WO2018169096A1 - ドラムユニット、カートリッジ、プロセスカートリッジおよび電子写真画像形成装置 - Google Patents

ドラムユニット、カートリッジ、プロセスカートリッジおよび電子写真画像形成装置 Download PDF

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Publication number
WO2018169096A1
WO2018169096A1 PCT/JP2018/011561 JP2018011561W WO2018169096A1 WO 2018169096 A1 WO2018169096 A1 WO 2018169096A1 JP 2018011561 W JP2018011561 W JP 2018011561W WO 2018169096 A1 WO2018169096 A1 WO 2018169096A1
Authority
WO
WIPO (PCT)
Prior art keywords
moving member
driving force
cartridge according
shaft
drum unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/011561
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
阿部　大輔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to EP18767736.4A priority Critical patent/EP3598237B1/en
Priority to CN201880017788.3A priority patent/CN110419007A/zh
Publication of WO2018169096A1 publication Critical patent/WO2018169096A1/ja
Priority to US16/568,928 priority patent/US10921749B2/en
Anticipated expiration legal-status Critical
Priority to US17/152,879 priority patent/US11327435B2/en
Priority to US17/712,261 priority patent/US11573525B2/en
Priority to US18/089,751 priority patent/US11774906B2/en
Priority to US18/232,939 priority patent/US12130582B2/en
Priority to US18/739,468 priority patent/US12298705B2/en
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • 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
    • G03G21/186—Axial couplings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D1/108—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
    • F16D1/112—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling the interengaging parts comprising torque-transmitting surfaces, e.g. bayonet joints
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • 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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1651—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for connecting the different parts
    • G03G2221/1657—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for connecting the different parts transmitting mechanical drive power

Definitions

  • the present invention relates to an electrophotographic image forming apparatus for electrophotographic image formation, a cartridge, a process cartridge, and a drum unit.
  • an electrophotographic image forming apparatus elements such as a photosensitive drum and a developing roller as a rotating body involved in image formation are integrated as a cartridge and can be detachably attached to an image forming apparatus main body (hereinafter, apparatus main body).
  • apparatus main body an image forming apparatus main body
  • the coupling member on the cartridge side is engaged with a driving force transmitting portion such as a driving pin on the apparatus main body side to transmit the driving force.
  • Japanese Patent Application Laid-Open No. 2008-233867 discloses a configuration in which a coupling member provided at an end portion of a photosensitive drum is advanced and retracted in the rotational axis direction of the photosensitive drum.
  • the coupling member provided in the cartridge engages and disengages with the drive pin provided in the apparatus main body.
  • the rotational driving force of the apparatus main body is transmitted to the cartridge.
  • a representative configuration disclosed in the present application is In the process cartridge (1) Photosensitive drum, (2) A frame for rotatably supporting the photosensitive drum; (3) A flange provided at an end of the photosensitive drum to transmit a driving force to the photosensitive drum; (4) A coupling member provided on the flange, (4-1) (a) an advanced position where the photosensitive drum is advanced away from the photosensitive drum, and (b) a retracted position for approaching the photosensitive drum A movable member movable with respect to the flange between positions, a moving member including a driving force receiving portion for receiving the driving force, and (4-2) transmitting the driving force from the moving member to the flange A connecting member connected to the flange to obtain a coupling member;
  • the connecting member is (4-2-1) A shaft portion extending along the moving direction of the moving member, (4-2-2) A restricting portion which prevents the moving member at the advanced position from coming off the flange; Equipped with The restricting portion is a process cartridge that receives the driving force from the moving member by engaging
  • Photosensitive drum (2) A frame for rotatably supporting the photosensitive drum; (3) a flange provided at an end of the photosensitive drum; (4) A coupling member provided on the flange for receiving a driving force for rotating the photosensitive drum, (4-1) (a) an advanced position advanced out of the photosensitive drum (B) a movable member movable with respect to the flange between a retracted position retracted to approach the photosensitive drum and a driving force receiving portion for receiving the driving force; 2) A coupling member having a connecting member connected to the flange so as to transmit the driving force from the moving member to the flange.
  • the connecting member is (4-2-1) A shaft portion extending along the moving direction of the moving member, (4-2-2) An enlarged portion provided on the tip end side of the shaft portion and having a maximum rotation radius larger than the maximum rotation radius of the shaft portion, the moving member by engaging with the moving member An enlargement unit receiving the driving force from the Process cartridge.
  • the connecting member is (4-2-1) A shaft portion extending along the moving direction of the moving member, (4-2-2) An enlarged portion provided on the tip end side of the shaft portion and having a maximum rotation radius larger than the maximum rotation radius of the shaft portion, the moving member by engaging with the moving member An enlargement unit receiving the driving force from the Cart
  • a rotatable body that can rotate with toner carried on its surface (2) A frame for rotatably supporting the rotating body, (3) a transmission member for transmitting a driving force to the rotating body; (4) A coupling member provided on the transmission member, (4-1) (a) an advanced position advanced to the outside of the cartridge, and (b) retracted to the inside of the cartridge A movable member movable with respect to the transmission member between a retracted position, and a drive force receiving portion for receiving the drive force; (4-2) the drive from the movement member to the transmission member A coupling member connected to the transmission member so as to be able to transmit a force;
  • the connecting member is (4-2-1) A shaft portion extending along the moving direction of the moving member, (4-2-2) An enlarged portion provided on the tip end side of the shaft portion and having a maximum rotation radius larger than the maximum rotation radius of the shaft portion, the moving member by engaging with the moving member An enlargement unit receiving the driving force from the Cartridge.
  • FIG. 1 A representative configuration disclosed in the present application is In the drum unit (1) Photosensitive drum, (2) A flange provