate 6b that supports the rubber.
- the support metal plate 6b is fixed and attached to the cleaning frame 14 with screws.
- the cleaning frame 14 has the opening 14b for collecting the transfer residual toner collected by the cleaning blade 6.
- the opening 14b is provided with a blowout prevention sheet 26 that contacts the photosensitive drum 1 and seals between the photosensitive drum 1 and the opening 14b, and suppresses toner leakage in the upper direction of the opening 14b.
- FIG. 6 is an external view of the main body drive shaft.
- FIG. 7 is a cross-sectional view taken along the rotation axis (rotation axis) of the main body drive shaft 101 in a state of being attached to the image forming apparatus main body.
- FIG. 8 is a perspective view of the main body drive shaft.
- FIG. 9 is a cross-sectional view of the coupling 28 and the main body drive shaft 101 cut along the rotation axis (rotation axis).
- FIG. 10 is a cross-sectional view of the coupling unit 28 and the main body drive shaft 101 cut in the direction perpendicular to the rotation axis.
- the main body drive shaft 101 has a gear part 101e, a shaft part 101f, a rough guide part 101g, and a bearing part 101d.
- the image forming apparatus main body 100A is provided with a motor (not shown) as a drive source.
- the gear unit 101e obtains rotational drive from this motor, and the main body drive shaft 101 rotates.
- the main body drive shaft 101 includes a rotatable shaft portion 101f that protrudes toward the cartridge side from the gear portion 101e along the rotation axis.
- the rotational driving force received from the motor is transmitted to the cartridge 7 side through a groove-shaped drive transmission groove 101a (concave portion, drive passing portion) provided in the shaft portion 101f.
- the shaft portion 101f has a hemispherical shape 101c at the tip thereof.
- the main body drive transmission groove 101a has a shape into which a part of an engaging portion 65a of the coupling unit 28 described later can enter.
- the main body drive transmission surface 101b is provided as a surface that contacts the driving force receiving surface (driving force receiving portion) 65b of the coupling unit 28 and transmits the driving force.
- the main body drive transmission surface 101 b is not a flat surface but has a shape twisted around the rotation axis of the main body drive shaft 101.
- the twist direction is a direction in which the Z1 direction side of the main body drive shaft 101 is arranged on the upstream side in the rotation direction of the main body drive shaft 101 with respect to the Z2 direction side.
- the amount of twist is about 1 ° per mm along the rotation axis direction of the cylinder of the engaging portion 65a. The reason why the main body drive transmission surface 101b has a twisted shape will be described later.
- a main body side removal taper 101i is provided on the surface on the Z2 direction side of the main body drive transmission groove 101a.
- the main body-side extraction taper 101i is a taper (inclined surface, inclined portion) for helping the engagement portion 65a to come out of the drive transmission groove 101a when the process cartridge 7 is removed from the apparatus main body 100A. Details will be described later.
- the main body drive transmission groove 101a has a gap (G) with respect to the engagement portion 65a in each of the rotation axis direction, the circumferential direction, and the radial direction so that surfaces other than the main body drive transmission surface 101b do not contact the engagement portion 65a. ) Is employed (see FIGS. 9 and 10).
- the center 101h of the hemispherical shape 101c is disposed within the range of the main body drive transmission groove 101a (see FIG. 7).
- the center 101h and the main body drive transmission groove 101a are projected onto the axis of the main body drive shaft 101 on the axis of the main body drive shaft 101, the center 101h is projected inside the projection area of the main body drive transmission groove 101a on the axis. An area is placed.
- the axis of the main body drive shaft and the drum unit means a virtual straight line extending through the rotation center of the shaft.
- the axial direction means the direction in which the axial line extends.
- the axial direction of the drum unit 30 has the same meaning as the longitudinal direction (Z direction) of the drum unit 30.
- X and Y overlap (overlap) in the A direction means that when X and Y are projected onto a straight line extending in parallel with the A direction, at least a part of the projected region of X on the straight line. Means that it overlaps at least a part of the Y projection area.
- the projection direction is a direction perpendicular to the line unless otherwise specified.
- “projecting A onto an axis” means “projecting A in a direction perpendicular to the axis with respect to the axis”.
- the rough guide portion 101g of the main body drive shaft 101 is provided between the shaft portion 101f and the gear portion 101e in the axial direction (see FIG. 6).
- the rough guide portion 101g has a tapered shape at the tip on the shaft portion 101f side, and the outer diameter D6 of the rough guide portion 101g is an inner peripheral surface of a cylindrical portion 71a of the coupling unit 28 described later, as shown in FIG. It is smaller than the inner diameter D2 of 71b. Further, the outer diameter D6 of the rough guide portion 101g is larger than the outer diameter D5 of the shaft portion 101f as shown in FIG.
- the main body drive shaft 101 is connected to the coupling unit 28 so as to reduce the axial deviation between the rotation center of the cylindrical portion 71 and the rotation center of the shaft portion 101f.
- the rough guide portion 101g is set to have a dimensional relationship that does not contact the inner peripheral surface 71b.
- the bearing portion 101d of the main body drive shaft 101 is disposed on the opposite side of the rough guide portion 101g with the gear portion 101e interposed therebetween.
- the supported portion 101d is rotatably supported (supported) by a bearing member 102 provided in the image forming apparatus main body 100A.
- the main body drive shaft 101 is biased toward the cartridge 7 by the spring member 103 of the image forming apparatus main body 100A.
- the movable amount (backlash) of the main body drive shaft 101 in the Z direction is about 1 mm, which is sufficiently smaller than the width in the Z direction of a driving force receiving surface 65b described later.
- the main body drive shaft 101 is provided with the main body drive transmission groove 101a, the coupling unit 28 is provided with the engaging portion 65a, and the drive is transmitted from the apparatus main body 100A to the cartridge 7 (drum unit 30).
- the engaging portion 65a is biased by a biasing member that is a compression spring that can elastically expand and contract. Therefore, the engaging portion 65a is movable at least radially outward of the drum unit 30 when the cartridge 7 is mounted on the apparatus main body 100A. Thus, as the cartridge 7 is inserted into the apparatus main body 100A, the engaging portion 65a enters the drive transmission groove 101a, and the engaging portion 65a and the main body drive transmission groove 101a can be engaged.
- a biasing member that is a compression spring that can elastically expand and contract. Therefore, the engaging portion 65a is movable at least radially outward of the drum unit 30 when the cartridge 7 is mounted on the apparatus main body 100A.
- the radial direction of the drum unit 30 may be simply referred to as the radial direction.
- the radial direction of the drum unit 30 is the radial direction of the photosensitive drum 1 and also the radial direction of the coupling unit 28. [Composition of coupling unit]
- FIG. 11 is a drive-side perspective view of the drum unit 30 in which the coupling unit 28 is attached to the photosensitive drum 1.
- FIG. 12 is a drive side sectional view of the drum unit 30.
- FIG. 13 is a perspective view of the engaging member 65
- FIG. 13 (a) is a perspective view seen from the upper left
- FIG. 13 (b) is a perspective view seen from the upper right.
- FIG. 14 is a perspective view of members constituting the coupling unit 28.
- FIG. 15 is a cross-sectional view perpendicular to the rotation axis of the coupling unit 28.
- the coupling unit 28 is provided with three engaging portions 65 a that engage with the main body drive shaft 101.
- the engaging portion 65a enters the groove portion 101a of the main body driving shaft 101 as shown in FIG. 10, and the driving force receiving surface 65b of the engaging portion 65a and the driving transmission surface 101b of the main body driving shaft 101 come into contact with each other.
- FIG. 12 is a cross-sectional view of the state in which the coupling unit 28 is attached to the photosensitive drum 1.
- the engaging member 65 having the engaging portion 65 a is supported in the coupling unit 28 in a state of being urged by the urging member 66 toward the inside in the radial direction of the coupling unit 28.
- the coupling unit 28 includes a flange member 71, a flange cap member 72, an engagement member 65, and an urging member 66, as shown in the cross-sectional view of FIG. 12 and the perspective view of FIG.
- the flange member 71 is attached to the inner periphery of the photosensitive drum 1 and is fixed to the photosensitive drum 1.
- the flange member 71 is substantially cylindrical and has a hollow portion.
- the flange member 71 is opened toward the outside in the axial direction of the drum unit.
- the flange cap member 72 is attached to the inner surface of the hollow portion of the flange member 71.
- the flange cap member 72 closes the inner side (bottom side) of the flange member 71 in the axial direction of the drum unit.
- the flange cap member 72 is fixed to the photosensitive drum 1 via the flange member 71.
- the engaging member 65 is held by the flange cap member 72 so as to be movable (slidable), and is configured to be movable (slidable) with respect to the flange cap member 72.
- the urging member 66 is an elastic member (spring member), and is configured to urge the engagement member 65 at least toward the inside in the radial direction of the drum unit.
- the flange member 71, the flange cap member 72, the engagement member 65, and the biasing member 66 are configured as separate bodies (separate members).
- the engaging member 65 is configured to be movable along the radial direction of the coupling unit (substantially parallel to the radial direction). Further, the engaging member 65 and the urging member 66 are arranged along the radial direction. That is, both the engaging member 65 and the urging member 66 are arranged on an imaginary line parallel to the radial direction of the coupling unit.
- the engaging member 65 has an engaging portion 65a protruding inward in the radial direction and a driving force receiving surface 65b formed on the engaging portion 65a.
- the engagement member 65 has a drive shaft contact surface (drive shaft contact portion) 65c formed adjacent to the drive force receiving surface 65b and formed in an arc shape so as to contact the outer peripheral surface 101f of the main body drive shaft.
- the driving force receiving surface 65b is a driving force receiving portion that receives the driving force from the main body driving shaft 101 by contacting the driving groove 101a.
- the engaging portion 65 a is a protruding portion (projecting portion) that protrudes (projects) from the surface of the engaging member 65.
- the engaging member 65 is a driving force receiving member provided with a driving force receiving portion (driving force receiving surface 65b), and is also a support member for supporting the driving force receiving surface 65b.
- the engaging member 65 has a first guided surface 65d and a second guided surface 65e to be guided (guided) so as to be movable in the radial direction in the coupling unit.
- the first guided surface 65d is a position restricting portion for restricting the position of the engaging member 65 in the circumferential direction, and is disposed on the side closer to the engaging portion 65a.
- the second guided surface 65e is also a position restricting portion for restricting the position of the engaging member 65 in the circumferential direction, and is disposed on the side far from the engaging portion 65a.
- the first guided surface 65d and the second guided surface 65e are guided portions guided by a flange cap member 72 described later.
- the first guided surface 65d and the second guided surface 65e are regulated portions whose positions in the rotation direction (circumferential direction) of the drum unit are regulated by the flange cap member 72.
- the first guided surface 65d is an upstream guided portion (and an upstream regulated portion) located on the downstream side of the engaging member 65 in the rotation direction of the coupling unit.
- the second guided surface 65e is a downstream guided portion (and downstream regulated portion) located on the upstream side of the engaging member 65 in the rotation direction.
- the first guided surface 65d and the second guided surface 65e are substantially parallel to each other.
- the third guided surface 65f and the fourth guided surface 65g are guided portions guided by a flange cap member 72 described later. Further, the third guided surface 65f and the second guided surface 65g are regulated portions whose positions in the axial direction (longitudinal direction) of the drum unit are regulated by the flange cap member 72.
- the third guided surface 65f is an outer guided portion (and an outer regulated portion) located outside the engaging member 65 in the axial direction of the drum unit.
- the fourth guide surface 65g is a downstream guided portion (and a downstream regulated portion) located on the downstream side of the engaging member 65 in the axial direction.
- the third guided surface 65f and the fourth guiding surface 65e are substantially parallel to each other.
- the engaging member 65 has a contact surface (biased portion, biased surface) 65h (FIG. 10) for receiving the biasing force by the biasing member 66. Further, the engaging member 65 has a position restricting projection 65 i that abuts against the flange cap member 72 and restricts the position of the engaging member 65 by the urging force of the urging member 66. In particular, an urging force position restricting surface (locked portion) 65j formed on the position restricting protrusion is brought into contact with the flange cap member 72. The position restricting protrusions 65i are provided on both sides of the engaging member 65 with the contact surface 65h with the biasing member 66 interposed therebetween.
- the engaging member 65 has an insertion tapered surface 65k on the outer side (Z1 direction side) of the photosensitive drum unit 30 in the Z direction.
- the insertion taper surface 65k is an inclined portion facing outward in the axial direction.
- the insertion tapered surface 65k is a mounting force receiving portion that receives a force for retracting the engaging member 65 in the radial direction when the cartridge is mounted.
- the engaging member 65 has an extraction taper portion 65l as a force receiving portion at the time of removal inside the photosensitive drum unit 30 in the Z direction (Z2 direction side).
- the removal taper surface 65l is a removal force receiving portion that receives a force for retracting the engagement member 65 in the radial direction when the cartridge is removed.
- the flange cap member 72 has a coupling hole 72a for allowing the main body drive shaft 101 to pass therethrough and an attachment hole 72b for supporting the engaging member 65 so as to be movable in the radial direction.
- the mounting hole 72b has a first guide surface 72d that contacts the first guided surface 65d that is a surface that restricts the position of the engaging member 65 in the circumferential direction, and a second guide that contacts the second guided surface 65e.
- a guide surface 72e is provided.
- the mounting hole 72b has a third guide surface 72f that contacts the third guided surface 65f that is a surface that restricts the position of the engaging member 65 in the axial direction, and a third surface that is a surface facing the third guided surface. It has the 4th guide surface 72g contact
- the first guide surface 72d, the second guide surface 72e, the third guide surface 72f, and the fourth guide surface 72g are guide portions for guiding the engaging member 65, respectively, and for restricting the position of the engaging member. It is also a regulation part (position regulation part).
- the first guide surface 72d is an upstream guide (upstream restriction portion) that guides the upstream side of the engaging member 65 in the rotation direction of the drum unit and restricts the position.
- the second guide surface 72e is a downstream guide (downstream restricting portion) on the downstream side of the engaging member 65.
- the engaging member 65 and the urging member 66 are disposed in a space between the first guide surface 72d and the second guide surface 72e.
- the third guide surface 72f is an outer guide portion (outer restricting portion) that guides the outside of the engaging member 65 in the axial direction of the drum unit and restricts the position.
- the fourth guide surface 72g is an inner guide portion (inner restriction portion) that guides the inner side of the engagement member 65 in the axial direction and performs position restriction.
- the flange cap member 72 is a guide member that guides the engaging member 65 by these guide portions (the first guide surface 72d, the second guide surface 72e, the third guide surface 72f, and the fourth guide surface 72g).
- the flange cap member 72 is a holding member that holds the engaging member 65 so as to be movable (can be guided).
- the first guide surface 72d and the second guide surface 72e are substantially parallel to each other.
- the third guide surface 72f and the fourth guide surface 72g are substantially parallel to each other.
- the engaging member 65 is a moving member that is movably held by the flange cap member 72 and is also a slide member that is slidable with respect to the flange cap member 72.
- the flange cap member 72 has a restricting surface (locking portion) 72j.
- the restricting surface (locking portion) 72j abuts against the biasing force position restricting surface (diameter stop portion) 65j, thereby restricting the engagement member 65 from moving inward in the radial direction. That is, the restricting surface (locking portion) 72j locks the locking member 65 against the biasing force of the biasing member 66.
- the locking member 65 is biased / pressed toward the regulating surface 72j by the biasing force of the biasing member 66. Will be.
- the flange cap member 72 has a fitting surface 72k that fits with the inner peripheral surface of the flange member 71, and a position restricting groove 72l for restricting the position of the flange member 71 in the rotational direction. Further, the flange cap member 72 has a conical surface 72 m that contacts the hemispherical shape 101 c of the main body drive shaft 101 and positions the main body drive shaft 101 with respect to the flange cap member 72.
- the positioning portion does not have to be a conical depression like the conical surface 72m.
- the shapes thereof are not limited. .
- these are preferably depressions (recesses) that are recessed toward the bottom.
- a non-conical pyramid shape such as a pyramid (such as a quadrangular pyramid) can be used.
- the position of the coupling unit 28 can be maintained with a particularly high precision if it is a conical recess symmetrical to the axis of the coupling unit 28 as in the conical shape 72m of the present embodiment.
- the conical shape 72m only needs to have a region for contacting the main body drive shaft 101, the region that does not contact may have any shape.
- the bottom portion of the unnecessary conical shape 72m is not necessary for the portion that does not contact the main body drive shaft 101, and the conical shape 72m may be a recess having a bottom.
- the flange member 71 has a fitting portion 71d for the photosensitive drum and a flange portion 71e formed at an end portion in the axial direction of the fitting portion. Furthermore, the flange member 71 has a cylindrical portion 71a that further extends in the axial direction from the flange portion 71e. The cylindrical portion 71a is formed with an inner peripheral surface 71b through which the main body drive shaft 101 passes and a bearing portion 71c supported by the bearing member. As shown in FIG. 14, the flange portion 71 e has a shape protruding outward from the fitting portion 71 d in the radial direction.
- the fitting portion 71d of the flange member 71 is press-fitted into the inner diameter of the cylinder of the photosensitive drum 1 as shown in FIG.
- the coupling unit 28 is moved by causing the flange member 71 to enter the cylinder in the axial direction until the flange portion 71e of the flange member 71 contacts the end surface of the photosensitive drum, and press-fitting the fitting portion 71d into the photosensitive drum 1. Is accurately positioned with respect to the photosensitive drum 1.
- the cylinder inner diameter of the photosensitive drum 1 and the outer shape of the fitting portion 71d adopt dimensions that have an interference fit relationship.
- caulking refers to an operation of joining a part of a plurality of parts by plastic working.
- the fixing method by caulking is an example of means for firmly fixing the flange member 71 to the photosensitive drum 1, and another fixing means such as fixing between the cylinder inner diameter and the fitting portion 71d is used. You can also
- the cylindrical portion 71a of the flange member 71 has the bearing portion 71c on the distal end side (Z1 direction side) of the outer peripheral surface (shown in FIGS. 4 and 9).
- the coupling unit has a bearing portion 71c having a cylindrical outer shape on the Z1 direction side (axial direction outer side) with respect to the engaging member.
- the engaging portion 65 a is not exposed to the outer surface of the cartridge 7.
- the engaging part 65a of the engaging member 65 can be protected by the drum unit bearing member 39R and the bearing part 71c. As a result, it is possible to prevent the user from unintentionally touching the engaging portion 65a, or to prevent something from directly hitting the engaging portion 65a when the cartridge 7 falls.
- the inner peripheral surface 71b of the cylindrical portion 71 has a tapered shape 71g at the front end (Z1 direction).
- the tapered shape 71 g is an inclined portion (inclined surface) for guiding the main body drive shaft 101 inserted into the cylindrical portion 71.
- the urging member 66 is a compression coil spring that can elastically expand and contract, and exerts a reaction force in the direction in which the compression spring extends in contrast to the external force in the direction in which the compression spring contracts.
- the biasing member 66 may be configured to exert a biasing force radially inward on the engaging member 65 in addition to the compression coil spring as in the present embodiment.
- Such an urging member (elastic member, spring member) may be used.
- the urging member 66 is also possible to make integral with the engaging member 65 or the flange cap member 72.
- the urging member 66 is configured separately from the engaging member 65 and the flange cap member 72. By doing so, the degree of freedom in selecting the urging member 66 is increased, and it becomes easier to select an appropriate urging member 66. For example, it becomes easy to select a biasing member 66 having a biasing force (elastic force) suitable for biasing the engaging member 65.
- FIG. 15 is a cross-sectional view perpendicular to the axial direction of the coupling unit.
- the first guided surface 65d and the second guided surface 65e of the engaging member 65 abut on and guide the first guiding surface 72d and the second guiding surface 72e of the flange cap member 72, respectively.
- the third guided surface 65f and the fourth guide surface 65g of the engaging member 65 abut against and guide the third guide surface 72f and the fourth guide surface 72g of the flange cap member 72, respectively.
- the engaging member 65 is guided and supported so as to be movable at least in the radial direction with respect to the flange cap member 72. That is, the vector along the direction in which the engaging member 65 moves has at least a component in the radial direction of the drum unit. In the present embodiment, the engaging member 65 can move substantially in parallel with the radial direction.
- the engaging member 65 is urged radially inward of the coupling unit 28 by the urging member 66. Since the urging member 66 is compressed while being sandwiched between the contact surface 65h of the engaging member 65 and the inner peripheral surface of the flange member 71, the urging member 66 exerts an urging force in the direction in which the urging member 66 extends.
- the joint member 65 is biased.
- the position of the engaging member 65 is regulated by the position regulating surface 65j of the engaging member 65 and the regulating surface 72j of the flange cap member 72 coming into contact with the urging force.
- the engaging member 65 is supported by the flange cap member 72 in a state where the engaging portion 65 a of the engaging member 65 is exposed from the hole portion 72 a of the flange cap member 72.
- the drive shaft abutting surface 65 c formed in an arc shape on the engaging member 65 is also exposed from the hole 72 a of the flange cap member 72.
- the engaging portion 65 a of the engaging member 65 protrudes radially inward from the inner peripheral surface of the hole portion 72 a of the flange cap member 72.
- the protrusion amount of the engagement portion 65a protruding from the drive shaft abutment surface 65c of the engagement member 65 is such that the engagement portion 65a surely enters the groove 101a of the drive shaft. Further, the amount of protrusion is such that the driving force receiving surface 65b formed in the engaging portion 65a has a strength corresponding to the load torque of the photosensitive drum unit 30 which is a member to be rotated. That is, it is only necessary that the driving force receiving surface 65 b of the engaging portion 65 a can stably transmit the driving force from the main body driving shaft 101.
- the engagement portion when the distance from the inner surface of the flange cap member 72 to the tip of the engagement portion 65a is measured along the radial direction of the coupling unit, the engagement portion is set so that the distance is 1 mm to 3 mm. A protrusion amount of 65a was defined.
- the drive shaft abutting surface 65c of the engaging member 65 protrudes radially inward from the inner peripheral surface of the hole (hollow portion) 72a of the flange cap member 72.
- the protrusion amount (exposure amount) by which the drive shaft contact surface 65c protrudes from the inner peripheral surface of the hole portion 72a is such that the drive shaft contact surface 65c can be reliably inserted into the hole portion 72a even when the dimensions of each portion vary. It is desirable to protrude from the peripheral surface.
- the protrusion amount by which the drive shaft contact surface 65c protrudes from the inner peripheral surface of the hole 72a is preferably 0.3 mm to 1 mm. That is, when the distance from the inner surface of the flange cap member 72 to the drive shaft contact surface 65c is measured along the radial direction of the coupling unit, the distance is 0.3 mm to 1 mm.
- FIG. 16 The attachment / detachment of the process cartridge 7 to / from the image forming apparatus main body will be described with reference to FIGS. 16, 17, 18, and 19.
- FIG. 16 The attachment / detachment of the process cartridge 7 to / from the image forming apparatus main body will be described with reference to FIGS. 16, 17, 18, and 19.
- FIG. 16 The attachment / detachment of the process cartridge 7 to / from the image forming apparatus main body
- FIG. 16 is a perspective view for explaining mounting of the cartridge 7 to the image forming apparatus main body 100A.
- 17, 18 and 19 are cross-sectional views for explaining the mounting operation of the cartridge 7 to the image forming apparatus main body 100A.
- the image forming apparatus main body 100A of this embodiment employs a configuration in which a cartridge can be mounted in a substantially horizontal direction.
- the image forming apparatus main body 100A includes a space in which a cartridge can be mounted.
- a cartridge door 104 (front door) for inserting the cartridge into the above-described space is provided on the front side of the image forming apparatus main body 100A (the direction in which the user stands during use).
- the cartridge door 104 of the image forming apparatus main body 100A is provided to be openable and closable.
- the cartridge lower guide rail 105 for guiding the cartridge 7 is disposed on the bottom surface of the space, and the cartridge upper guide rail 106 is disposed on the upper surface.
- the cartridge 7 is guided to the mounting position by upper and lower guide rails (105, 106) provided above and below the space.
- the cartridge 7 is inserted into the mounting position substantially along the axis of the photosensitive drum unit 30.
- the drum unit bearing member 39R and the photosensitive drum 1 do not contact the intermediate transfer belt 5 at the start of insertion.
- the dimensional relationship is such that the photosensitive drum 1 and the intermediate transfer belt 5 are not in contact with each other while the end of the cartridge 7 in the insertion direction is supported by the cartridge lower guide rail 105.
- the image forming apparatus main body 100 ⁇ / b> A includes a back side cartridge lower guide 107 that protrudes upward in the gravity direction from the cartridge lower guide rail 105 on the back side in the insertion direction of the cartridge lower guide rail 105.
- the rear cartridge lower guide 107 includes a tapered surface 107 a on the front side in the insertion direction of the cartridge 7. With the insertion, the cartridge 7 rides on the taper surface 107a and is guided to the mounting position.
- the position and shape of the rear cartridge lower guide 107 may be provided so that a part of the cartridge does not slide on the image forming area 5A of the intermediate transfer belt 5 when the cartridge is inserted into the apparatus main body 100A.
- the image forming area 5A refers to an area where a toner image to be transferred to the recording material 12 of the intermediate transfer belt 5 is carried.
- the unit bearing member 39R provided on the back side in the insertion direction of the cartridge 7 protrudes most upward in the gravity direction.
- each element is appropriately selected so that the trajectory drawn at the end of the drum unit bearing member 39R on the innermost side in the insertion direction (hereinafter referred to as the insertion trajectory) does not interfere with the image forming region 5A. Good.
- the cartridge 7 is further inserted into the back side of the image forming apparatus main body 100A from the state where the cartridge 7 rides on the back side cartridge lower guide 107. Then, the drum unit bearing member 39R hits the back cartridge positioning portion 108 provided in the image forming apparatus main body 100A. At this time, the cartridge 7 (photosensitive drum unit 30) is tilted by about 0.5 to 2 ° from the state where the mounting of the image forming apparatus main body 100A is completed (FIG. 17D). That is, in the insertion direction of the cartridge 7, the downstream side of the cartridge 7 (photosensitive drum unit 30) is lifted from the upstream side.
- FIG. 19 is a view showing the state of the apparatus main body and the cartridge with the cartridge door 104 closed.
- the image forming apparatus 100 ⁇ / b> A has a front-side cartridge lower guide 109 on the front side in the insertion direction of the cartridge lower guide rail 105.
- the front cartridge lower guide 109 is configured to move up and down in conjunction with opening and closing of the cartridge door (front door) 104.
- the front cartridge lower guide 109 rises. Then, the drum unit bearing member 39L and the front cartridge positioning portion 110 of the image forming apparatus main body 100A come into contact with each other, and the cartridge 7 is positioned with respect to the image forming apparatus main body 100A.
- the cartridge 7 is completely attached to the image forming apparatus main body 100A.
- the removal of the cartridge 7 from the image forming apparatus main body 100A is in the reverse order of the above-described insertion operation. Since the oblique mounting configuration is employed as described above, sliding between the photosensitive drum 1 and the intermediate transfer belt 5 can be suppressed when the cartridge 7 is mounted on the apparatus main body 100A. Therefore, it is possible to suppress the occurrence of minute scratches (scratches) on the surface of the photosensitive drum 1 or the surface of the intermediate transfer belt 5.
- the configuration disclosed in the present embodiment can simplify the configuration of the image forming apparatus main body 100A as compared with the configuration in which the cartridge 7 is moved and mounted in the apparatus main body 100A in the horizontal direction and then the entire cartridge is lifted. . [The engagement process of the coupling unit to the drive shaft]
- FIG. 20 An engagement process between the coupling unit 28 and the main body drive shaft 101 will be described in detail with reference to FIGS. 20, 21, 22, 23, 24, 25, and 26.
- FIG. 20 An engagement process between the coupling unit 28 and the main body drive shaft 101 will be described in detail with reference to FIGS. 20, 21, 22, 23, 24, 25, and 26.
- 20, 21, and 22 are cross-sectional views for explaining the mounting operation of the coupling unit 28 to the main body drive shaft 101.
- FIG. 10 is a cross-sectional view for explaining the mounting operation of the coupling unit 28 to 101.
- FIG. 25 is a cross-sectional view showing the relationship of forces acting on the engaging member.
- FIG. 26 is an axial sectional view showing an engagement surface for driving transmission between the engagement member and the main body drive shaft.
- 21 and 23 are diagrams for explaining a state where the phases of the main body drive transmission groove 101a and the engaging portion 65 (drive force receiving surface 65b) are not matched.
- the cartridge 7 is mounted in the apparatus main body 100A as described above. Then, with the mounting operation of the cartridge, the coupling unit comes into contact with the hemispherical shape 101c formed at the tip of the main body drive shaft 101 and the inclined surface formed at the end of the rough guide portion 101g of the main body drive shaft. . As a result, the main body drive shaft 101 is guided to the inner surface 71b of the flange member 71 of the coupling unit.
- FIG. 20 shows a state in which the main body drive shaft 101 guided in this manner is in contact with the engaging member 65 of the coupling unit.
- the hemispherical shape 101 c of the main body drive shaft abuts on the insertion taper surface 65 k formed on the engagement member 65.
- the hemispherical shape 101c of the main body drive shaft is in contact with the conical surface 72m of the coupling unit, and the main body drive shaft 101 is positioned with respect to the coupling unit 28 in the axial direction and the radial direction.
- the engaging member 65 is guided by the first, second, third, and fourth guided surfaces of the engaging member 65 by the first, second, third, and fourth guiding surfaces of the flange cap member 72.
- the engaging portion tip is retracted in the radial direction until it comes into contact with the outer peripheral surface of the shaft portion 101f of the main body drive shaft. At this time, as shown in FIG.
- the regulating surface 65j for the biasing force of the engaging member 65 is separated from the regulating surface 72j of the flange cap member. Further, the urging member 66 is in a state of being further compressed and contracted as compared with the state of FIG. 15 in which the main body drive shaft 101 is not inserted into the coupling unit 28.
- FIG. 24 shows a state where the position restricting surface 65j of the engaging member is in contact with the restricting surface 72j of the flange cap member.
- the drive drum can be transmitted to the photosensitive drum 1.
- the engaging portion 65a of the engaging member engages with the main body drive shaft 101.
- the length L2 of the driving force receiving surface 65b is L1>. It arrange
- the conical shape 72m is arranged so that the center 101h of the hemispherical shape 101c is located within the range L2 of the driving force receiving surface 65b of the engaging member 65 in the Z direction.
- the center of the center 101h is arranged inside the projection region L2 of the driving force receiving surface 65b of the engaging portion 65a.
- the drum unit bearing member 39 ⁇ / b> R and the drum unit bearing member 39 ⁇ / b> L abut against the rear cartridge positioning unit 108 and the front cartridge positioning unit 110, respectively.
- the position of the cartridge 7 relative to the image forming apparatus main body 100A is determined.
- the relative positions of the main body drive shaft 101 and the coupling unit 28 are affected by component tolerances. Specifically, the position is shifted due to the influence of the component tolerance from the drum unit bearing member 39R to the coupling unit 28 and the component tolerance from the back side cartridge positioning portion 108 to the main body drive shaft 101. As shown in FIGS.
- the main body drive shaft 101 has a hemispherical shape 101c that abuts against the inverted conical shape 533a, and is configured to be supported at both ends by the bearing portion 101d and the hemispherical shape 101c. That is, the main body drive shaft 101 is inclined with respect to the center 101 h of the hemispherical shape 101 c as viewed from the coupling unit 28.
- the same position as the center 101h in the Z-axis direction is a position that is least affected by this tilting.
- the position where the driving force receiving surface 65b is arranged at the same position as the center 101h in the Z-axis direction is the position where the influence of the positional deviation can be minimized.
- the photosensitive drum 1 can be driven stably.
- the protrusion for receiving the driving force is provided on the engaging member 65 side.
- the engaging member is provided with a groove for receiving the driving force, and is moved radially to the main body driving shaft 101 side. It is also possible to provide a movable protrusion that can be engaged with the groove.
- the image forming apparatus main body 100A is required to have higher durability. In order to increase the durability of the image forming apparatus main body 100A, it is preferable to provide a movable portion (engagement portion 65) that moves in the radial direction on the coupling unit 28 side of the cartridge 7 as in this embodiment. [Driving of coupling unit by main body drive shaft]
- FIGS. 25 and 26 A configuration for transmitting the rotational driving force to the coupling unit 28 will be described with reference to FIGS. 25 and 26.
- the support structure of the engaging member 65 at the time of coupling drive will be described in detail.
- the drive transmission surface 101b formed in the groove 101a of the main body drive shaft is driven in the engaging portion 65a of the engaging member. It abuts on the force receiving surface 65b and exerts a force F in the normal direction of the driving force receiving surface 65b.
- the driving force F acts on the driving force receiving surface, the force causes the first guided surface 65d of the engaging member and the first guiding surface 72d of the flange cap to contact each other.
- the drive shaft contact surface 65c of the engaging member contacts the outer peripheral surface of the shaft portion 101f of the main body drive shaft.
- the engaging member 65 is firmly supported between the flange cap member 72 and the main body drive shaft 101.
- the driving force receiving surface 65b is inclined at least with respect to the moving direction S of the engaging member 65 so as to face at least the outer side in the radial direction. That is, the normal vector of the driving force receiving surface 65b (the vector extending perpendicularly to the driving force receiving surface 65b toward the side where the driving force receiving surface 65b faces) is an outward component in the coupling unit radial direction.
- the inner side in the radial direction of the driving force receiving surface 65b (the front end side of the engaging portion 65a) is more in the drum unit rotation direction than the outer side in the radial direction of the driving force receiving surface 65b (the rear end side of the engaging portion 65a).
- the direction in which the driving force F is generated is directed inward in the radial direction with respect to the circumferential direction (circumferential direction) of the coupling unit. It is inclined to.
- the driving force F is inclined so as to be directed radially inward with respect to the tangent line of the virtual circle. Therefore, the driving force F is divided into a force F1, which is a tangential component (circumferential component, rotational component) along the tangent of the virtual circle, and a force F2, which is a radial component toward the inside in the radial direction. .
- the driving force receiving surface 65b of the engaging member is biased radially inward by the force F2 acting on the driving force receiving surface 65b. Since it is possible to suppress the driving force receiving surface 65b from moving outward in the radial direction, it is also possible to suppress the driving force receiving surface 65b from canceling the contact state with the drive transmission surface 101b of the main body driving shaft. it can.
- the moving direction S in which the engaging member is guided radially inward so as to be movable to the flange cap member with respect to the direction of the force F acting in the normal direction of the driving force receiving surface is a direction inclined by an angle ⁇ . is there.
- a component FS acting in the moving direction S of the engaging member is generated as shown in FIG.
- This force FS prevents the engagement member 65 from moving in the direction opposite to the moving direction S, and the drive force receiving surface 65b of the engagement member engagement member is disengaged from the drive transmission surface 101b of the main body drive shaft and falls off. Can be prevented.
- the direction of the driving force receiving surface 65b is inclined in the direction in which the driving force receiving surface 65b bites into the driving transmission surface 101b of the main body driving shaft with respect to the moving direction of the engaging member 65.
- the drive shaft contact surface 65c of the engaging member may be contacted with the outer peripheral surface of the shaft portion 101f of the main body drive shaft.
- the drive shaft contact surface 65c is provided on the opposite side of the direction of the drive force F with respect to the drive force receiving surface 65b.
- the engagement member 65 can be supported more firmly by supporting the rotational moment M generated in the engagement member 65 by the force F acting on the drive force receiving surface by the drive shaft contact surface 65c.
- the drive shaft contact surface 65c of the engaging member protrudes radially inward from the hole inner peripheral surface 72a of the flange cap member. Thereby, even when the dimensions of each part and the assembling accuracy vary, the drive shaft contact surface 65c can be reliably contacted with the outer peripheral surface of the drive shaft 101f.
- the engaging member 65 is firmly supported between the flange cap member 72 and the main body drive shaft 101. As a result, the engaging member 65 is prevented from being detached from the main body driving shaft 101 and falling off, and the driving force from the main body driving shaft 101 can be stably transmitted to the engaging member 65. Then, it is possible to improve the driving stability of the photosensitive drum 1 and improve the image quality. Next, the inclination in the axial direction of the driving force receiving surface 65b of the engaging portion will be described. FIG.
- FIG. 26 is a cross-sectional view of the engaging portion 65a of the engaging member taken along a surface extending in the normal direction of the driving force receiving surface 65b. That is, it is a sectional view cut in the direction of the arrow of the force F in FIG.
- the main body drive transmission surface 101b formed in the drive transmission groove 101a of the main body drive shaft 101 and the driving force receiving surface 65b formed in the engaging portion 65a of the engaging member abut, and the main body drive shaft 101 A driving force is transmitted to the engaging member 65.
- the main body drive transmission surface 101b has a shape twisted about the axis of the coupling unit 28, and the main body drive transmission surface 101b is in relation to the rotation axis of the main body drive shaft 101 in the sectional view of FIG.
- the driving force receiving surface 65b of the engaging portion also has the same twist shape so as to come into contact with the main body driving transmission surface 101b, the driving force receiving surface 65b is inclined with respect to the rotation axis of the main body driving shaft 101. More specifically, the driving force receiving surface 65b is arranged on the upstream side in the rotation direction of the drum unit on the outer side in the axial direction of the drum unit than on the inner side. Therefore, the normal direction force F acting from the main body drive transmission surface 101b to the driving force receiving surface 65b has a force F3 as a component in the rotation axis direction. That is, a force F3 that biases the engaging member 65 and the coupling unit 28 outward in the longitudinal direction of the photosensitive drum is generated.
- the driving force is transmitted from the first guided surface 65 d of the engaging member 65 to the first guiding surface 72 d of the flange cap member 72.
- the first guide surface 72d is a transmitted portion to which a driving force is transmitted, and the flange cap member 72 is a transmitted member.
- the first guide surface 72d is also a backup unit that prevents the engaging unit 65a from moving downstream in the drum unit rotation direction when a driving force is applied to the engaging member 65.
- the first guided surface 65d is a transmission portion for transmitting a driving force to the flange cap member 72.
- the first guide surface 72d is inclined with respect to the driving force receiving surface 65b.
- the driving force F applied perpendicularly to the driving force receiving surface 65d has a component that goes radially inward along the first guide surface 72d.
- the engaging portion 65a is guided toward the radially inner side of the coupling unit 28 along the first guide surface 72d. That is, when the driving force F is transmitted, the first guide surface 72d urges the engaging portion 65a and the driving force receiving surface 65b toward the inner side in the radial direction (that is, the inner side of the driving transmission groove 101a). Facing in any direction.
- the flange cap member 72 has a position restricting groove 72 l (engagement portion, recess) for engaging with a protrusion provided on the flange member 71. Moreover, it has the fitting surface 72k fitted with the inner periphery of the flange member 71.
- FIG. A driving force is transmitted to the flange member 71 through the fitting surface 72k and the position restricting groove 72l. Since the flange member 71 is attached to the photosensitive drum 1, the driving force is finally transmitted from the flange member 71 to the photosensitive drum 1.
- the flange member 71 is provided with a convex portion
- the flange cap member 72 is provided with a concave portion (position restricting groove 72l) for engaging with the flange cap member 72.
- the configuration is not limited thereto.
- the driving force may be transmitted from the flange cap member 72 to the flange member 71 by providing the flange member 71 with a concave portion and providing the flange cap member 72 with a convex portion engaging therewith.
- the surface twisted on the driving force receiving surface 65b is configured so that the drum unit 30 is urged outward in the axial direction when the driving force F is applied to the driving force receiving surface 65b. did.
- the driving force receiving surface 65b does not necessarily have a twisted shape as long as it has a function equivalent to that of a twisted surface.
- the driving force receiving surface 65b may be a surface that is inclined with respect to the driving force F in the direction in which the urging force Fc2 is generated.
- the surface shape may be a flat surface or a curved surface, for example.
- the flange member 71 receives a radially outward force, which is a reaction force, against the radially inner biasing force received by the engaging member 65 from the biasing member 66.
- An abutting surface (urging member abutting portion) 71f that receives the urging member is provided.
- the contact surface 71f is a pressing force receiving portion (biasing force receiving portion) that is pressed and urged by the urging member. Moreover, it is a biasing member support part for supporting a biasing member.
- the contact surface 71 f of the flange member 71 is arranged at a position where at least a part of the contact surface 71 f overlaps a part of the photosensitive drum 1 in the longitudinal direction in the longitudinal direction of the photosensitive drum 1. Is done. That is, when the abutting surface 71f and the photosensitive drum 1 are projected perpendicularly to the axis of the photosensitive drum, at least a part of the projected areas overlap each other. In other words, at least a part of the contact surface 71 f is disposed inside the photosensitive drum 1. In particular, in the present embodiment, the entire contact surface 71 f is disposed inside the photosensitive drum 1. This is due to the following reason.
- the contact surface 71f of the flange member 71 is disposed in a thin portion of the flange member for the convenience of the space in the radial direction.
- the abutting surface 71f of the flange member 71 is received by receiving the urging force radially outward from the urging member 66 generated on the abutting surface 71f by the photosensitive drum 1 generally made of an aluminum alloy having higher strength than the flange member. Surrounding deformation can be suppressed.
- By suppressing the deformation of the flange member 71 it is possible to suppress the deformation to reach the bearing portion 71c formed on the flange member 71 for rotatably supporting the photosensitive drum 1, and the photosensitive drum 1 can be made accurate. It was possible to support it so that it could rotate well.
- At least a part of the urging member 66 is disposed inside the photosensitive drum 1 in order to dispose at least a part of the contact surface 71 f inside the photosensitive drum 1.
- the abutting portion (urging portion) of the urging member 66 that abuts against the abutting surface 71 f is disposed inside the photosensitive drum 1.
- the entire urging member 66 is disposed inside the photosensitive drum 1.
- the engaging member 65, the engaging portion 65a, and the driving force receiving surface 65b are also arranged inside the photosensitive drum 1. That is, particularly in the present embodiment, the entire engaging member 65 is disposed inside the photosensitive drum 1.
- the shaft portion 101 f in which the drive transmission groove 101 a is formed is also inside the photosensitive drum 1 when the cartridge 7 is attached to the apparatus main body. It will enter (see FIGS. 8 and 9). Since the drive transmission shaft 101 is supported at two locations of the bearing portion 101d and the shaft portion 101f, the longer the distance between the bearing portion 101d and the shaft portion 101f, the smaller the inclination of the drive transmission shaft 101 with respect to the drum unit. It is suitable for. If the shaft portion 101f is made to enter the inside of the photosensitive drum 1, it is easy to ensure the distance between the shaft receiving portion 101d and the shaft portion 101f while keeping the apparatus main body small. [Extraction of coupling unit from main unit drive shaft]
- the extraction taper surface 65l of the engaging portion 65a abuts against the main body side extraction taper 101i as shown in FIG.
- the urging member 66 starts to contract due to the extraction taper surface 65l abutting against the main body side extraction taper 101i, and the engaging member 65 is moved radially outward along the main body side extraction taper 101i.
- the coupling unit 28 when the coupling unit 28 is removed from the main body drive shaft 101, the state becomes the same as that shown in FIG. To do.
- the coupling unit 28 can be removed from the main body drive shaft 101 by the engagement portion 65a moving to the outer diameter of the shaft portion 101f.
- the engaging member 65 is positioned at the engaging member restricting portion 65j and the flange cap member restricting portion 72j. And the position is regulated in the urging direction.
- the coupling unit 28 can be removed from the main body drive shaft 101.
- the driving force receiving surface 65 b has a shape twisted around the rotation axis of the flange member 71.
- the twisting direction was arranged on the upstream side in the rotation direction of the photosensitive drum 1 with respect to the inner side (Z2 direction side) of the outer side (Z1 direction side) of the photosensitive drum unit 30 of the driving force receiving surface 65b.
- the driving force receiving surface 65b is arranged in a direction that hinders the removal operation. That is, as shown in FIG. 26, the outer side (Z1 direction side) of the driving force receiving surface 65b is arranged on the upstream side in the rotational direction with respect to the inner side (Z2 direction side). If it is going to be removed from the drive shaft 101, the removal load becomes larger than the insertion load.
- the main body drive shaft 101 may be reversely rotated until the rotation of the main body drive shaft 101 is stopped and the cartridge 7 is started to be removed from the image forming apparatus main body 100A.
- the cartridge 7 is removed from the image forming apparatus main body 100A after the state in which the driving force receiving surface 65b is in contact with the drive transmission surface 101b is released, so that the removal load can be reduced.
- the main body drive shaft 101 may be reversely rotated by a link mechanism or the like in conjunction with the opening operation of the cartridge door 104, or the motor of the drive source of the main body drive shaft 101 may be reversely rotated. good.
- the cartridge 7 can be attached and detached satisfactorily without using a mechanism for retracting the main body drive shaft 101 in the axial direction.
- the drive transmission by the ring unit 28 is enabled.
- the engaging portion 65 a formed on the engaging member 65 protrudes radially inward from the hole 72 a of the coupling unit 28.
- the driving force receiving surface 65b formed in the engaging portion extends inward in the radial direction.
- the driving force receiving surface 65b and the drive transmission surface 101b formed in the groove portion 101a come into contact with each other, so that drive transmission can be performed satisfactorily.
- the direction of the driving force F received in the normal direction by the driving force receiving surface 65 b is relative to the tangential direction of the virtual circle centering on the rotation axis of the photosensitive drum 1.
- the drum 1 is inclined toward the inner side in the radial direction.
- the direction of the driving force F is inclined with respect to the direction in which the engaging member 65 is guided so as to be movable, and the angle formed is an acute angle.
- the engaging member 65 is provided with a drive shaft contact surface 65c that contacts the outer peripheral surface of the shaft portion 101f of the main body drive shaft. As a result, the rotational moment M generated in the engagement member 65 is supported by the drive shaft abutment surface 65c, whereby the engagement member 65 can be supported more firmly and drive stability can be improved.
- the engaging portion 65a has an insertion taper surface 65k at one end on the outer side in the longitudinal direction of the photosensitive drum 1, and a removal taper surface 65l at the other end opposite to the one end having the insertion taper surface 65k. It was made to form. As a result, when the cartridge is attached / detached, the insertion taper surface 65k or the removal taper surface 65l is brought into contact with the groove portion 101a of the main body drive shaft so that the cartridge 7 can be attached / detached smoothly without being caught.
- the contact surface 71f with the urging member provided on the flange member 71 is arranged at a position overlapping the photosensitive drum 1 in the longitudinal direction. While the engaging member 65 receives a radially inner biasing force from the biasing member 66, the contact portion 71f receives a radially outer force that is a reaction force of the biasing force.
- the second embodiment will be described with reference to FIGS.
- the elements corresponding to those of the above-described embodiment are given the same names, and the description of the same points as the elements described above may be omitted. These will be described with a focus on differences from the elements described above.
- the coupling unit disclosed in the above embodiment is a member to which a driving force for rotating the photosensitive drum 1 is transmitted.
- the above-described coupling unit can be used to rotate members other than the photosensitive drum 1.
- the present embodiment discloses a coupling unit 4028 to which a driving force for rotating the developing roller and the toner supply roller is transmitted.
- each of the photosensitive drum 1, the developing roller 4017, and the toner supply roller 4020 is a rotating body configured to rotate with a developer (toner) carried on the surface thereof.
- FIG. 27 is a schematic cross-sectional view of the image forming apparatus 4100A of the present embodiment.
- the image forming apparatus 4100A includes a first image forming unit for forming images of yellow (Y), magenta (M), cyan (C), and black (K) as a plurality of image forming units. It has second, third, and fourth image forming units SY, SM, SC, and SK. In the present embodiment, the first to fourth image forming units SY, SM, SC, and SK are arranged in a line in a substantially horizontal direction.
- each drum cartridge 4013 (4013Y, 4013M, 4013C, 4013K) are substantially the same except that the color of the image to be formed is different.
- the configuration and operation of each developing cartridge 4004 (4004Y, 4004M, 4004C, 4004K) are substantially the same except that the color of the image to be formed is different. Therefore, in the following, the drum cartridge 4013 and the developing cartridge 4004 will be described in a comprehensive manner, omitting Y, M, C, and K unless particularly distinguished.
- the image forming apparatus 4100A includes a cylinder (hereinafter referred to as a photosensitive drum) 1 having four photosensitive layers arranged in parallel in a direction slightly inclined with respect to the vertical direction as a plurality of image carriers. .
- a scanner unit (exposure device) 3 is disposed below the drum cartridge 4013 and the developing cartridge 4004 in the direction of gravity. Further, around the photosensitive drum 1, a charging roller 2 as a process means (process device, process member) acting on the photosensitive layer is disposed.
- the charging roller 2 is a charging means (charging device, charging member) that uniformly charges the surface of the photosensitive drum 1.
- the scanner unit (exposure device) 3 is exposure means (exposure device, exposure member) that forms an electrostatic image (electrostatic latent image) on the photosensitive drum 1 by irradiating a laser based on image information.
- a cleaning blade 6 and a developing cartridge 4004 are disposed as cleaning means (cleaning device, cleaning member).
- an intermediate transfer belt 5 as an intermediate transfer body for transferring a toner image on the photosensitive drum 1 to a recording material (sheet, recording medium) 12 is disposed opposite to the four photosensitive drums 1. Yes.
- the developing cartridge 4004 of this embodiment uses a non-magnetic one-component developer (hereinafter referred to as toner) as a developer, and a contact developing method in which a developing roller 4017 as a developer carrying member is brought into contact with the photosensitive drum 1. Adopted.
- toner non-magnetic one-component developer
- the drum cartridge 4013 includes a charging roller 2 that charges the photosensitive drum 1, a cleaning blade 6 that cleans toner remaining without being transferred onto the photosensitive drum 1, and Is provided. Untransferred toner remaining on the photosensitive drum 1 without being transferred onto the sheet 12 is collected by the cleaning blade 6. Further, the transfer residual toner collected by the cleaning blade 6 is accommodated in a removed developer accommodating portion (hereinafter referred to as a waste toner accommodating portion) 4014a through the opening 4014b.
- the waste toner container 4014a and the cleaning blade 6 are integrated to form a drum cartridge (photosensitive unit, drum unit, image carrier unit) 4013.
- the image forming apparatus 4100A includes a guide (positioning means) such as a mounting guide and a positioning member (not shown) in the main body frame.
- the developing cartridge 4004 and the drum cartridge 4013 are guided by the above-described guide, and are configured to be detachable from the image forming apparatus main body 4100A.
- Each color developer cartridge 4004 contains toner of each color of yellow (Y), magenta (M), cyan (C), and black (K).
- the intermediate transfer belt 5 abuts on the photosensitive drum 1 included in each drum cartridge 4013 and rotates (moves) in the direction of arrow B in FIG.
- the intermediate transfer belt 5 is stretched around a plurality of support members (a driving roller 51, a secondary transfer counter roller 52, and a driven roller 53).
- a driving roller 51, a secondary transfer counter roller 52, and a driven roller 53 On the inner peripheral surface side of the intermediate transfer belt 5, four primary transfer rollers 8 as primary transfer means are arranged in parallel so as to face the respective photosensitive drums 1.
- a secondary transfer roller 9 as a secondary transfer unit is disposed at a position facing the secondary transfer counter roller 52 on the outer peripheral surface side of the intermediate transfer belt 5.
- the surface of the photosensitive drum 1 is uniformly charged by the charging roller 2.
- the surface of the charged photosensitive drum 1 is scanned and exposed by laser light corresponding to image information emitted from the scanner unit 3.
- an electrostatic latent image corresponding to the image information is formed on the photosensitive drum 1.
- the electrostatic latent image formed on the photosensitive drum 1 is developed as a toner image by the developing cartridge 4004.
- the toner image formed on the photosensitive drum 1 is transferred (primary transfer) onto the intermediate transfer belt 5 by the action of the primary transfer roller 8.
- the above-described process is sequentially performed in four drum cartridges 4013 (4013Y, 4013M, 4013C, and 4013K) and a developing cartridge 4004 (4004Y, 4004M, 4004C, and 4004K). Then, the respective color toner images formed on the photosensitive drums 1 of the respective drum cartridges 4013 are sequentially primary-transferred so as to be superimposed on the intermediate transfer belt 5. Thereafter, the recording material 12 is conveyed to the secondary transfer portion in synchronization with the movement of the intermediate transfer belt 5. Then, the four-color toner images on the intermediate transfer belt 5 are collectively transferred onto the recording material 12 conveyed to the secondary transfer portion formed by the intermediate transfer belt 5 and the secondary transfer roller 9.
- the recording material 12 onto which the toner image has been transferred is conveyed to a fixing device 10 as fixing means.
- the toner image is fixed on the recording material 12 by applying heat and pressure to the recording material 12 in the fixing device 10.
- the primary transfer residual toner remaining on the photosensitive drum 1 after the primary transfer process is removed by the cleaning blade 6 and collected as waste toner. Further, the secondary transfer residual toner remaining on the intermediate transfer belt 5 after the secondary transfer step is removed by the intermediate transfer belt cleaning device 11.
- the image forming apparatus 4100A can also form a single-color or multi-color image by using a desired single or several (not all) image forming units. [Outline of process cartridge]
- FIGS. An outline of the drum cartridge 4013 (4013Y, 4013M, 4013C, 4013K) and the developing cartridge 4004 (4004Y, 4004M, 4004C, 4004K) mounted on the image forming apparatus main body 4100A of this embodiment is shown in FIGS. This will be described with reference to FIGS.
- the drum cartridge 4013Y, the drum cartridge 4013M, the drum cartridge 4013C, and the drum cartridge 4013K have the same configuration.
- the developing cartridge 4004Y that stores yellow toner, the developing cartridge 4004M that stores magenta toner, the developing cartridge 4004C that stores cyan toner, and the developing cartridge 4004K that stores black toner have the same configuration.
- the drum cartridges 4013Y, 4013M, 4013C, and 4013K are collectively referred to as the drum cartridge 4013
- the developing cartridges 4004Y, 4004M, 4004C, and 4004K are collectively referred to as the developing cartridge 4004.
- each cartridge constituent member will be described generically.
- FIG. 28 is an external perspective view of the drum cartridge 4013.
- the rotation axis direction of the photosensitive drum 1 is the Z direction (arrow Z1, arrow Z2)
- the horizontal direction in FIG. 27 is the X direction (arrow X1, arrow X2)
- the vertical direction in FIG. Is the Y direction (arrow Y1, arrow Y2).
- Drum unit bearing members 4039R and 4039L are attached to both sides of the cleaning frame 4014, and support the photosensitive drum unit 4030, respectively. As a result, the photosensitive drum unit 4030 is rotatably supported by the cleaning frame body 4014.
- the charging roller 2 and the cleaning blade 6 are attached to the cleaning frame 4014, and these are arranged so as to come into contact with the surface of the photosensitive drum 1.
- the charging roller bearing 15 is attached to the cleaning frame body 4014.
- the charging roller bearing 15 is a bearing for supporting the shaft of the charging roller 2.
- the charging roller bearing 15 (15R, 15L) is attached to be movable in the direction of arrow C shown in FIG.
- the rotating shaft 2a of the charging roller 2 is rotatably attached to the charging roller bearing 15 (15R, 15L).
- the charging roller bearing 15 is urged toward the photosensitive drum 1 by a pressure spring 16 as urging means. As a result, the charging roller 2 comes into contact with the photosensitive drum 1 and rotates following the photosensitive drum 1.
- the cleaning frame 4014 is provided with a cleaning blade 6 as a cleaning means for removing toner remaining on the surface of the photosensitive drum 1.
- the cleaning blade 6 is formed by integrating a blade-like rubber (elastic member) 6a that contacts the photosensitive drum 1 and removes toner on the photosensitive drum 1, and a support metal plate 6b that supports the rubber.
- the support metal plate 6b is fixed and attached to the cleaning frame body 4014 with screws.
- the cleaning frame 4014 has the opening 4014b for collecting the transfer residual toner collected by the cleaning blade 6.
- the opening 4014b is provided with a blowout prevention sheet 26 that contacts the photosensitive drum 1 and seals between the photosensitive drum 1 and the opening 4014b, and prevents toner leakage in the upper direction of the opening 4014b.
- FIG. 30 is an external perspective view of the developing cartridge 4004.
- the developing cartridge 4004 has a developing frame 4018 that supports various elements.
- the developing cartridge 4004 is provided with a developing roller 4017 as a developer carrying member that rotates in the direction of arrow D (counterclockwise) shown in FIG.
- the developing roller 4017 is rotatably supported by the developing frame body 4018 via developing bearings 4019 (4019R, 4019L) at both ends in the longitudinal direction (rotation axis direction).
- the developing bearings 4019 (4019R, 4019L) are respectively attached to both sides of the developing device frame 4018.
- the developing cartridge 4004 has a developer storage chamber (hereinafter, toner storage chamber) 4018a and a development chamber 4018b in which a developing roller 4017 is disposed.
- toner storage chamber hereinafter, toner storage chamber
- development chamber 4018b in which a developing roller 4017 is disposed.
- a toner supply roller 4020 as a developer supply member that contacts the developing roller 4017 and rotates in the direction of arrow E
- a developing blade 21 as a developer regulating member for regulating the toner layer of the developing roller 4017 are provided. Is arranged.
- the developing blade 21 is fixed and integrated with the fixing member 22 by welding or the like.
- the toner storage chamber 4018a of the developing device frame 4018 is provided with a stirring member 23 for stirring the stored toner and conveying the toner to the toner supply roller 4020.
- FIG. 32 is an external view of the main body drive shaft 4101.
- FIG. 33 is a cross-sectional view taken along the rotation axis (rotation axis) of the main body drive shaft 4101 in a state of being attached to the image forming apparatus main body.
- the main body drive shaft 4101 includes a gear member 4101e, an intermediate body 4101p, an output member 4101q, and a drive transmission member 4101r.
- the image forming apparatus main body 4100A is provided with a motor (not shown) as a drive source.
- the gear member 4101e obtains rotational drive from this motor, and the drive is transmitted in the order of the intermediate body 4101p, the output member 4101q, and the drive transmission member 4101r, and the main body drive shaft 4101 rotates.
- the gear member 4101e, the intermediate body 4101p, and the output member 4101q have an Oldham coupling mechanism, and can move a certain distance in the X direction and the Y direction. Therefore, the drive transmission member 4101r provided on the cartridge side of the main body drive shaft 4101 via the Oldham coupling can also move a certain distance in the X direction and the Y direction.
- the drive transmission member 4101r includes a rotatable shaft portion 4101f, and the rotational driving force received from the motor is transmitted through a groove-shaped drive transmission groove 4101a (concave portion, drive transfer portion) provided in the shaft portion 4101f. It is transmitted to the developing cartridge 4004 side. Further, the shaft portion 4101f has a conical shape 4101c at the tip thereof.
- the main body drive transmission groove 4101a has a shape into which an engagement portion 4065a described later can enter.
- a main body drive transmission surface 4101b is provided as a surface that contacts the driving force receiving surface (driving force receiving portion) 4065b of the coupling unit 4028 and transmits the driving force.
- the main body drive transmission surface 4101b is not a flat surface but has a shape twisted about the center of the rotation axis of the main body drive shaft 4101.
- the twist direction is a direction in which the Z1 direction side of the main body drive shaft 4101 is arranged on the upstream side in the rotation direction of the main body drive shaft 4101 with respect to the Z2 direction side.
- the amount of twist along the rotation axis direction of the cylinder of the engaging portion 4065a is about 1 ° per mm. The reason why the main body drive transmission surface 4101b has a twisted shape will be described later.
- a main body side removal taper 4101i is provided on the surface on the Z2 direction side of the main body drive transmission groove 4101a.
- the main body-side extraction taper 4101i is a taper (inclined surface, inclined portion) for assisting the engagement portion 4065b to come out of the drive transmission groove 4101a when the developing cartridge 4004 is removed from the apparatus main body 4100A.
- the supported portion 4101d provided on the gear member 4101e is rotatably supported (supported) by a bearing member 4102 provided on the image forming apparatus main body 4100A.
- the output member 4101q is rotatably supported by the coupling holder 4101s.
- the drive transmission member 4101r is supported by the output member 4101q so as to be movable in the Z direction, and is urged toward the developing cartridge 4004 (in the Z2 direction) by the spring member 4103.
- the movable amount (backlash) of the drive transmission member 4101q in the Z direction is about 1 mm, which is sufficiently smaller than the width of the driving force receiving surface 4065a described later in the Z direction.
- the coupling holder 4101s is urged in a substantially Y2 direction by an urging spring 4101t. Therefore, as will be described later, when the developing cartridge 4004 is mounted, the drive transmission member 4101r is in a position substantially shifted in the Y2 direction with respect to the axis of the gear member 4101e.
- the drive transmission member 4101r is provided with the main body drive transmission groove 4101a
- the coupling unit 4028 is provided with the engaging portion (protrusion portion, protruding portion) 4065a to transmit the drive from the apparatus main body 4100A to the developing cartridge 4004. It is as.
- the developing roller and the supply roller rotate at k when the driving force is transmitted to the coupling unit 4028.
- the engaging portion 4065a is formed on an engaging member (sliding member, moving member, driving force receiving member) 4065 that is movable while being urged by the urging member. Therefore, the engaging portion 4065a is configured to be movable at least outward in the radial direction when the developing cartridge 4004 is attached to the apparatus main body 4100A.
- the engaging portion 4065a enters the drive transmission groove 4101a, and the engaging portion 4065a and the body drive transmission groove 4101a can be engaged.
- FIG. 34 is a perspective view in which the coupling unit 4028 is attached to the toner supply roller 4020.
- FIG. 35 is a perspective view of the engagement member 4065
- FIG. 35 (a) is a perspective view seen from the upper left
- FIG. 35 (b) is a perspective view seen from the upper right.
- FIG. 36 is a perspective view of members constituting the coupling unit 4028.
- FIG. 37 is a perspective view of the coupling unit 4028 and the toner supply roller 4020.
- FIG. 39 is a cross-sectional view of the developing cartridge 4004.
- the coupling unit 4028 of the present embodiment is similar to the coupling unit 28 of the first embodiment except that the driving member is the toner supply roller 4020, but the other components are similar.
- the coupling unit 4028 is provided with three engaging portions 4065a that engage with the drive transmission member 4101r. As shown in FIG. 38, the engaging portion 4065a is fitted into the groove portion 4101a of the drive transmission member 4101r to transmit the drive.
- the configuration of the coupling unit (coupling member) 4028 will be specifically described below.
- the coupling unit 4028 includes a coupling cover member 4071, a coupling holder member 4072, an engaging member 4065, and an urging member 4066 as shown in the perspective view of FIG. 36 and the cross-sectional view of FIG.
- the coupling cover member 4071 is a cylindrical member having a hollow portion, and the coupling holder 4072 is disposed in the internal space of the coupling cover member 4071.
- the coupling holder 4072 is a holding member that holds the engaging member 4065 so as to be slidable. As shown in FIG. 38, the engaging member 4065 having the engaging portion 4065a is supported in a state of being urged by the urging member 4066 toward the inside in the radial direction of the coupling unit 4028 in the coupling unit 4028.
- the engaging member 4065 has a first guided surface 4065d and a second guided surface 4065e so as to be guided so as to be movable in the radial direction within the coupling unit. Moreover, it has the 3rd guided surface 4065f and the 4th guide surface 4065g for position-controlling the engaging member 4065 to an axial direction.
- the first to fourth guided surfaces (4065d, 4065e, 4065f, 4065g) are guided portions guided by the coupling holder 4072, and their positions are regulated by the coupling holder 4072. It is also a controlled position part (controlled part).
- the coupling holder 4072 has first to fourth guide surfaces corresponding to the first to fourth guided surfaces.
- the engaging member 4065 has a contact surface (biased portion, pressed portion) 4065h for receiving the biasing force by the biasing member 4066. Further, the engaging member 4065 abuts on the coupling holder member 4072 by the urging force of the urging member 66 to restrict the position of the engaging member 4065, and the attachment formed on the position restricting protrusion 4065i. It has a force position restricting surface 4065j. Similar to the first embodiment, the urging force position restricting surface 4065j is a locked portion that is restricted and locked by the coupling holder member 4072 to move inward in the radial direction.
- the engaging member 4065 has an insertion tapered surface 4065k.
- the coupling holder member 4072 has a coupling hole 4072a for allowing the drive transmission member 4101r to pass therethrough and an attachment hole 4072b for supporting the engagement member 4065 so as to be movable in the radial direction.
- the coupling cover member 4071 has a cylindrical shape and is attached to the outer peripheral surface 4072k of the coupling holder member 4072.
- the urging member 4066 is an elastic member (compression coil spring) that can be elastically expanded and contracted, and exerts a reaction force in the direction in which the compression spring is extended against the external force in the direction in which the compression spring is contracted.
- the engaging member 4065 is biased toward at least the inner side (radially inner side) of the coupling unit 4028 by the biasing member 4066.
- the urging member 4066 Since the urging member 4066 is compressed while being sandwiched between the contact surface 4065h of the engaging member 4065 and the inner peripheral surface of the coupling cover member 4071, the urging member 4066 exerts an urging force in the extending direction. The engaging member 65 is urged.
- the engaging member 4065 is supported by the coupling holder member 4072 in a state where the engaging portion 4065a of the engaging member 4065 is exposed from the hole 4072a of the coupling holder member 4072. Similarly, the drive shaft abutting surface 4065c formed in an arc shape on the engaging member 4065 is exposed from the hole 4072a of the coupling holder member 4072.
- the engaging portion 4065a of the engaging member 4065 protrudes radially inward from the inner peripheral surface of the hole 4072a of the coupling holder member 4072.
- the amount of protrusion is such that the engaging portion 4065a surely enters the groove 4101a of the drive shaft.
- the amount of protrusion is such that the driving force receiving surface 4065b formed on the engaging portion 4065a has a strength corresponding to the load torque of the toner supply roller 4020 that is a rotated member. It is only necessary that the engaging portion 4065a can stably transmit the driving force from the main body driving shaft 4101 by setting such a protruding amount.
- the protruding amount of the engaging portion 4065a is preferably 1 mm to 3 mm. That is, when the distance from the inner surface of the coupling holder member 4072 to the tip of the engaging portion 4065a is measured along the radial direction of the coupling member, the distance is 1 mm to 3 mm.
- the drive shaft abutting surface 4065c of the engaging member 4065 protrudes radially inward from the inner peripheral surface of the hole 4072a of the flange cap member 4072.
- the protrusion amount is preferably from 0.3 mm so that the drive shaft abutting surface 4065c reliably protrudes from the inner peripheral surface of the hole 4072a even when the size of each part varies. 1 mm.
- the coupling holder member 4072 is formed with a hole portion 4072h through which the shaft portion (shaft) 4020a of the toner supply roller 4020 passes.
- the toner supply roller 4020 and the coupling unit 4028 rotate integrally with each other by the anti-rotation shape formed in the hole portion 4072h and the shaft portion 4020a. That is, in this embodiment, unlike the first embodiment, the coupling unit 4028 is fixed to the shaft (shaft portion 4020a) of the rotating body (toner supply roller).
- the coupling unit 4028 is arranged coaxially with the toner supply roller 4020.
- the distance from the axis (center) of the coupling unit 4028 to the driving force receiving portion (driving force receiving surface 4065b) is longer than the radius of the shaft portion 4020a. In this way, the force applied to the driving force receiving surface 4065b can be reduced with respect to the load torque necessary to rotate the shaft portion 4020a of the toner supply roller 4020.
- the toner supply roller 4020 has a gear 4098 on the opposite side (non-driving side) from the driving side to which the coupling unit 4028 is attached. This gear meshes with a gear 4099 attached to the shaft of the developing roller 4017.
- FIG. 40 is a perspective view for explaining mounting of the developing cartridge 4004 to the image forming apparatus main body 4100A.
- 41, 42, and 43 are cross-sectional views for explaining the mounting operation of the developing cartridge 4004 to the image forming apparatus main body 4100A.
- the image forming apparatus main body 4100A of the present embodiment employs a configuration in which the developing cartridge 4004 and the drum cartridge 4013 can be mounted in the horizontal direction.
- the image forming apparatus main body 4100A includes a space in which the developing cartridge 4004 and the drum cartridge 4013 can be mounted.
- the image forming apparatus main body 4100A has a cartridge door 4104 (front door) for inserting the developing cartridge 4004 and the drum cartridge 4013 into the space described above (the direction in which the user stands when using the image forming apparatus main body 4100A).
- the cartridge door 4104 of the image forming apparatus main body 4100A is provided to be openable and closable.
- the cartridge lower guide rail 4105 for guiding the developing cartridge 4004 is disposed on the bottom surface of the space, and the cartridge upper guide rail 4106 is disposed on the upper surface.
- the developing cartridge 4004 is guided to the mounting position by upper and lower guide rails (4105, 4106) provided above and below the space.
- the developing cartridge 4004 is inserted into the mounting position substantially along the axis of the developing roller 4020.
- FIG. 41 the attaching / detaching operation of the developing cartridge 4004 to the image forming apparatus main body 4100A will be described with reference to FIGS. 41, 42, and 43.
- FIG. 41 the attaching / detaching operation of the developing cartridge 4004 to the image forming apparatus main body 4100A will be described with reference to FIGS. 41, 42, and 43.
- the developing cartridge 4004 is supported and guided by the cartridge lower guide rail 4105 at the back end on the back side in the insertion direction, and the cartridge upper guide rail 4016 (not shown) at the top end on the back side in the insertion direction. Inserted in a guided state. At this time, the development frame body 4018 and the development bearing 4019 are in a dimensional relationship such that the intermediate transfer belt 5 does not contact.
- the developing cartridge 4004 is inserted in the horizontal direction while being supported by the cartridge lower guide rail 4105, and is inserted until it abuts against the back side cartridge positioning portion 4108 provided in the image forming apparatus main body 4100A. Is done.
- the drive transmission member 4101r of the image forming apparatus main body 4100A is engaged with the coupling unit 4028 while being biased substantially in the Y2 direction.
- FIG. 43 is a view showing a state of the image forming apparatus main body 4100A and the developing cartridge 4004 with the cartridge door 4104 closed.
- the cartridge lower guide rail 4105 of the image forming apparatus main body 4100A is configured to move up and down in conjunction with opening and closing of the cartridge door (front door) 4104.
- the cartridge lower guide rail 4105 is raised. Then, both end portions of the developing cartridge 4004 abut on the cartridge positioning portions (4108 and 4110) of the image forming apparatus main body 4100A, and the developing cartridge 4004 is positioned with respect to the image forming apparatus main body 4100A. Further, the drive transmission member 4101r of the image forming apparatus main body 4100A also rises following the developing cartridge 4004.
- FIG. 44, 45, 46, and 47 an engagement process between the coupling unit 4028 and the main body drive shaft 4101 will be described in detail with reference to FIGS. 44, 45, 46, and 47.
- FIG. 44, 45, 46, and 47 are cross-sectional views for explaining the mounting operation of the coupling unit 4028 to the main body drive shaft 4101.
- FIG. 44, 45, 46, and 47 are cross-sectional views for explaining the mounting operation of the coupling unit 4028 to the main body drive shaft 4101.
- FIG. 44 is a diagram showing a state in which the coupling unit 4028 starts to engage with the drive transmission member 4101r.
- FIG. 47 shows a state in which the developing cartridge 4004 is mounted on the image forming apparatus main body 4100A. In particular, FIG. 47 shows a state where the cartridge lower guide rail 4105 is raised as the cartridge door 4104 is closed, and the developing cartridge 4004 is positioned with respect to the image forming apparatus main body 4100A.
- 45 and 46 are diagrams for explaining the mounting process of the coupling unit 4028 and the drive transmission member 4101r between FIG. 44 and FIG.
- the drive transmission member 4101r is urged in the substantially Y2 direction by the urging spring 4101t, and the axis of the drive transmission member 4101r is urged to a position shifted in the approximately Y2 direction from the axis of the coupling unit 4028.
- the developing cartridge 4004 is inserted in the horizontal direction while being supported by the cartridge lower guide rail 4105 of the image forming apparatus main body 4100A.
- FIG 44 is a view showing a state before the drive transmission member 4101r is engaged with the coupling unit 4028.
- FIG. As described above, in this state, the axis of the drive transmission member 4101r and the axis of the coupling unit 4028 are misaligned. Therefore, first, the tapered surface 4072p formed at the entrance of the hole 4072a of the coupling holder member 4072 of the coupling unit 4028 contacts the conical shape 4101c of the drive transmission member 4101r.
- the coupling unit 4028 is further inserted from FIG. 44 toward the back side of the drive transmission member 4101r. Then, the conical shape 4101c of the drive transmission member 4101r is guided by the insertion taper surface 4065k of the engagement member 4065, and the axis of the coupling unit 4028 and the axis of the drive transmission member 4101r become substantially the same.
- the coupling unit 4028 is further inserted toward the back side of the drive transmission member 4101r from FIG. Then, the coupling unit 4028 is inserted into the drive transmission member 4101r until the extraction taper surface 40651 of the engagement member 4065 comes to the back side in the Z direction from the main body side extraction taper 4101i of the drive transmission member 4101r.
- a coupling unit 4028 is inserted into the drive transmission member 4101r. Then, the conical recess 4072m which is a positioning portion formed on the coupling holder member 4072 of the coupling unit 4028 and the conical shape 4101c of the drive transmission member 4101r abut.
- the developing cartridge 4004 is lifted by the cartridge lower guide rail 4105, whereby the developing cartridge 4004 is positioned with respect to the image forming apparatus main body 4100A (shown in FIG. 43).
- the drive transmission member 4101r also rises as the developing cartridge 4004 rises.
- the main body drive transmission groove 4101a and the engaging portion 4065a become engageable. Therefore, it is not necessary to move the main body drive shaft 4101 to engage with the coupling unit 4028. That is, it is not necessary to provide a mechanism for moving the main body drive shaft 4101 so as to engage with the coupling unit 4028 in the apparatus main body 4100A of the image forming apparatus.
- the engaging member 4065 of the coupling unit 4028 is retracted radially outward by contacting the main body drive shaft 4101.
- the engaging member 4065 is configured to engage with the groove (main body drive transmission groove 4101a) of the main body drive shaft 4101 by moving inward in the radial direction.
- the image forming apparatus main body 4100A is required to have higher durability than the developing cartridge 4004.
- the engaging member 4065 provided in the coupling unit 4028 of the present embodiment had a configuration substantially equivalent to that provided in the coupling unit 28 described in the first embodiment.
- the coupling unit 4028 of the present embodiment is a part of the configuration changed to apply the coupling unit 28 described in the first embodiment to the developing cartridge (developing device) 4004. Therefore, the coupling unit 4028 in the present embodiment also has the same functions and effects according to the present invention as the coupling unit 28 described in the first embodiment.
- the configuration of the coupling unit shown in the present embodiment may be used as a coupling unit for rotating the photosensitive drum 1.
- FIG. 48 A third embodiment will be described with reference to FIGS. 48 to 50.
- FIG. in this embodiment the shape of the engaging portion of the engaging member is different from the above-described embodiment. The description will focus on the shape of the engaging portion.
- the coupling unit provided in the drum cartridge will be described as an example in the same manner as in the first embodiment.
- the present invention can also be used in a coupling unit provided in the developing cartridge.
- FIG. 48 (a) and 48 (b) are perspective views of the engaging member 5065 in the present embodiment, and FIG. 48 (c) is a front view.
- FIG. 49 is a sectional view of the coupling unit.
- FIG. 49 is a diagram showing a state in which a driving force is generated from the main body drive shaft 101 to the coupling unit 5028, and is a partially enlarged cross-sectional view of the coupling unit 5028. More specifically, FIG. 49 is a cross-sectional view perpendicular to the axis of the coupling unit 5028 (the axis of the drum unit).
- the engaging member 5065 is provided with an engaging portion 5065a that protrudes inward in the radial direction of the photosensitive drum 1.
- the distal end side of the engaging portion 5065a is rounded and bulges (projects) toward the upstream side in the rotation direction of the drum unit.
- the engaging portion 5065a includes a convex portion (bulge portion) 5065m having a semicircular shape protruding in the circumferential direction toward the side on which the drive shaft contact surface 5065c is formed, and a convex portion 5065m.
- a recess 5065n is formed at the base of the engaging portion 5065a. That is, the convex portion 5065m is a portion that protrudes (swells) toward the upstream side in the rotation direction of the drum unit with respect to the concave portion 5065n.
- the concave portion 5065n is a portion that is recessed toward the downstream side in the rotation direction with respect to the convex portion 5065m.
- FIG. 49 shows a state where the driving force F is generated from the drive transmission surface 101b of the main body drive shaft 101 in the engaging portion 5065a having such a shape. Since the recess 5065n is formed at the base of the engagement portion 5065a protruding from the engagement member 5065, the inlet-side corner portion 101j on the drive transmission surface 101b side is formed in the recess 5065n at this portion by the groove 101a of the main body drive shaft 101. It is possible to get in. As a result, the engaging portion 5065a receives the driving force F acting in the normal direction of the drive transmission surface 101b and can be transmitted.
- the driving force receiving portion 5065r for receiving the driving force from the driving transmission surface 101b faces at least the radially outer side of the coupling unit. Therefore, the driving force F received by the driving force receiving portion 5065r from the drive transmission surface 101b works toward the inner side in the radial direction of the coupling unit.
- the engaging portion 5065a and the driving force receiving portion 5065r are urged at least toward the inside in the radial direction (that is, the back side of the drive transmission groove 101a).
- the engaging portion 5065a and the driving force receiving portion 5065r can be stably engaged with the drive transmission groove 101a.
- the shape of the engaging portion 5065a will be described in more detail. As shown in FIG. 49, when a tangent line T parallel to the moving direction S of the engaging member 5065 is drawn with respect to the convex portion 5065m, the tangent line T and the convex portion 5065m have a vertex 5065p as a contact point. The vertex 5065p is disposed so as to protrude from the base 5065q of the engaging portion 5065a to a position separated by a distance L3 along the moving direction S of the engaging member 5065.
- a recess 5065n that is recessed with respect to the tangent line T is formed between the vertex 5065p and the root 5065q.
- the engagement portion 5065a receives the drive force F at the contact portion (drive force receiving portion 5065r) with the drive transmission surface 101b disposed in the recess 5065n. It is possible.
- the surface provided with the driving force receiving portion 5065r (the curved surface between the vertex 5065p and the root 5065q) is inclined with respect to the moving direction of the engaging member 5065 and faces at least the outer side in the radial direction of the coupling unit. ing. That is, the normal vector of the driving force receiving portion 5065r (the vector extending perpendicularly to the driving force receiving portion 5065r in the direction facing the driving force receiving portion 5065r) has a radially outward component. As shown in FIGS. 49A and 49B, the driving force F is a force that works perpendicularly to the drive transmission surface 101b and the driving force receiving portion 5065r. Therefore, the driving force F has a component directed inward in the radial direction.
- the driving force F is a force acting in a direction inclined by an angle ⁇ with respect to the moving direction S of the engaging member 5065. Therefore, as shown in FIG. 49B, the driving force F has a force FS as a component in the moving direction S of the engaging member.
- This force FS prevents the engagement member 5065 from moving in the direction opposite to the moving direction S, so that the drive force receiving portion 5065r of the engagement member is detached from the drive transmission surface 101b of the main body drive shaft and falls off. Can be prevented.
- a circular shape is given as an example of the shape of the convex portion (bulging portion) 5065m. What is necessary is just to be formed so that it may arise. That is, with respect to the tangent line T, there is a vertex 5065p as a contact at a position protruding from the root 5065q of the engaging portion, and a recess 5065n that is recessed with respect to the tangent line T is formed between the vertex 5065p and the root 5065q. Just do it.
- the cross-sectional shape of the convex portion (bulge portion) 5065m may be a bulge for engaging with the drive transmission groove 101a.
- a substantially circular polygon such as a pentagon
- the cross-sectional shape may be an ellipse. Such an example will be described with reference to FIG. 55 of the fourth embodiment.
- the contact portion (driving force receiving portion) 5065r for contacting the drive transmission surface 101b is arranged between the vertex 5065p and the root 5065q of the convex portion (bulge portion) 5065m. desirable.
- At least the engagement member 5065 can move more than the distance from the center to the surface in the cross section of the convex portion 5065m. It is desirable. That is, it is desirable that the engaging member 5065 be movable beyond the radius of the cross-sectional shape of the convex portion 5065m. More preferably, it is desirable that the width of the convex portion 5065m or more (that is, the diameter or more) is movable with a margin.
- the convex portion 5065m comes into contact with the drive transmission groove 101a on the tip side of the convex portion 5065m with respect to the vertex 5065p.
- a force in a direction away from the driving transmission groove 101a may be applied to the engaging member 5065. Therefore, in order to ensure the engagement state between the engagement member 5065 and the drive transmission groove 101a, the urging force of the urging member that urges the engagement member 5065 is increased, or the protrusion 5065m and the drive transmission groove 101a are It is desirable to increase the friction force generated between them. By taking these measures, the engagement member 6065 is less likely to retract from the drive transmission groove 101a.
- the entire engaging portion 6065a may be a bulging portion formed in a substantially circular shape. By being formed in such a simple shape, the dimensional accuracy of the engaging portion 6065a can be easily managed.
- the engaging portion 6065a also has a vertex 6065p as a contact point with a tangent line T parallel to the moving direction S of the engaging member 6065. Further, the vertex 6065p is disposed so as to protrude from the base 6065q of the engaging portion at a distance L4 along the moving direction S. A recess 6065n that is recessed with respect to the tangent line T is provided between the vertex 6065p and the root 6065q of the engaging portion. A contact portion (driving force receiving portion 6065r) for contacting the drive transmission surface 101b is also disposed between the vertex 6065p and the root 6065q of the engaging portion.
- the contact portion (driving force receiving portion) 6065r faces the driving force F in such a direction as to generate a force FS as a component generated in the direction opposite to the moving direction S of the engaging member. As a result, it is possible to prevent the engaging member 6065 from coming off from the drive transmission surface 101b of the main body drive shaft and falling off.
- the surface provided with the contact portion (driving force receiving portion) 6065r (the curved surface between the apex 6065p and the root 6065q of the engaging portion) is inclined with respect to the moving direction S of the engaging member 6065. More specifically, the tangent line of the driving force receiving portion 6065r is inclined with respect to the moving direction S.
- the driving force receiving portion 6065r faces the outside in at least the radial direction of the coupling unit. That is, the normal vector of the driving force receiving portion 6065r facing the side where the driving force receiving portion 6065r faces has at least a component facing outward in the radial direction of the coupling unit.
- the shape of the cross section of the engaging portion (bulging portion) projection 6065a does not need to be rounded, but may be a bulging shape for engaging with the drive transmission groove 101a.
- a substantially circular polygon such as a pentagon
- the cross-sectional shape may be an ellipse.
- the amount of movement of the engaging member 6065 satisfies the following. That is, it is desirable that the engaging member 6065 be movable beyond the distance from the center to the surface in the cross section of the engaging portion 6065a. That is, it is desirable that the engagement member 6065 (engagement portion 6065a) is movable beyond the radius of the cross-sectional shape of the engagement portion 6065a.
- the engaging portion 6065a is movable so as to be equal to or larger than the width (that is, the diameter) of the cross-sectional shape of the engaging member engaging portion 6065a.
- the fourth embodiment will be described with reference to FIGS.
- a configuration in which the configurations corresponding to the engaging member and the biasing member are integrated with resin will be described.
- the coupling unit provided in the drum cartridge will be described as an example in the same manner as in the first and third embodiments.
- the present embodiment can also be used in a coupling unit provided in the developing cartridge. .
- FIG. 52 (a) and 52 (b) are cross-sectional views of the drum unit.
- FIG. 52A shows a state where the engaging portion 565a is engaged with the drive transmission groove 101a and receives a driving force.
- FIG. 52B shows a state before the engaging portion 565a and the drive transmission groove 101a are engaged.
- a flange member 571 is attached to the inside of the photosensitive drum 1.
- This flange member 571 is a coupling unit (coupling member) in the present embodiment.
- a support portion 565 for supporting the driving force receiving portion 565r so as to be movable is formed integrally with the flange member 571.
- Three support portions 565 are provided on the flange member 571.
- Each of these support portions 565 includes an extension portion 565t, a bulge portion (engagement portion 565a) provided at the tip of the extension portion, and a connection portion 565s for connecting the extension portion 565t and the engagement portion 565a. And having.
- the extending portion 565t is connected to the inner periphery of the flange member 571. That is, the fixed end 565t of the extending portion 565t is provided on the inner periphery of the flange member 571.
- the extending portion 565t is a portion extending from the fixed end 565t toward the inside of the hollow portion of the flange member 571.
- the extending portion 565t is an elastic portion capable of elastic deformation.
- the free end side of the extending portion 565t (that is, the side on which the connecting portion 565s is provided) is located downstream of the fixed end 565t1 of the extending portion 575t in the rotation direction R of the drum unit (coupling unit). That is, the extending portion 565t is a portion extending from the fixed end 565t1 toward the free end thereof at least on the downstream side in the rotational direction R.
- the free end (that is, the connecting portion 565s and the engaging portion 565a) of the extending portion 575t is located on the inner side in the radial direction than the fixed end 565t1 of the extending portion 575t.
- the engaging portion 565a is a swollen portion provided at the tip of the extending portion 565t, and is a portion for entering the inside of the drive transmission groove 101a of the main body drive shaft 101.
- the engaging portion 565a is connected by a connecting portion 575s provided at the tip of the extending portion 575t.
- the connecting portion 575s is a portion formed by bending the distal end side of the extending portion 565t.
- the engaging portion 565a and the connecting portion 565s are projecting portions (projecting portions) projecting in a direction intersecting with the extending direction of the extending portion 565t.
- the engaging portion 565a is provided with a driving force receiving portion 565r. As shown in FIG. 52 (a), the driving force receiving portion 565r contacts the driving transmission groove 101a and receives the driving force. When the driving force receiving portion 565r receives the driving force, the driving force is transmitted to the flange member 571 via the fixed end 565t1 of the support portion 565. Since the flange member 571 is fixed to the photosensitive drum 1, the flange member 571 and the photosensitive drum 1 rotate integrally.
- the extending portion 575t and the engaging portion 565a are integrally formed with the flange member 570.
- the extending portion 575t and the engaging portion 565a are a part of the support portion 565 that supports the driving force receiving portion 565r so as to be movable.
- the extending portion 565t can be elastically deformed. That is, as shown in FIG. 52 (b), the engaging portion 565 a comes into contact with the outer peripheral surface of the main body drive shaft 101 in the process of inserting the cartridge 7 into the apparatus main body. Then, the extending portion 565a is elastically deformed so that the engaging portion 565a moves at least outward in the radial direction of the coupling unit.
- the extending portion 565t is deformed so as to be inclined with its fixed end 565t as a fulcrum.
- the engaging portion 565a moves in a direction crossing the direction in which the extending portion 565t extends.
- the engagement portion 565a enters the drive transmission groove 101a when the phases of the engagement portion 565a and the drive transmission groove 101a coincide. To do.
- the extending portion 565t can be regarded as a biasing portion that biases the engaging portion 565a toward at least the radially inner side.
- the engaging portion 565a is biased toward the inside of the drive transmission groove 101a by the elastic force (biasing force) of the extending portion 565t.
- the extending portion 565t plays a role corresponding to the urging member 72 in the first embodiment. That is, the support portion 565 is a portion that serves both as the urging member 72 and the engagement member 65 in the first embodiment.
- At least a part of the support part 565 and at least a part of the driving force receiving part 565r provided in the support part 565 are disposed inside the photosensitive drum 1 (see FIG. 52). This is the same as the urging member 72 and the engaging member 65 in the first embodiment.
- the flange member 571 is not easily deformed inside the photosensitive drum 1 because the flange member 571 is held by the photosensitive drum 1. In particular, if at least a part of the fixed end 565t of the support portion 565 is disposed inside the photosensitive drum 1, even if a driving force is transmitted to the flange member 571 via the fixed end 565t, the flange member 571 is deformed. It is suitable for suppressing.
- the extending portion is made of resin
- the elastic force and strength of the extending portion are increased by inserting an elastic metal (for example, a leaf spring) into the resin constituting the extending portion. Also good.
- the driving force receiving portion 565r provided in the engaging portion 565a receives a force from the inside of the drive transmission groove 101a.
- the drive transmission shaft 101a is driven, in order to ensure the engagement state between the drive transmission shaft 101a and the engagement portion 565a, more than half of the engagement portion 565a is provided with the engagement portion 565a. It is desirable to enter the interior.
- the engaging portion 565a is movable by a radius of the cross section of the engaging portion 565a (distance from the center of the engaging portion to the surface) or more. More preferably, the engagement portion 565a can move at least the diameter of the cross section of the engagement portion 565a (more than the width of the cross section of the engagement portion 565a and at least twice the distance from the center of the engagement portion to the surface). .
- the driving force receiving portion 565r receives the driving force F.
- a straight line LN1 is drawn in the normal direction of the driving force receiving portion 565r.
- the straight line LN1 extends toward the side where the driving force receiving portion 565r faces and is also a straight line along a vector indicating the driving force F.
- the fixed end 565t1 of the extending part 565t is arranged further upstream in the rotational direction R than the straight line LN1. That is, the support portion 565 is disposed across the straight line L1.
- a moment M1 is generated in the extending portion 565t in the same direction as the rotation direction of the drum unit (counterclockwise in the drawing) with the fixed end 565t as a fulcrum. .
- This moment M1 acts to bring the support portion 565 closer to the main body drive shaft 101. That is, the moment M1 acts to urge the engaging portion 565a toward the back of the drive transmission groove 101a.
- the engagement state between the engagement portion 565a and the drive transmission groove 101a can be stabilized.
- the support portion 565 can be molded as a part of the flange member 571, the flange member 571 having the support portion 565 can be easily manufactured.
- FIGS. 54 to 58 are sectional views of the coupling unit (flange member).
- the extending portions (665t, 665s) are bent, and the extending portions have a first extending portion 665s and a second extending portion 665t extending in different directions.
- the boundary of the 1st extension part 665ts 2nd extension part 665t is a bending part.
- the first extending portion 665s in this modification corresponds to the connecting portion 565s illustrated in FIG. That is, the first extending portion 665s (FIG. 54) is an extension of the connecting portion 565s (FIG. 52), and the first extending portion 665s is a connecting portion that connects the second extending portion 665t and the engaging portion 665a. is there.
- the connecting portion 565s shown in FIG. 52 can be regarded as the first extending portion
- the extending portion 565t can be regarded as the second extending portion.
- the first extending portion 665s and the engaging portion 665a can be regarded as a protruding portion (protruding portion) protruding in a direction intersecting with the second extending portion 665t.
- the first extending portion 665s of this modification is longer than the connecting portion 565s shown in FIG. Therefore, the flange member 671 of this modification is thinned accordingly (thickness is reduced).
- FIG. 55 shows a modified shape of the bulging part (engagement part).
- the bulging portion may be a polygon as described in the third embodiment.
- the cross-sectional shape of the engaging portion 765a is a substantially hexagonal shape.
- Such a cross-sectional shape can be regarded as a substantially circular shape.
- the cross-sectional shape of the engaging portion (swelling portion) may be a polygon.
- FIG. 56 Another modification is shown in FIG.
- the extending portion 865t is directly connected to the bulging portion (engaging portion 865a) without being bent.
- the center of the engaging portion 865a is shifted from the extension line of the extending portion 865t, and the engaging portion 865a is a protruding portion protruding in a direction intersecting with the extending portion 865t.
- the position of the fixed end 856t1 of the extending portion 865t is changed from the configuration shown in FIG. That is, the fixed end 865t1 is located on the downstream side in the rotation direction R with respect to the straight line L1 extending in the normal direction of the driving force receiving portion 865r.
- a moment in the clockwise direction in the drawing may be applied to the support portion 865 with the fixed end 865t1 as a fulcrum. This moment acts to move the engaging portion 865a away from the drive transmission groove 101a.
- FIG. 57 illustrates still another modification.
- the engaging portion is arranged at a position shifted from the extension line of the extending portion.
- the center of the engaging portion 965a is arranged on the extension line of the extending portion 965t.
- the engaging portion 965a is a protruding portion provided at the tip of the extending portion 965t, or protrudes (swells) toward the entire periphery of the extending portion 965t.
- the fixed end 965t1 of the support portion 965 is further arranged on the downstream side in the rotation direction R as compared with the above-described configuration shown in FIG. Therefore, when the driving force receiving portion of the engaging portion 965a receives the driving force, a moment may be applied to the support portion 965 in a direction in which the engaging portion 965a is separated from the drive transmission groove 101a.
- the elastic force of the extending portion 965t is further increased, or the friction coefficient of the surface of the engaging portion 965a is increased. It is preferable to take these measures.
- the elastic force of the extending portion 965t is increased to make the extending portion 965t difficult to bend, the force required for mounting the cartridge 7 to the apparatus main body increases. That is, in order to mount the cartridge 7, it is necessary to bend the extending portion 965t, and the load for that purpose increases. Therefore, it is preferable to set a necessary and sufficient elastic force as the extending portion 965t in consideration of the mounting property of the cartridge 7.
- a drum unit that can be attached to and detached from the electrophotographic image forming apparatus main body is provided.
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Abstract
Description
先ず、本実施例に係る電子写真画像形成装置(画像形成装置)の一実施例の全体構成について、図1を用いて説明する。
[プロセスカートリッジの概略]
[本体駆動軸の構成]
[カップリングユニットの構成]
図12はカップリングユニット28が感光体ドラム1に取り付けられた状態の断面図である。係合部65aを有する係合部材65は、カップリングユニット28内で、カップリングユニット28の半径方向内側に向かって付勢部材66により付勢された状態で支持される。
付勢部材66は弾性的に伸縮可能な圧縮コイルバネであり、圧縮バネが縮む方向への外力に対して、逆に圧縮バネが伸びる方向への反力を及ぼす。なお、付勢部材66は、本実施例のような圧縮コイルバネの他に、係合部材65に半径方向内側に付勢力を及ぼすように構成されればよいため、例えば板ばねや、ねじりコイルばねのような付勢部材(弾性部材、バネ部材)を使用してもよい。
[カートリッジの画像形成装置本体への装着]
上述のように斜め装着構成を採用しているため、カートリッジ7を装置本体100Aに装着する際に、感光体ドラム1と中間転写ベルト5の摺擦を抑制することができる。そのため、感光ドラム1の表面または中間転写ベルト5の表面に微小の傷(擦り傷)が生じることを抑制することが出来る。
[カップリングユニットの本体駆動軸への係合過程]
図20は、このようにして案内された本体駆動軸101がカップリングユニットの係合部材65に当接した状態を示す。本体駆動軸の半球形状101cは、係合部材65に形成された挿入テーパ面65kに当接する。
この状態からさらにカートリッジ7を奥に装着する方向へ力を加える。すると、カートリッジ装着方向の力が挿入テーパ面65kによって、係合部材65を半径方向の外側に退避する方向に力を及ぼす。そのため、本体駆動軸101の先端を挿入テーパ面65kに当接させた状態で、カートリッジ7をさらに装置本体の奥に移動させることが可能である。
図21、図23は、このようにしてカートリッジ7を奥に移動させ、カートリッジ7の装置本体100Aへの装着が完了した状態を示す。この状態は、本体駆動軸の半球形状101cが、カップリングユニットの円錐面72mと当接し、本体駆動軸101がカップリングユニット28に対して、軸方向および半径方向に位置決められた状態である。
係合部材65は、前述のように、フランジキャップ部材72の第1、2、3、4案内面によって、係合部材65の第1、2、3、4被案内面が案内されることによって、係合部先端が、本体駆動軸の軸部101f外周面に当接するまで半径方向に退避する。このとき、図23で示すように、係合部材65の付勢力に対する規制面65jは、フランジキャップ部材の規制面72jに対して離れている。また、付勢部材66は、本体駆動軸101がカップリングユニット28に挿入されない図15の状態よりも、さらに圧縮され縮んだ状態である。
そして、さらに図24の状態から本体駆動軸101が回転していくと、図25のように、本体駆動軸の駆動伝達面101bと、係合部の駆動力受け面65bとが当接して、感光体ドラム1に駆動伝達可能な状態となる。以上のようにして、係合部材の係合部65aは、本体駆動軸101に係合する。
図22に示すように、半球形状101cの中心101hは、Z方向において、係合部材65の駆動力受け面65bの範囲内L2に来るように、円錐形状72mを配置する。係合部65aおよび中心101hを、ドラムユニット30の軸線に投影すると、係合部65aの駆動力受け面65bの投影領域L2の内部に、中心101hの中心が配置される。このような配置関係を成立させることで、以下の効果が得られる。
図6、図22に示すように、本体駆動軸101は、半球形状101cが逆円錐形状533aに突き当たり、軸受け部101dと半球形状101cで両持ち支持の構成となる。すなわち、本体駆動軸101は、カップリングユニット28からみて、本体駆動軸101は半球形状の101cの中心101hを中心に傾く。Z軸方向において中心101hと同じ位置は、この傾く影響を最も受けない位置である。駆動力受け面65bが、Z軸方向において中心101hと同じ位置に配置されることが、位置ズレの影響を最も小さく出来る位置である。すなわち感光体ドラム1を安定して駆動出来る位置となる。
なお、本実施例では係合部材65側に駆動力を受けるための突起を設けたが、係合部材に駆動を受けるための溝を設け、本体駆動軸101側に、径方向に移動することで溝と係合可能な可動突起部を設けることも可能である。しかし、カートリッジ7に比べ、画像形成装置本体100Aはよりより高い耐久性を求められる。本実施例のように径方向に移動する可動部(係合部65)をカートリッジ7のカップリングユニット28側に設けた方が、画像形成装置本体100Aの耐久性を高める上では好ましい。
[本体駆動軸によるカップリングユニットの駆動]
まず、カップリング駆動時の係合部材65の支持構成について、詳しく説明する。図25に示すように、本体駆動軸101が矢印R方向に回転駆動されると、本体駆動軸の溝101aに形成された駆動伝達面101bが係合部材の係合部65aに形成された駆動力受け面65bに当接し、駆動力受け面65bの法線方向に力Fを及ぼす。駆動力受け面に駆動力Fが働くと、この力によって、係合部材の第1被案内面65dとフランジキャップの第1案内面72dが当接する。また、より好ましくは、係合部材の駆動軸当接面65cが本体駆動軸の軸部101f外周面に当接する。これにより係合部材65は、フランジキャップ部材72と本体駆動軸101の間で強固に支持される。
次に係合部材65に生じる力と、この力を利用した係合部材65の支持構成について説明する。
駆動力Fが係合部の駆動力受け面65bに対して垂直に加わると、駆動力Fが生じる向きは、カップリングユニットの周方向(円周方向)に対して径方向の内側に向かうように傾斜している。つまりカップリングユニットと同心状に駆動力受け面65bを通る仮想円を描くと、駆動力Fはこの仮想円の接線に対して半径方向内側に向かうように傾斜している。
そのため、駆動力Fは、上記仮想円の接線に沿った接線方向成分(周方向成分、回転方向成分)である力F1と、半径方向の内側に向かう径方向成分としての力F2とに分けられる。
また、より好ましくは、係合部材の駆動軸当接面65cを本体駆動軸の軸部101f外周面に当接させてもよい。
以上のようにして、係合部材65がフランジキャップ部材72と本体駆動軸101の間で強固に支持される。このことにより、係合部材65が本体駆動軸101から外れ、脱落するのを防止するとともに、本体駆動軸101からの駆動力を安定して係合部材65に伝達することが可能となる。そして、感光体ドラム1の駆動安定性を向上し、画像品質を向上させることを可能にする。
次に係合部の駆動力受け面65bの軸方向への傾斜について説明する。図26は、係合部材の係合部65aを、駆動力受け面65bの法線方向に延びる面で切り取った断面図である。つまり、図25で力Fの矢印の方向に切断した断面図である。ここで、本体駆動軸101の駆動伝達溝101aに形成された本体駆動伝達面101bと、係合部材の係合部65aに形成された駆動力受け面65bとが当接し、本体駆動軸101の駆動力が係合部材65に伝達される。
前述のように、本体駆動伝達面101bは、カップリングユニット28の軸線を中心に捻った形状であり、図26の断面図で、本体駆動伝達面101bは、本体駆動軸101の回転軸に対して傾斜している。係合部の駆動力受け面65bも、本体駆動伝達面101bと当接するために同じ捻り形状を有するため、本体駆動軸101の回転軸に対して駆動力受け面65bは傾斜している。より詳細にいうと、駆動力受け面65bは、ドラムユニットの軸線方向における外側のほうが、内側よりもドラムユニットの回転方向における上流側に配置される。
そのため、本体駆動伝達面101bから駆動力受け面65bへ働く法線方向の力Fは、回転軸方向の成分として、力F3を有する。すなわち、係合部材65およびカップリングユニット28を感光体ドラムの長手方向外側へと付勢する力F3が生じる。これにより、本体駆動軸101に対してカップリングユニット28が軸方向に離脱する方向に力が加わることを防止することができる。そして、図21に示すように、本体駆動軸の先端に形成された半球形状101cをフランジキャップ部材に形成された円錐形状72mへ突き当てる方向へと付勢する力が生じる。これによって、本体駆動軸の半球形状101cがフランジキャップ部材の円錐形状72mへ確実に突き当たるようになり、カップリングユニット28に対して、本体駆動軸101をより正確に位置決めをすることが可能となる。
駆動力受け面65bが受けた駆動力は、係合部材65からフランジキャップ部材72に伝達される。すなわち駆動力が、係合部材65の第1被案内面65dからフランジキャップ部材72の第1案内面72dに伝わる。第1案内面72dは、駆動力が伝達される被伝達部であり、フランジキャップ部材72は被伝達部材である。また、第1案内面72dは、係合部材65に駆動力が加わった際に、係合部65aがドラムユニット回転方向の下流側に移動してしまうのを抑えるバックアップ部でもある。また、第1被案内面65dは、フランジキャップ部材72に駆動力を伝達するための伝達部である。
また第1案内面72dは、駆動力受け面65bに対して傾いている。そのため、駆動力受け面65dに対して垂直に加わる駆動力Fは、第1案内面72dに沿って径方向の内側に向かう成分を有する。
この駆動力Fの成分によって、係合部65aは第1案内面72dに沿ってカップリングユニット28の径方向内側に向かって案内される。つまり、第1案内面72dは、駆動力Fが伝達される際に係合部65aや駆動力受け面65bを径方向の内側(すなわち駆動伝達溝101aの奥側)に向けて付勢するような方向に面している。
図25において、第1案内面72dの接線と、駆動受け面65dの接線とを延ばすと、これら2つの接線は、第1案内面72dや駆動受け面65dよりも径方向の外側において交わるように構成される。
また、ドラムユニットの回転方向Rにおいて、第1案内面72dは、その径方向内側がその径方向外側よりも下流側に配置されている(図25参照)。
係合部材65からフランジキャップ部材72に伝わった駆動力は、フランジ部材71を介して感光体ドラム1に伝達される。その結果、感光体ドラム1がカップリングユニット28とともに回転する。
すなわち図14に示されるように、フランジキャップ部材72は、フランジ部材71に設けられた凸部と係合するための位置規制溝72l(係合部、凹部)を有する。また、フランジ部材71の内周と嵌合する勘合面72kも有する。これら勘合面72kや位置規制溝72lを介してフランジ部材71に駆動力が伝達される。フランジ部材71は、感光体ドラム1に取り付けられていることから、フランジ部材71から最終的に感光体ドラム1に駆動力が伝達されることになる
なお、前述したように、駆動力受け面65bに捻じれた面とすることで、駆動力受け面65bに駆動力Fが加わった際にドラムユニット30が軸線方向の外側に付勢されるようにした。すなわち駆動力受け面65bに本体駆動軸101から駆動力が加わった際に、ドラムユニット30と本体駆動軸101が互いに引き寄せ合うように構成されている。なお、駆動力受け面65bは、ねじれた面と同等の機能を有する構成であれば、必ずしも捻じれた形状でなくてもよい。駆動力受け面65bは、前述の駆動力Fに対して、付勢力Fc2を生じさせる方向へ傾斜した面であればよく、面形状は例えば平面であっても曲面であってもよい。
また、図10、図12に示すように、フランジ部材71には、係合部材65が付勢部材66から受ける半径方向内側の付勢力に対して、その反力である半径方向外側の力を受ける、付勢部材との当接面(付勢部材当接部)71fが設けられる。当接面71fは付勢部材から押圧・付勢される押圧力受け部(付勢力受け部)である。また付勢部材を支えるための付勢部材支持部である。
[カップリングユニットの本体駆動軸からの抜去]
なお前述のように、駆動力受け面65bは、フランジ部材71の回転軸を中心にして捻じった形状になっている。その捻り方向は、駆動力受け面65bの感光体ドラムユニット30の外側(Z1方向側)が内側(Z2方向側)に対して、感光体ドラム1の回転方向上流側に配した。
逆回転する方法としては、カートリッジドア104の開動作に連動して、リンク機構等で本体駆動軸101を逆回転しても良いし、本体駆動軸101の駆動源のモータを逆回転する構成でも良い。
以上説明した実施例において、本発明に係わる作用および効果についてまとめて述べる。
本実施例では、カップリングユニット28内で半径方向に移動可能な係合部材65を設けたため、本体駆動軸101を軸線方向に退避する機構を用いることなく、良好にカートリッジ7の着脱および、カップリングユニット28による駆動伝達を可能とする。
係合部材65に形成された係合部65aは、カップリングユニット28の穴部72aから半径方向内側に向かって突出する。これにより、装置本体100Aから着脱可能に構成されるカートリッジ7において、係合部65aの保護を可能にする。
また、係合部に形成された駆動力受け面65bは半径方向内側に向かって延びる。そのため、本体駆動軸の溝部101aに係合部が入り込んだあと、駆動力受け面65bと溝部101aに形成された駆動伝達面101bが当接して良好に駆動伝達が行われることを可能にする。
また、カップリングユニット28の駆動時に、駆動力受け面65bが法線方向に受ける駆動力Fの方向が、感光体ドラム1の回転軸を中心とする仮想円の接線方向に対して、感光体ドラム1の半径方向内側に向かって傾斜するようにした。さらにこの駆動力Fの方向を、係合部材65が移動可能に案内される方向に対して傾斜し、その成す角度が鋭角であるようにした。これにより、係合部材65に半径方向外側へ力が加わるのを防止し、駆動力受け面65bが駆動伝達面101bから脱落するのを防止するとともに、本体駆動軸101からの駆動力を安定して係合部材65に伝達することを可能とした。そして、感光体ドラム1の駆動安定性を向上し、画像品質を向上させることを可能にした。
また、係合部材65には、本体駆動軸の軸部101f外周面に当接する駆動軸当接面65cを設けた。これにより、係合部材65に生じる回転モーメントMを、駆動軸当接面65cで支えることによって、係合部材65をより強固に支持し、駆動安定性を向上させることを可能とした。
また、駆動力受け面65bが法線方向に受ける駆動力Fの方向が、感光体ドラム1の回転軸の方向に対して、感光体ドラム1の長手方向外側に向かって傾斜しているようにした。これにより、本体駆動軸101に対してカップリングユニット28が軸方向に離脱する方向に力が加わることを防止することができる。
また、係合部65aには、感光体ドラム1の長手方向外側の一端部に挿入テーパ面65kと、挿入テーパ面65kを有する一端部とは逆側の他端部に抜去テーパ面65lとを形成するようにした。これにより、カートリッジ着脱時に、挿入テーパ面65kもしくは抜去テーパ面65lを本体駆動軸の溝部101aに当接させることにより、引っ掛かりなく、円滑にカートリッジ7の着脱が行えるようにした。
[電子写真画像形成装置の概略]
[プロセスカートリッジの概略]
[本体駆動軸の構成]
[カップリングユニットの構成]
図34はカップリングユニット4028をトナー供給ローラ4020に取り付けた斜視図である。
以下にカップリングユニット(カップリング部材)4028の構成について具体的に説明する。カップリングユニット4028は、図36の斜視図や、図38の断面図で示すように、カップリングカバー部材4071、カップリングホルダ部材4072、係合部材4065、付勢部材4066により構成される。
カップリングカバー部材4071は中空部を有する円筒状の部材であり、カップリングホルダ4072は、カップリングカバー部材4071の内部空間に配置される。
カップリングホルダ4072は係合部材4065をスライド移動可能に保持する保持部材である。
図38に示すように、係合部4065aを有する係合部材4065は、カップリングユニット4028内で、カップリングユニット4028の半径方向内側に向かって付勢部材4066により付勢された状態で支持される。
カップリングカバー部材4071は、図36に示すように、円筒状の形状を有し、カップリングホルダ部材4072の外周面4072kに取り付けられる。
付勢部材4066は弾性的に伸縮可能な弾性部材(圧縮コイルバネ)であり、圧縮バネが縮む方向への外力に対して、逆に圧縮バネが伸びる方向への反力を及ぼす。
係合部材4065は付勢部材4066によってカップリングユニット4028の少なくとも内側(径方向内側)に向かって付勢される。付勢部材4066は係合部材4065の当接面4065hと、カップリングカバー部材4071の内周面に挟まれた状態で圧縮されるため、付勢部材4066が伸びる方向に付勢力を及ぼすことにより、係合部材65を付勢する。
[カートリッジの画像形成装置本体への装着]
[カップリングユニットの本体駆動軸への係合過程]
[係合部材の係合部]
Claims (277)
- 凹部を有する駆動軸が設けられた電子写真画像形成装置本体に着脱可能に構成されたドラムユニットであって、
(1)感光体ドラムと、
(2)前記感光体ドラムに設けられたカップリング部材であって、(2−1)前記凹部へ進入することで前記感光体ドラムを回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)前記係合部材を少なくとも前記ドラムユニットの径方向にスライド可能に保持するように構成された保持部材と、(2−3)前記係合部材を付勢するように構成された付勢部材と、
を有するドラムユニット。 - 前記付勢部材は、前記係合部材を少なくとも前記ドラムユニットの径方向内側に向けて付勢している請求項1に記載のドラムユニット。
- 前記保持部材は、前記係合部材の前記ドラムユニットの径方向への移動を規制するための係止部を有する請求項1又は2に記載のドラムユニット。
- 前記係合部材は、前記付勢部材によって前記係止部に付勢されている請求項3に記載のドラムユニット。
- 前記係合部材は前記駆動力受け部が設けられた突出部を有する請求項1乃至4のいずれか1項に記載のドラムユニット。
- 前記駆動力受け部は、前記係合部材の移動方向に対して傾斜している請求項1乃至5のいずれか1項に記載のドラムユニット。
- 前記駆動力受け部は、前記駆動力を受けることで前記駆動軸の前記凹部に向かって付勢されるように傾斜している請求項1乃至6のいずれか1項に記載のドラムユニット。
- 前記駆動力受け部は、少なくとも前記ドラムユニットの径方向における外側に面している請求項1乃至7のいずれか1項に記載のドラムユニット。
- 前記係合部材は、前記駆動軸の周面に当接するための駆動軸当接部を有する請求項1乃至8のいずれか1項に記載のドラムユニット。
- 前記駆動軸当接部の少なくとも一部は、前記駆動力受け部よりも前記ドラムユニットの回転方向における上流側に配置されている請求項9に記載のドラムユニット。
- 前記駆動軸当接部は、前記ドラムユニットの周方向に倣って曲がり、前記ドラムユニットの径方向の内側に向かって面している請求項9または10に記載のドラムユニット。
- 前記係合部材は、前記駆動軸当接部に対して突出している突出部を有し、
前記突出部に前記駆動力受け部が設けられている請求項11に記載のドラムユニット。 - 前記突出部は、少なくとも前記ドラムユニットの径方向の内側に向けて突出している請求項12に記載のドラムユニット。
- 前記保持部材は中空部を有し、
前記係合部材は、前記中空部の内部に向けて付勢されている請求項1乃至13のいずれか1項に記載のドラムユニット。 - 前記保持部材は中空部を有し、
前記駆動力受け部は、前記中空部の内部に露出している請求項1乃至14のいずれか1項に記載のドラムユニット。 - 前記係合部材の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項1乃至15のいずれか1項に記載のドラムユニット。
- 前記駆動力受け部の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項1乃至16のいずれか1項に記載のドラムユニット。
- 前記付勢部材は弾性部材である請求項1乃至17のいずれか1項に記載のドラムユニット。
- 前記付勢部材の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項1乃至18のいずれか1項に記載のドラムユニット。
- 前記カップリング部材は、前記付勢部材からの付勢力を受けて前記付勢部材を支えるための付勢部材支持部を有し、
前記付勢部材支持部の少なくとも一部が、前記感光体ドラムの内部に配置されている請求項1乃至19のいずれか1項に記載のドラムユニット。 - 前記保持部材は、前記係合部材から前記駆動力が伝達されるための被伝達部を有する請求項1乃至20のいずれか1項に記載のドラムユニット。
- 前記被伝達部は、前記駆動力が伝達された際に前記駆動力受け部を前記凹部に向けて付勢するように構成されている請求項21に記載のドラムユニット。
- 前記被伝達部は、前記駆動力受け部に対して傾斜している請求項21又は22に記載のドラムユニット。
- 前記被伝達部は前記係合部材を案内するためのガイドを兼ねる請求項21乃至23のいずれか1項に記載のドラムユニット。
- 前記保持部材は、前記感光体ドラムに対して固定されている請求項1乃至24のいずれか1項に記載のドラムユニット。
- 前記保持部材は、前記係合部材を案内するためのガイドを有する請求項1乃至25のいずれか1項に記載のドラムユニット。
- 前記ガイドは、前記感光体ドラムの回転方向において前記係合部材の上流側を案内する請求項26に記載のドラムユニット。
- 前記ガイドは、前記感光体ドラムの回転方向において前記係合部材の下流側を案内する請求項26に記載のドラムユニット。
- 前記ガイドは、前記感光体ドラムの回転方向において前記係合部材の上流側を案内するための上流側ガイドと、前記回転方向において前記係合部材の下流側を案内するための下流側ガイドと、を有する請求項26に記載のドラムユニット。
- 前記上流側ガイドと前記下流側ガイドは、実質的に互いに平行となるように配置されている請求項29に記載のドラムユニット。
- 前記保持部材は、実質的に互いに平行な2つのガイドを有し、
前記2つのガイドによって前記係合部材がガイドされる請求項1乃至25のいずれか1項に記載のドラムユニット。 - 前記駆動力受け部は前記駆動力を受けることによって、前記ドラムユニットと前記駆動軸を引き寄せあうように構成されている請求項1乃至31のいずれか1項に記載のドラムユニット。
- 前記ドラムユニットの軸線方向において、前記駆動力受け部の内側は、前記駆動力受け部の外側よりも前記ドラムユニットの回転方向における下流側に配置される請求項1乃至32のいずれか1項に記載のドラムユニット。
- 前記駆動力受け部は少なくとも前記ドラムユニットの軸線方向における内側に面している請求項1乃至33のいずれか1項に記載のドラムユニット。
- 前記付勢部材は前記保持部材と別体に構成されている請求項1乃至33のいずれか1項に記載のドラムユニット。
- 前記付勢部材は前記係合部材と別体に構成されている請求項1乃至35のいずれか1項に記載のドラムユニット。
- 前記ドラムユニットの径方向に沿って前記付勢部材と前記係合部材が配置されている請求項1乃至36のいずれか1項に記載のドラムユニット。
- 前記付勢部材は伸縮可能に構成されている請求項1乃至37のいずれか1項に記載のドラムユニット。
- 前記付勢部材はコイルバネである請求項1乃至38のいずれか1項に記載のドラムユニット。
- 凹部を有する駆動軸が設けられた電子写真画像形成装置本体に着脱可能に構成されたドラムユニットであって、
(1)感光体ドラムと、
(2)前記感光体ドラムに設けられたカップリング部材であって、(2−1)前記凹部へ進入することで前記感光体ドラムを回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)前記係合部材を移動可能に保持するように構成された保持部材と、
を有し、
前記保持部材は、(2−2−1)前記ドラムユニットの回転方向において前記係合部材の上流側をガイドする上流側ガイドと、(2−2−2)前記係合部材の下流側をガイドする下流側ガイドと、を有するカートリッジ。 - 前記保持部材は、前記係合部材から前記駆動力が伝達されるための被伝達部を有する請求項40に記載のドラムユニット。
- 前記被伝達部は、前記駆動力が伝達された際に前記駆動力受け部を前記凹部に向けて付勢するように構成されている請求項41に記載のドラムユニット。
- 前記被伝達部は、前記駆動力受け部に対して傾斜している請求項42に記載のドラムユニット。
- 前記被伝達部は前記下流側ガイドに設けられている請求項41乃至43のいずれか1項に記載のドラムユニット。
- 前記上流側ガイドと前記下流側ガイドは、実質的に互いに平行となるように配置されている請求項40乃至44のいずれか1項に記載のドラムユニット。
- 前記上流側ガイドと前記下流側ガイドは、前記係合部材を前記ドラムユニットの径方向に沿うようにガイドする請求項40乃至45のいずれか1項に記載のドラムユニット。
- 前記駆動力受け部の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項40乃至46のいずれか1項に記載のドラムユニット。
- 前記係合部材を付勢するための付勢部材を有する請求項40乃至47のいずれか1項に記載のドラムユニット。
- 前記付勢部材の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項48に記載のドラムユニット。
- 前記カップリング部材は、前記付勢部材からの付勢力を受けて前記付勢部材を支えるための付勢部材支持部を有し、
前記付勢部材支持部の少なくとも一部が、前記感光体ドラムの内部に配置されている請求項48又は49に記載のドラムユニット。 - 凹部を有する駆動軸が設けられた電子写真画像形成装置本体に着脱可能に構成されたドラムユニットであって、
(1)感光体ドラムと、
(2)前記感光体ドラムに設けられたカップリング部材であって、(2−1)前記凹部へ進入することで前記感光体ドラムを回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)実質的に互いに平行に配置された2つのガイドを有し、前記2つのガイドによって前記係合部材をガイド可能に保持するよう構成された保持部材と、を有するドラムユニット。 - 前記2つのガイドは、前記係合部材を前記ドラムユニットの径方向に沿うようにガイドする請求項51に記載のドラムユニット。
- 前記駆動力受け部の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項51または52に記載のドラムユニット。
- 前記係合部材を付勢するように構成された付勢部材を有する請求項51乃至53のいずれか1項に記載のドラムユニット。
- 前記カップリング部材は、前記付勢部材からの付勢力を受けて前記付勢部材を支えるための付勢部材支持部を有し、
前記付勢部材支持部の少なくとも一部が、前記感光体ドラムの内部に配置されている請求項54に記載のドラムユニット。 - 凹部を有する駆動軸が設けられた電子写真画像形成装置本体に着脱可能に構成されたドラムユニットであって、
(1)感光体ドラムと、
(2)前記感光体ドラムに設けられたカップリング部材であって、(2−1)前記凹部へ進入することで前記感光体ドラムを回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)前記駆動力受け部を少なくとも前記ドラムユニットの径方向における内側に向けて付勢するように構成された付勢部材と、
を有し、
前記付勢部材と前記係合部材は前記ドラムユニットの径方向に沿って配置されているカートリッジ。 - 前記駆動力受け部の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項56に記載のドラムユニット。
- 前記付勢部材の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項56又は57に記載のドラムユニット。
- 前記カップリング部材は、前記付勢部材からの付勢力を受けて前記付勢部材を支えるための付勢部材支持部を有し、
前記付勢部材支持部の少なくとも一部が、前記感光体ドラムの内部に配置されている請求項56乃至58のいずれか1項に記載のドラムユニット。 - 凹部を有する駆動軸が設けられた電子写真画像形成装置本体に着脱可能に構成されたドラムユニットであって、
(1)感光体ドラムと、
(2)前記感光体ドラムに設けられたカップリング部材であって、(2−1)前記凹部へ進入することで前記感光体ドラムを回転させるための駆動力を受けるように構成された駆動力受け部を有し、移動可能な係合部材と、(2−2)伸縮可能であって、前記係合部材を少なくとも前記ドラムユニットの径方向における内側に向けて付勢するように構成された付勢部材と、を有するカップリング部材と、
を有するドラムユニット。 - 前記付勢部材は、コイルバネである請求項60に記載のドラムユニット。
- 前記付勢部材の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項60または61に記載のドラムユニット。
- 前記カップリング部材は、前記付勢部材からの付勢力を受けて前記付勢部材を支えるための付勢部材支持部を有し、
前記付勢部材支持部の少なくとも一部が、前記感光体ドラムの内部に配置されている請求項60乃至62のいずれか1項に記載のドラムユニット。 - 電子写真画像形成装置本体に着脱可能に構成されたドラムユニットであって、
(1)感光体ドラムと、
(2)前記感光体ドラムに設けられたカップリング部材であって、(2−1)前記感光体ドラムを回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)前記係合部材をスライド可能に保持するように構成された保持部材と、(2−3)前記係合部材を付勢するように構成された付勢部材と、
を有し、
前記係合部材は、前記駆動力受け部が設けられた突出部を有するドラムユニット。 - 前記付勢部材は、前記係合部材を少なくとも前記ドラムユニットの径方向内側に向けて付勢している請求項64に記載のドラムユニット。
- 前記保持部材は、前記係合部材の前記ドラムユニットの径方向への移動を規制するための係止部を有する請求項64または65に記載のドラムユニット。
- 前記係合部材は、前記付勢部材によって前記係止部に付勢されている請求項66に記載のドラムユニット。
- 前記駆動力受け部は、前記係合部材の移動方向に対して傾斜している請求項64乃至67のいずれか1項に記載のドラムユニット。
- 前記駆動力受け部は、前記駆動力を受けることで少なくとも前記ドラムユニットの径方向の内側に向けて付勢されるように傾斜している請求項64乃至67のいずれか1項に記載のドラムユニット。
- 前記駆動力受け部は、少なくとも前記ドラムユニットの径方向における外側に面している請求項64乃至69のいずれか1項に記載のドラムユニット。
- 前記係合部材は、前記ドラムユニットの周方向に倣って曲がり、前記ドラムユニットの径方向の内側に面している曲面を有し、
前記突出部は前記係合部材の前記曲面に対して突出している請求項64乃至70のいずれか1項に記載のドラムユニット。 - 前記係合部材の前記曲面の少なくとも一部は、前記駆動力受け部よりも前記ドラムユニットの回転方向における上流側に配置されている請求項71に記載のドラムユニット。
- 前記突出部は、少なくとも前記ドラムユニットの径方向の内側に向けて突出している請求項64乃至72のいずれか1項に記載のドラムユニット。
- 前記保持部材は中空部を有し、
前記係合部材は、前記中空部の内部に向けて付勢されている請求項64乃至73のいずれか1項に記載のドラムユニット。 - 前記保持部材は中空部を有し、
前記駆動力受け部は、前記中空部の内部に露出している請求項64乃至73のいずれか1項に記載のドラムユニット。 - 前記係合部材の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項64乃至75のいずれか1項に記載のドラムユニット。
- 前記駆動力受け部の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項64乃至76のいずれか1項に記載のドラムユニット。
- 前記付勢部材は伸縮可能に構成されている請求項64乃至77のいずれか1項に記載のドラムユニット。
- 前記付勢部材は弾性部材である請求項64乃至77のいずれか1項に記載のドラムユニット。
- 前記付勢部材はコイルバネである請求項64乃至79のいずれか1項に記載のドラムユニット。
- 前記付勢部材の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項64乃至80のいずれか1項に記載のドラムユニット。
- 前記カップリング部材は、前記付勢部材からの付勢力を受けて前記付勢部材を支えるための付勢部材支持部を有し、
前記付勢部材支持部の少なくとも一部が、前記感光体ドラムの内部に配置されている請求項64乃至81のいずれか1項に記載のドラムユニット。 - 前記保持部材は、前記係合部材から前記駆動力が伝達されるための被伝達部を有する請求項64乃至82のいずれか1項に記載のドラムユニット。
- 前記被伝達部は、前記駆動力が伝達された際に前記駆動力受け部を少なくとも前記ドラムユニットの径方向の内側に向けて付勢するように構成されている請求項83に記載のドラムユニット。
- 前記被伝達部は、前記駆動力受け部に対して傾斜している請求項83または84に記載のドラムユニット。
- 前記被伝達部は前記係合部材をガイドするためのガイドを兼ねる請求項83乃至85のいずれか1項に記載のドラムユニット。
- 前記保持部材は、前記感光体ドラムに対して固定されている請求項64乃至86のいずれか1項に記載のドラムユニット。
- 前記保持部材は、前記係合部材をガイドするためのガイドを有する請求項64乃至87のいずれか1項に記載のドラムユニット。
- 前記ガイドは、前記感光体ドラムの回転方向において前記係合部材の上流側をガイドする請求項88に記載のドラムユニット。
- 前記ガイドは、前記感光体ドラムの回転方向において前記係合部材の下流側をガイドする請求項88に記載のドラムユニット。
- 前記ガイドは、前記感光体ドラムの回転方向において前記係合部材の上流側をガイドするための上流側ガイドと、前記回転方向において前記係合部材の下流側をガイドするための下流側ガイドと、を有する請求項88に記載のドラムユニット。
- 前記上流側ガイドと前記下流側ガイドは、実質的に互いに平行となるように配置されている請求項91に記載のドラムユニット。
- 前記保持部材は、実質的に互いに平行な2つのガイドを有し、
前記2つのガイドに対して前記係合部材がガイドされる請求項64乃至87のいずれか1項に記載のドラムユニット。 - 前記ドラムユニットの軸線方向において、前記駆動力受け部の内側は、前記駆動力受け部の外側よりも前記ドラムユニットの回転方向における下流側に配置される請求項64乃至93のいずれか1項に記載のドラムユニット。
- 前記駆動力受け部は少なくとも前記ドラムユニットの軸線方向における内側に面している請求項64乃至93のいずれか1項に記載のドラムユニット。
- 前記付勢部材は前記保持部材と別体に構成されている請求項64乃至95のいずれか1項に記載のドラムユニット。
- 前記付勢部材は前記係合部材と別体に構成されている請求項64乃至996のいずれか1項に記載のドラムユニット。
- 前記ドラムユニットの径方向に沿って前記付勢部材と前記係合部材が配置されている請求項64乃至97のいずれか1項に記載のドラムユニット。
- 電子写真画像形成装置本体に着脱可能に構成されたドラムユニットであって、
(1)感光体ドラムと、
(2)前記感光体ドラムに設けられたカップリング部材であって、(2−1)前記感光体ドラムを回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)前記係合部材をスライド可能に保持するように構成された保持部材と、(2−3)前記係合部材を付勢するように構成された付勢部材と、
を有し、
前記駆動力受け部は、少なくとも前記ドラムユニットの径方向における内側に向けて延びているドラムユニット。 - 前記駆動力受け部は、前記係合部材の移動方向に対して傾斜している請求項99に記載のドラムユニット。
- 前記駆動力受け部は、前記駆動力を受けることで少なくとも前記径方向の内側に向けて付勢されるように傾斜している請求項99または100に記載のドラムユニット。
- 前記駆動力受け部は、少なくとも前記ドラムユニットの径方向における外側に面している請求項99乃至101のいずれか1項に記載のドラムユニット。
- 前記駆動力受け部の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項99乃至102のいずれか1項に記載のドラムユニット。
- 電子写真画像形成装置本体に着脱可能に構成されたドラムユニットであって、
(1)感光体ドラムと、
(2)前記感光体ドラムに設けられたカップリング部材であって、前記ドラムユニットの軸線と垂直な断面の形状が略円形の係合部を有するカップリング部材と、
を有し、
前記係合部は、前記感光体ドラムを回転させるための駆動力を受けるように構成された駆動力受け部を有し、前記断面の半径以上の距離を移動可能であるドラムユニット。 - 前記係合部の少なくとも一部が、少なくとも前記ドラムユニットの径方向における外側に面している請求項104に記載のドラムユニット。
- 前記係合部の少なくとも一部が、少なくとも前記感光体ドラムの内部に配置されている請求項104又は105に記載のドラムユニット。
- 前記係合部は、前記断面の直径以上の距離を移動可能である請求項104乃至106のいずれか1項に記載のドラムユニット。
- 電子写真画像形成装置本体に着脱可能に構成されたドラムユニットであって、
(1)感光体ドラムと、
(2)前記感光体ドラムに設けられたカップリング部材であって、前記ドラムユニットの軸線と垂直な断面の形状が膨らんでいる膨らみ部を有するカップリング部材と、
を有し、
前記膨らみ部は、前記感光体ドラムを回転させるための駆動力を受けるように構成された駆動力受け部を有し、前記断面の中心から表面までの距離以上を移動可能であるドラムユニット。 - 前記膨らみ部の少なくとも一部が、少なくとも前記ドラムユニットの径方向における外側に面している請求項108に記載のドラムユニット。
- 前記膨らみ部は、前記断面の直径以上の距離を移動可能である請求項108または109に記載のドラムユニット。
- 前記膨らみ部の少なくとも一部が、前記感光体ドラムの内部に配置されている請求項108乃至110のいずれか1項に記載のドラムユニット。
- 前記膨らみ部の少なくとも一部が、前記感光体ドラムの内部に配置されている請求項108乃至111のいずれか1項に記載のドラムユニット。
- 前記断面の中心から表面までの距離の2倍以上を移動可能である請求項108乃至112のいずれか1項に記載のドラムユニット。
- 電子写真画像形成装置本体に着脱可能に構成されたドラムユニットであって、
(1)感光体ドラムと、
(2)前記感光体ドラムに設けられたカップリング部材であって、(2−1)前記感光体ドラムを回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)前記係合部材を移動可能に保持するように構成された保持部材と、
を有し、
前記保持部材は、(2−2−1)前記ドラムユニットの回転方向において前記係合部材の上流側をガイドする上流側ガイドと、(2−2−2)前記係合部材の下流側をガイドする下流側ガイドと、を有し、
前記駆動力受け部は、少なくとも前記ドラムユニットの径方向における内側に向けて延びているドラムユニット。 - 前記保持部材は、前記係合部材から前記駆動力が伝達されるための被伝達部を有する請求項114に記載のドラムユニット。
- 前記被伝達部は、前記駆動力が伝達された際に前記駆動力受け部を前記ドラムユニットの径方向における内側に向けて付勢するように構成されている請求項115に記載のドラムユニット。
- 前記被伝達部は、前記駆動力受け部に対して傾斜している請求項115または115のいずれか1項に記載のドラムユニット。
- 前記被伝達部は前記下流側ガイドに設けられている請求項115乃至117のいずれか1項に記載のドラムユニット。
- 前記上流側ガイドと前記下流側ガイドは、実質的に互いに平行となるように配置されている請求項114乃至118のいずれか1項に記載のドラムユニット。
- 前記上流側ガイドと前記下流側ガイドは、前記係合部材を前記ドラムユニットの径方向に沿うようにガイドする請求項114乃至119のいずれか1項に記載のドラムユニット。
- 前記駆動力受け部の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項114乃至120のいずれか1項に記載のドラムユニット。
- 前記係合部材を付勢するための付勢部材を有する請求項114乃至121のいずれか1項に記載のドラムユニット。
- 前記付勢部材の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項122のいずれか1項に記載のドラムユニット。
- 前記カップリング部材は、前記付勢部材からの付勢力を受けて前記付勢部材を支えるための付勢部材支持部を有し、
前記付勢部材支持部の少なくとも一部が、前記感光体ドラムの内部に配置されている請求項122又は123に記載のドラムユニット。 - 電子写真画像形成装置本体に着脱可能に構成されたドラムユニットであって、
(1)感光体ドラムと、
(2)前記感光体ドラムに設けられたカップリング部材であって、(2−1)前記凹部へ進入することで前記感光体ドラムを回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)実質的に互いに平行に配置された2つのガイドを有し、前記2つのガイドによって前記係合部材をガイド可能に保持するよう構成された保持部材と、を有するドラムユニット。 - 前記2つのガイドは、前記係合部材を前記ドラムユニットの径方向に沿うようにガイドする請求項125に記載のドラムユニット。
- 前記駆動力受け部の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項125または126に記載のドラムユニット。
- 前記係合部材を付勢するための付勢部材を有する請求項125乃至127のいずれか1項に記載のドラムユニット。
- 前記カップリング部材は、前記付勢部材からの付勢力を受けて前記付勢部材を支えるための付勢部材支持部を有し、
前記付勢部材支持部の少なくとも一部が、前記感光体ドラムの内部に配置されている請求項128に記載のドラムユニット。 - 電子写真画像形成装置本体に着脱可能に構成されたドラムユニットであって、
(1)感光体ドラムと、
(2)前記感光体ドラムに設けられたカップリング部材であって、(2−1)前記感光体ドラムを回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)前記駆動力受け部を少なくとも前記ドラムユニットの径方向における内側に向けて付勢するように構成された付勢部材と、
を有し、
前記付勢部材と前記係合部材は前記ドラムユニットの径方向に沿って配置されているドラムユニット。 - 前記駆動力受け部の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項130に記載のドラムユニット。
- 前記付勢部材の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項130または131に記載のドラムユニット。
- 前記カップリング部材は、前記付勢部材からの付勢力を受けて前記付勢部材を支えるための付勢部材支持部を有し、
前記付勢部材支持部の少なくとも一部が、前記感光体ドラムの内部に配置されている請求項130乃至132のいずれか1項に記載のドラムユニット。 - 電子写真画像形成装置本体に着脱可能に構成されたドラムユニットであって、
(1)感光体ドラムと、
(2)前記感光体ドラムに設けられたカップリング部材であって、(2−1)前記感光体ドラムを回転させるための駆動力を受けるように構成された駆動力受け部を有し、移動可能な係合部材と、(2−2)伸縮可能であって、前記係合部材を少なくとも前記ドラムユニットの径方向における内側に向けて付勢するように構成された付勢部材と、を有するカップリング部材と、を有し、
前記駆動力受け部は、少なくとも前記ドラムユニットの径方向における内側に向けて延びているドラムユニット。 - 前記付勢部材は、コイルバネである請求項134に記載のドラムユニット。
- 前記付勢部材の少なくとも一部は、前記感光体ドラムの内部に配置されている請求項134または135に記載のドラムユニット。
- 前記カップリング部材は、前記付勢部材からの付勢力を受けて前記付勢部材を支えるための付勢部材支持部を有し、
前記付勢部材支持部の少なくとも一部が、前記感光体ドラムの内部に配置されている請求項134乃至136のいずれか1項に記載のドラムユニット。 - 請求項1乃至137のいずれか1項に記載のドラムユニットと、
前記ドラムユニットを回転可能に支持するための枠体と、
を有し、前記電子写真画像形成装置本体に着脱可能なカートリッジ。 - 凹部を有する駆動軸が設けられた電子写真画像形成装置本体に着脱可能に構成されたカートリッジであって、
(1)その表面に現像剤を担持して回転するように構成された回転体と、
(2)カップリング部材であって、(2−1)前記凹部へ進入することで前記回転体を回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)前記係合部材を少なくとも前記カップリング部材の径方向にスライド可能に保持するように構成された保持部材と、(2−3)前記係合部材を付勢するように構成された付勢部材と、
を有するカートリッジ。 - 前記付勢部材は、前記係合部材を少なくとも前記カップリング部材の径方向内側に向けて付勢している請求項139に記載のカートリッジ。
- 前記保持部材は、前記係合部材の前記カップリング部材の径方向への移動を規制するための係止部を有する請求項139または140に記載のカートリッジ。
- 前記係合部材は前記係止部に付勢されている請求項114に記載のカートリッジ。
- 前記係合部材は前記駆動力受け部が設けられた突出部を有する請求項139乃至142のいずれか1項に記載のカートリッジ。
- 前記駆動力受け部は、前記係合部材の移動方向に対して傾斜している請求項139乃至143のいずれか1項に記載のカートリッジ。
- 前記駆動力受け部は、前記駆動力を受けることで前記駆動軸の前記凹部に向かって付勢されるように傾斜している請求項139乃至144のいずれか1項に記載のカートリッジ。
- 前記駆動力受け部は、少なくとも前記カップリング部材の径方向における外側に面している請求項139乃至145のいずれか1項に記載のカートリッジ。
- 前記係合部材は、前記駆動軸の周面に当接するための駆動軸当接部を有する請求項139乃至146のいずれか1項に記載のカートリッジ。
- 前記駆動軸当接部の少なくとも一部は、前記駆動力受け部よりも前記カートリッジの回転方向における上流側に配置されている請求項147に記載のカートリッジ。
- 前記駆動軸当接部は、前記カートリッジの周方向に倣って曲がり、前記カップリング部材の径方向の内側に向かって面している請求項148に記載のカートリッジ。
- 前記係合部材は、前記駆動軸当接部に対して突出している突出部を有し、
前記突出部に前記駆動力受け部が設けられている請求項147乃至149のいずれか1項に記載のカートリッジ。 - 前記突出部は、少なくとも前記カップリング部材の径方向の内側に向けて突出している請求項150に記載のカートリッジ。
- 前記保持部材は中空部を有し、
前記係合部材は、前記中空部の内部に向けて付勢されている請求項139乃至151のいずれか1項に記載のカートリッジ。 - 前記保持部材は中空部を有し、
前記駆動力受け部は、前記中空部の内部に露出している請求項139乃至152のいずれか1項に記載のカートリッジ。 - 前記係合部材の少なくとも一部は、前記回転体の内部に配置されている請求項139乃至153のいずれか1項に記載のカートリッジ。
- 前記駆動力受け部の少なくとも一部は、前記回転体の内部に配置されている請求項139乃至154のいずれか1項に記載のカートリッジ。
- 前記付勢部材は弾性部材である請求項139乃至155のいずれか1項に記載のカートリッジ。
- 前記付勢部材の少なくとも一部は、前記回転体の内部に配置されている請求項139乃至156のいずれか1項に記載のカートリッジ。
- 前記カップリング部材は、前記付勢部材からの付勢力を受けて前記付勢部材を支えるための付勢部材支持部を有し、
前記付勢部材支持部の少なくとも一部が、前記回転体の内部に配置されている請求項139乃至157のいずれか1項に記載のカートリッジ。 - 前記保持部材は、前記係合部材から前記駆動力が伝達されるための被伝達部を有する請求項158に記載のカートリッジ。
- 前記被伝達部は、前記駆動力が伝達された際に前記駆動力受け部を前記凹部に向けて付勢するように構成されている請求項159に記載のカートリッジ。
- 前記被伝達部は、前記駆動力受け部に対して傾斜している請求項159または160に記載のカートリッジ。
- 前記被伝達部は前記係合部材をガイドするためのガイドを兼ねる請求項159乃至161のいずれか1項に記載のカートリッジ。
- 前記保持部材は、前記回転体に対して固定されている請求項139乃至162のいずれか1項に記載のカートリッジ。
- 前記保持部材は、前記係合部材をガイドするためのガイドを有する請求項139乃至163のいずれか1項に記載のカートリッジ。
- 前記ガイドは、前記回転体の回転方向において前記係合部材の上流側をガイドする請求項164に記載のカートリッジ。
- 前記ガイドは、前記回転体の回転方向において前記係合部材の下流側をガイドする請求項164に記載のカートリッジ。
- 前記ガイドは、前記回転体の回転方向において前記係合部材の上流側をガイドするための上流側ガイドと、前記回転方向において前記係合部材の下流側をガイドするための下流側ガイドと、を有する請求項164に記載のカートリッジ。
- 前記上流側ガイドと前記下流側ガイドは、実質的に互いに平行となるように配置されている請求項167に記載のカートリッジ。
- 前記保持部材は、実質的に互いに平行な2つのガイドを有し、
前記2つのガイドに対して前記係合部材がスライドする請求項139乃至163のいずれか1項に記載のカートリッジ。 - 前記駆動力受け部は前記駆動力を受けることによって、前記カートリッジと前記駆動軸を引き寄せあうように構成されている請求項139乃至169のいずれか1項に記載のカートリッジ。
- 前記カップリング部材の軸線方向において、前記駆動力受け部の内側は、前記駆動力受け部の外側よりも前記カップリング部材の回転方向における下流側に配置される請求項139乃至170のいずれか1項に記載のカートリッジ。
- 前記駆動力受け部は少なくとも前記カップリング部材の軸線方向における内側に面している請求項139乃至171のいずれか1項に記載のカートリッジ。
- 前記付勢部材は前記保持部材と別体に構成されている請求項139乃至172のいずれか1項に記載のカートリッジ。
- 前記付勢部材は前記係合部材と別体に構成されている請求項139乃至171のいずれか1項に記載のカートリッジ。
- 前記カップリング部材の径方向に沿って前記付勢部材と前記係合部材が配置されている請求項139乃至174のいずれか1項に記載のカートリッジ。
- 前記付勢部材は伸縮可能に構成されている請求項139乃至175のいずれか1項に記載のカートリッジ。
- 前記付勢部材はコイルバネである請求項139乃至176のいずれか1項に記載のカートリッジ。
- 前記回転体は、感光体ドラムである請求項139乃至177のいずれか1項に記載のカートリッジ。
- 前記回転体は、現像ローラである請求項139乃至177のいずれか1項に記載のカートリッジ。
- 前記カートリッジは、前記現像ローラに現像剤を供給する供給ローラを有する請求項179に記載のカートリッジ。
- 前記供給ローラは、前記カップリング部材が受けた駆動力によって回転する請求項180に記載のカートリッジ。
- 前記回転体は、現像ローラに現像剤を供給するための供給ローラである請求項139乃至177のいずれか1項に記載のカートリッジ。
- 前記回転体はシャフトを有し、前記シャフトに前記カップリング部材が取り付けられている請求項139乃至182のいずれか1項に記載のカートリッジ。
- 凹部を有する駆動軸が設けられた電子写真画像形成装置本体に着脱可能に構成されたカートリッジであって、
(1)その表面に現像剤を担持して回転するように構成された回転体と、
(2)カップリング部材であって、(2−1)前記凹部へ進入することで前記回転体を回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)前記係合部材を移動可能に保持するように構成された保持部材と、
を有し、
前記保持部材は、(2−2−1)前記カートリッジの回転方向において前記係合部材の上流側をガイドする上流側ガイドと、(2−2−2)前記係合部材の下流側をガイドする下流側ガイドと、を有するカートリッジ。 - 前記係合部材を付勢するための付勢部材を有する請求項184に記載のカートリッジ。
- 前記上流側ガイドと前記下流側ガイドの間に、前記付勢部材が配置される請求項185に記載のカートリッジ。
- 前記保持部材は、前記係合部材の前記カップリング部材の径方向への移動を規制するための係止部を有する請求項184乃至186のいずれか1項に記載のカートリッジ。
- 前記係合部材は前記係止部に付勢されている請求項187に記載のカートリッジ。
- 前記係合部材は前記駆動力受け部が設けられた突出部を有する請求項184乃至188のいずれか1項に記載のカートリッジ。
- 前記駆動力受け部は、前記係合部材の移動方向に対して傾斜している請求項184乃至189のいずれか1項に記載のカートリッジ。
- 前記駆動力受け部は、前記駆動力を受けることで前記駆動軸の前記凹部に向かって付勢されるように傾斜している請求項184乃至190のいずれか1項に記載のカートリッジ。
- 前記保持部材は、前記係合部材から前記駆動力が伝達されるための被伝達部を有する請求項184乃至190のいずれか1項に記載のカートリッジ。
- 前記被伝達部は、前記駆動力が伝達された際に前記駆動力受け部を前記凹部に向けて付勢するように構成されている請求項192に記載のカートリッジ。
- 前記被伝達部は、前記駆動力受け部に対して傾斜している請求項192または193に記載のカートリッジ。
- 前記被伝達部は前記下流側ガイドに設けられている請求項192乃至194のいずれか1項に記載のカートリッジ。
- 前記上流側ガイドと前記下流側ガイドは、実質的に互いに平行となるように配置されている請求項184乃至195のいずれか1項に記載のカートリッジ。
- 前記上流側ガイドと前記下流側ガイドは、前記係合部材を前記カップリング部材の径方向に沿うようにガイドする請求項184乃至195のいずれか1項に記載のカートリッジ。
- 凹部を有する駆動軸が設けられた電子写真画像形成装置本体に着脱可能に構成されたカートリッジであって、
(1)その表面に現像剤を担持して回転するように構成された回転体と、
(2)カップリング部材であって、(2−1)前記凹部へ進入することで前記回転体を回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)実質的に互いに平行に配置された2つのガイドを有し、前記2つのガイドによって前記係合部材をガイド可能に保持するよう構成された保持部材と、
を有するカートリッジ。 - 前記2つのガイドは、前記係合部材を前記カップリング部材の径方向に沿うようにガイドする請求項198に記載のカートリッジ。
- 凹部を有する駆動軸が設けられた電子写真画像形成装置本体に着脱可能に構成されたカートリッジであって、
(1)その表面に現像剤を担持して回転するように構成された回転体と、
(2)カップリング部材であって、(2−1)前記凹部へ進入することで前記回転体を回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)前記駆動力受け部を少なくとも前記カップリング部材の径方向における内側に向けて付勢するように構成された付勢部材と、
を有し、
前記付勢部材と前記係合部材は前記カップリング部材の径方向に沿って配置されているカートリッジ。 - 前記付勢部材は、前記係合部材を少なくとも前記カップリング部材の径方向内側に向けて付勢している請求項200に記載のカートリッジ。
- 前記係合部材の前記カップリング部材の径方向への移動を規制するための係止部を有する請求項200または201に記載のカートリッジ。
- 前記係合部材は、前記付勢部材によって前記係止部に付勢されている請求項202に記載のカートリッジ。
- 前記係合部材は前記駆動力受け部が設けられた突出部を有する請求項200乃至203のいずれか1項に記載のカートリッジ。
- 前記駆動力受け部は、前記係合部材の移動方向に対して傾斜している請求項200乃至204のいずれか1項に記載のカートリッジ。
- 前記駆動力受け部は、前記駆動力を受けることで前記駆動軸の前記凹部に向かって付勢されるように傾斜している請求項200乃至205のいずれか1項に記載のカートリッジ。
- 凹部を有する駆動軸が設けられた電子写真画像形成装置本体に着脱可能に構成されたカートリッジであって、
(1)その表面に現像剤を担持して回転するように構成された回転体と、
(2)カップリング部材であって、(2−1)前記凹部へ進入することで前記回転体を回転させるための駆動力を受けるように構成された駆動力受け部を有し、移動可能な係合部材と、(2−2)伸縮可能であって、前記係合部材を少なくとも前記カップリング部材の径方向における内側に向けて付勢するように構成された付勢部材と、を有するカップリング部材と、
を有するカートリッジ。 - 前記付勢部材は、コイルバネである請求項207に記載のカートリッジ。
- 前記付勢部材の少なくとも一部は、前記回転体の内部に配置されている請求項207または208に記載のカートリッジ。
- 電子写真画像形成装置本体に着脱可能に構成されたカートリッジであって、
(1)その表面に現像剤を担持して回転するように構成された回転体と、
(2)カップリング部材であって、(2−1)前記回転体を回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)前記係合部材をスライド可能に保持するように構成された保持部材と、(2−3)前記係合部材を付勢するように構成された付勢部材と、
を有し、
前記係合部材は、前記駆動力受け部が設けられた突出部を有するカートリッジ。 - 前記付勢部材は、前記係合部材を少なくとも前記カップリング部材の径方向内側に向けて付勢している請求項210に記載のカートリッジ。
- 前記保持部材は、前記係合部材の前記カップリング部材の径方向への移動を規制するための係止部を有する請求項210または211に記載のカートリッジ。
- 前記係合部材は、前記付勢部材によって前記係止部に付勢されている請求項212に記載のカートリッジ。
- 前記駆動力受け部は、前記係合部材の移動方向に対して傾斜している請求項210乃至213のいずれか1項に記載のカートリッジ。
- 前記駆動力受け部は、前記駆動力を受けることで少なくとも前記カップリング部材の径方向の内側に向けて付勢されるように傾斜している請求項210乃至214のいずれか1項に記載のカートリッジ。
- 前記駆動力受け部は、少なくとも前記カップリング部材の径方向における外側に面している請求項210乃至215のいずれか1項に記載のカートリッジ。
- 前記係合部材は、前記カートリッジの周方向に倣って曲がり、前記カップリング部材の径方向の内側に面している曲面を有し、
前記突出部は前記係合部材の前記曲面に対して突出している請求項210乃至216のいずれか1項に記載のカートリッジ。 - 前記係合部材の前記曲面の少なくとも一部は、前記駆動力受け部よりも前記カートリッジの回転方向における上流側に配置されている請求項217に記載のカートリッジ。
- 前記突出部は、少なくとも前記カップリング部材の径方向の内側に向けて突出している請求項210乃至218のいずれか1項に記載のカートリッジ。
- 前記保持部材は中空部を有し、
前記係合部材は、前記中空部の内部に向けて付勢されている請求項210乃至219のいずれか1項に記載のカートリッジ。 - 前記保持部材は中空部を有し、
前記駆動力受け部は、前記中空部の内部に露出している請求項210乃至220のいずれか1項に記載のカートリッジ。 - 前記係合部材の少なくとも一部は、前記回転体の内部に配置されている請求項210乃至221のいずれか1項に記載のカートリッジ。
- 前記駆動力受け部の少なくとも一部は、前記回転体の内部に配置されている請求項210乃至222のいずれか1項に記載のカートリッジ。
- 前記付勢部材は伸縮可能に構成されている請求項210乃至223のいずれか1項に記載のカートリッジ。
- 前記付勢部材は弾性部材である請求項210乃至224のいずれか1項に記載のカートリッジ。
- 前記付勢部材はコイルバネである請求項210乃至225のいずれか1項に記載のカートリッジ。
- 前記付勢部材の少なくとも一部は、前記回転体の内部に配置されている請求項210乃至226のいずれか1項に記載のカートリッジ。
- 前記カップリング部材は、前記付勢部材からの付勢力を受けて前記付勢部材を支えるための付勢部材支持部を有し、
前記付勢部材支持部の少なくとも一部が、前記回転体の内部に配置されている請求項210乃至227のいずれか1項に記載のカートリッジ。 - 前記保持部材は、前記係合部材から前記駆動力が伝達されるための被伝達部を有する請求項210乃至228のいずれか1項に記載のカートリッジ。
- 前記被伝達部は、前記駆動力が伝達された際に前記駆動力受け部を少なくとも前記カップリング部材の径方向の内側に向けて付勢するように構成されている請求項229に記載のカートリッジ。
- 前記被伝達部は、前記駆動力受け部に対して傾斜している請求項229または230に記載のカートリッジ。
- 前記被伝達部は前記係合部材をガイドするためのガイドを兼ねる請求項229乃至231のいずれか1項に記載のカートリッジ。
- 前記保持部材は、前記回転体に対して固定されている請求項210乃至232のいずれか1項に記載のカートリッジ。
- 前記保持部材は、前記係合部材をガイドするためのガイドを有する請求項210乃至233のいずれか1項に記載のカートリッジ。
- 前記ガイドは、前記回転体の回転方向において前記係合部材の上流側をガイドする請求項234に記載のカートリッジ。
- 前記ガイドは、前記回転体の回転方向において前記係合部材の下流側をガイドする請求項234に記載のカートリッジ。
- 前記ガイドは、前記回転体の回転方向において前記係合部材の上流側をガイドするための上流側ガイドと、前記回転方向において前記係合部材の下流側をガイドするための下流側ガイドと、を有する請求項234乃至236のいずれか1項に記載のカートリッジ。
- 前記上流側ガイドと前記下流側ガイドは、実質的に互いに平行となるように配置されている請求項237に記載のカートリッジ。
- 前記保持部材は、実質的に互いに平行な2つのガイドを有し、
前記2つのガイドに対して前記係合部材がガイドされる請求項210乃至238のいずれか1項に記載のカートリッジ。 - 前記カップリング部材の軸線方向において、前記駆動力受け部の内側は、前記駆動力受け部の外側よりも前記カップリング部材の回転方向における下流側に配置される請求項210乃至239のいずれか1項に記載のカートリッジ。
- 前記駆動力受け部は少なくとも前記カップリング部材の軸線方向における内側に面している請求項210乃至240のいずれか1項に記載のカートリッジ。
- 前記付勢部材は前記保持部材と別体に構成されている請求項210乃至241のいずれか1項に記載のカートリッジ。
- 前記付勢部材は前記係合部材と別体に構成されている請求項210乃至242のいずれか1項に記載のカートリッジ。
- 前記カップリング部材の径方向に沿って前記付勢部材と前記係合部材が配置されている請求項210乃至243のいずれか1項に記載のカートリッジ。
- 前記回転体は、感光体ドラムである請求項210乃至244のいずれか1項に記載のカートリッジ。
- 前記回転体は、現像ローラである請求項210乃至244のいずれか1項に記載のカートリッジ。
- 前記カートリッジは、前記現像ローラに現像剤を供給する供給ローラを有する請求項246に記載のカートリッジ。
- 前記供給ローラは、前記カップリング部材が受けた駆動力によって回転する請求項247に記載のカートリッジ。
- 前記回転体は、現像ローラに現像剤を供給するための供給ローラである請求項210乃至244のいずれか1項に記載のカートリッジ。
- 前記回転体はシャフトを有し、前記シャフトに前記カップリング部材が取り付けられている請求項210乃至249のいずれか1項に記載のカートリッジ。
- 電子写真画像形成装置本体に着脱可能に構成されたカートリッジであって、
(1)その表面に現像剤を担持して回転するように構成された回転体と、
(2)カップリング部材であって、(2−1)前記回転体を回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)前記係合部材をスライド可能に保持するように構成された保持部材と、(2−3)前記係合部材を付勢するように構成された付勢部材と、
を有し、
前記駆動力受け部は、少なくとも前記カップリング部材の径方向における内側に向けて延びているカートリッジ。 - 前記駆動力受け部は、前記係合部材の移動方向に対して傾斜している請求項251に記載のカートリッジ。
- 前記駆動力受け部は、前記駆動力を受けることで少なくとも前記径方向の内側に向けて付勢されるように傾斜している請求項251または252に記載のカートリッジ。
- 前記駆動力受け部は、少なくとも前記カップリング部材の径方向における外側に面している請求項251乃至253のいずれか1項に記載のカートリッジ。
- 電子写真画像形成装置本体に着脱可能に構成されたカートリッジであって、
(1)その表面に現像剤を担持して回転するように構成された回転体と、
(2)カップリング部材であって、前記カートリッジの軸線と垂直な断面の形状が略円形の係合部を有するカップリング部材と、
を有し、
前記係合部は、前記回転体を回転させるための駆動力を受けるように構成された駆動力受け部を有し、前記断面の半径以上の距離を移動可能であるカートリッジ。 - 前記係合部の少なくとも一部が、少なくとも前記カップリング部材の径方向における外側に面している請求項255に記載のカートリッジ。
- 前記係合部の少なくとも一部が、少なくとも前記回転体の内部に配置されている請求項255乃至256のいずれか1項に記載のカートリッジ。
- 前記係合部は、前記断面の直径以上の距離を移動可能である請求項255乃至257のいずれか1項に記載のカートリッジ。
- 電子写真画像形成装置本体に着脱可能に構成されたカートリッジであって、
(1)その表面に現像剤を担持して回転するように構成された回転体と、
(2)カップリング部材であって、前記カートリッジの軸線と垂直な断面の形状が膨らんでいる膨らみ部を有するカップリング部材と、
を有し、
前記膨らみ部は、前記回転体を回転させるための駆動力を受けるように構成された駆動力受け部を有し、前記断面の中心から表面までの距離以上を移動可能であるカートリッジ。 - 前記膨らみ部の少なくとも一部が、少なくとも前記カップリング部材の径方向における外側に面している請求項259に記載のカートリッジ。
- 前記膨らみ部は、前記断面の直径以上の距離を移動可能である請求項259又は260に記載のカートリッジ。
- 電子写真画像形成装置本体に着脱可能に構成されたカートリッジであって、
(1)その表面に現像剤を担持して回転するように構成された回転体と、
(2)カップリング部材であって、(2−1)前記回転体を回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)前記係合部材を移動可能に保持するように構成された保持部材と、
を有し、
前記保持部材は、(2−2−1)前記カートリッジの回転方向において前記係合部材の上流側をガイドする上流側ガイドと、(2−2−2)前記係合部材の下流側をガイドする下流側ガイドと、を有し、
前記駆動力受け部は、少なくとも前記カップリング部材の径方向における内側に向けて延びているカートリッジ。 - 前記付勢部材は、前記係合部材を少なくとも前記カップリング部材の径方向内側に向けて付勢している請求項262に記載のカートリッジ。
- 前記係合部材は前記駆動力受け部が設けられた突出部を有する請求項262乃至263のいずれか1項に記載のカートリッジ。
- 前記保持部材は、前記係合部材から前記駆動力が伝達されるための被伝達部を有する請求項262乃至264のいずれか1項に記載のカートリッジ。
- 前記被伝達部は、前記駆動力受け部に対して傾斜している請求項265に記載のカートリッジ。
- 前記被伝達部は前記下流側ガイドに設けられている請求項265または266に記載のカートリッジ。
- 前記上流側ガイドと前記下流側ガイドは、実質的に互いに平行となるように配置されている請求項262乃至267のいずれか1項に記載のカートリッジ。
- 前記係合部材を付勢するための前記付勢部材を有する請求項262乃至268のいずれか1項に記載のカートリッジ。
- 前記上流側ガイドと前記下流側ガイドは、前記係合部材を前記カップリング部材の径方向に沿うようにガイドする請求項262乃至269のいずれか1項に記載のカートリッジ。
- 電子写真画像形成装置本体に着脱可能に構成されたカートリッジであって、
(1)その表面に現像剤を担持して回転するように構成された回転体と、
(2)カップリング部材であって、(2−1)前記凹部へ進入することで前記回転体を回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)実質的に互いに平行に配置された2つのガイドを有し、前記2つのガイドによって前記係合部材をガイド可能に保持するよう構成された保持部材と、
を有するカートリッジ。 - 前記2つのガイドは、前記係合部材を前記カップリング部材の径方向に沿うようにガイドする請求項271に記載のカートリッジ。
- 電子写真画像形成装置本体に着脱可能に構成されたカートリッジであって、
(1)その表面に現像剤を担持して回転するように構成された回転体と、
(2)カップリング部材であって、(2−1)前記回転体を回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、(2−2)前記駆動力受け部を少なくとも前記カップリング部材の径方向における内側に向けて付勢するように構成された付勢部材と、
を有し、
前記付勢部材と前記係合部材は前記カップリング部材の径方向に沿って配置されているカートリッジ。 - 電子写真画像形成装置本体に着脱可能に構成されたカートリッジであって、
(1)その表面に現像剤を担持して回転するように構成された回転体と、
(2)カップリング部材であって、(2−1)前記回転体を回転させるための駆動力を受けるように構成された駆動力受け部を有し、移動可能な係合部材と、(2−2)伸縮可能であって、前記係合部材を少なくとも前記カップリング部材の径方向における内側に向けて付勢するように構成された付勢部材と、を有するカップリング部材と、
を有し、
前記駆動力受け部は、少なくとも前記カップリング部材の径方向における内側に向けて延びているカートリッジ。 - 請求項138乃至274のいずれか1項に記載のカートリッジと、
前記電子写真画像形成装置本体と、
を有する電子写真画像形成装置。 - 電子写真画像形成装置本体に設けられた駆動軸に対して係合および離脱可能に構成されたカップリング部材であって、
前記駆動軸に設けられた凹部に進入することで、その表面に現像剤を担持した回転体を回転させるための駆動力を受けるように構成された駆動力受け部と、
前記駆動力受け部をスライド可能に保持する保持部材と、
前記係合部材を付勢するように構成された付勢部材と、
を有するカップリング部材。 - 電子写真画像形成装置本体に設けられた駆動軸に対して係合および離脱可能に構成されたカップリング部材であって、
(1)その表面に現像剤を担持した回転体を回転させるための駆動力を受けるように構成された駆動力受け部を有する係合部材と、
(2)前記係合部材をスライド可能に保持するように構成された保持部材と、
(3)前記係合部材を付勢するように構成された付勢部材と、
を有し、
前記駆動力受け部は、少なくとも前記カップリング部材の径方向における内側に向けて延びているカップリング部材。
Priority Applications (37)
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CA3194108A CA3194108A1 (en) | 2016-08-26 | 2016-08-26 | Drum unit, cartridge, electrophotographic image forming apparatus, and coupling member |
DE112016007181.7T DE112016007181T5 (de) | 2016-08-26 | 2016-08-26 | Trommeleinheit, Kartusche, elektrofotografische Bildausbildungsvorrichtung und Kopplungselement |
CA3034218A CA3034218A1 (en) | 2016-08-26 | 2016-08-26 | Drum unit, cartridge, electrophotographic image forming apparatus, and coupling member |
EP19202685.4A EP3629092A1 (en) | 2016-08-26 | 2016-08-26 | Drum unit, cartridge, electrophotographic image forming apparatus and coupling member |
JP2018536034A JP6786607B2 (ja) | 2016-08-26 | 2016-08-26 | ドラムユニット、カートリッジおよび電子写真画像形成装置 |
KR1020217024834A KR102335685B1 (ko) | 2016-08-26 | 2016-08-26 | 드럼 유닛, 카트리지, 전자 사진 화상 형성 장치, 및 커플링 부재 |
PCT/JP2016/075735 WO2018037573A1 (ja) | 2016-08-26 | 2016-08-26 | ドラムユニット、カートリッジ、電子写真画像形成装置、およびカップリング部材 |
EP16914247.8A EP3506022B1 (en) | 2016-08-26 | 2016-08-26 | Drum unit, cartridge, electrophotographic image forming apparatus, and coupling member |
CA3080790A CA3080790C (en) | 2016-08-26 | 2016-08-26 | Drum unit, cartridge, electrophotographic image forming apparatus and coupling member |
KR1020217039268A KR102461061B1 (ko) | 2016-08-26 | 2016-08-26 | 드럼 유닛, 카트리지, 전자 사진 화상 형성 장치, 및 커플링 부재 |
CA3080773A CA3080773C (en) | 2016-08-26 | 2016-08-26 | Drum unit, cartridge, electrophotographic image forming apparatus and c oupling member |
KR1020197008470A KR102289296B1 (ko) | 2016-08-26 | 2016-08-26 | 드럼 유닛, 카트리지, 전자 사진 화상 형성 장치, 및 커플링 부재 |
CA3080824A CA3080824C (en) | 2016-08-26 | 2016-08-26 | Drum unit, cartridge, electrophotographic image forming apparatus, and coupling member |
PL16914247T PL3506022T3 (pl) | 2016-08-26 | 2016-08-26 | Zespół bębna, kaseta, urządzenie do tworzenia obrazu elektrofotograficznego i człon sprzęgający |
CN202111149202.9A CN113885302A (zh) | 2016-08-26 | 2016-08-26 | 鼓单元、盒、电子照相成像设备以及联接构件 |
RU2019108099A RU2019108099A (ru) | 2016-08-26 | 2016-08-26 | Узел барабана, картридж, устройство формирования электрофотографических изображений и муфтовый элемент |
GB1903980.9A GB2568445B (en) | 2016-08-26 | 2016-08-26 | Drum unit, cartridge, electrophotographic image forming apparatus and coupling member |
ES16914247T ES2870050T3 (es) | 2016-08-26 | 2016-08-26 | Unidad de tambor, aparato de formación de imágenes electrofotográficas y elemento de acoplamiento |
CN201680088700.8A CN109643080B (zh) | 2016-08-26 | 2016-08-26 | 鼓单元、盒、电子照相成像设备以及联接构件 |
AU2016420645A AU2016420645B2 (en) | 2016-08-26 | 2016-08-26 | Drum unit, cartridge, electrophotographic image forming apparatus, and coupling member |
MX2019002146A MX2019002146A (es) | 2016-08-26 | 2016-08-26 | Unidad de tambor, cartucho, aparato de formacion de imagenes electrofotograficas y miembro de acoplamiento. |
CA3080757A CA3080757C (en) | 2016-08-26 | 2016-08-26 | Drum unit, cartridge, electrophotographic image forming apparatus and coupling member |
SG11201901174UA SG11201901174UA (en) | 2016-08-26 | 2016-08-26 | Drum unit, cartridge, electrophotographic image forming apparatus and coupling member |
BR112019001593-0A BR112019001593B1 (pt) | 2016-08-26 | Unidade de tambor, cartucho, aparelho de formação de imagem eletrofotográfica e elemento de acoplamento | |
ZA2019/00569A ZA201900569B (en) | 2016-08-26 | 2019-01-28 | Drum unit, cartridge, electrophotographic image forming apparatus, and coupling member |
US16/275,692 US10539915B2 (en) | 2016-08-26 | 2019-02-14 | Drum unit, cartridge, electrophotographic image forming apparatus and coupling member |
CL2019000463A CL2019000463A1 (es) | 2016-08-26 | 2019-02-21 | Unidad de tambor, cartucho, aparato formador de imagen electrofotográfica y elemento de acoplamiento. |
PH12019500391A PH12019500391A1 (en) | 2016-08-26 | 2019-02-22 | Drum unit, cartridge, electrophotographic image forming apparatus and coupling member |
CONC2019/0002093A CO2019002093A2 (es) | 2016-08-26 | 2019-03-05 | Unidad de tambor, cartucho, aparato formador de imagen electrofotográfica y elemento de acoplamiento |
US16/733,560 US10824106B2 (en) | 2016-08-26 | 2020-01-03 | Drum unit, cartridge, electrophotographic image forming apparatus and coupling member |
AU2020203870A AU2020203870B2 (en) | 2016-08-26 | 2020-06-11 | Drum unit, cartridge, electrophotographic image forming apparatus, and coupling member |
US17/036,376 US11150591B2 (en) | 2016-08-26 | 2020-09-29 | Drum unit, cartridge, electrophotographic image forming apparatus and coupling member |
CL2020003258A CL2020003258A1 (es) | 2016-08-26 | 2020-12-16 | Unidad de tambor, cartucho, aparato formador de imagen electrofotográfica y elemento de acoplamiento (divisional solicitud no. 463-2019) |
CL2020003259A CL2020003259A1 (es) | 2016-08-26 | 2020-12-16 | Unidad de tambor para instalar desmontablemente en un aparato formador de imágenes electrofotográficas que cuenta con un tambor fotosensible y una unidad de acoplamiento que tiene un elemento de acoplamiento, un elemento de retención y un elemento de empuje, un cartucho y un elemento de acoplamiento. (divisional solicitud no. 463-2019) |
CL2021001319A CL2021001319A1 (es) | 2016-08-26 | 2021-05-19 | Unidad de tambor para instalar desmontablemente en un aparato formador de imágenes electrofotográficas que cuenta con un tambor fotosensible y una unidad de acoplamiento que tiene un elemento de acoplamiento, un elemento de retención y un elemento de empuje, un cartucho y un elemento de acoplamiento. (divisional solicitud no. 463-2019) |
US17/372,635 US11733636B2 (en) | 2016-08-26 | 2021-07-12 | Drum unit, cartridge, electrophotographic image forming apparatus and coupling member |
AU2022202626A AU2022202626B2 (en) | 2016-08-26 | 2022-04-20 | Drum unit, cartridge, electrophotographic image forming apparatus and coupling member |
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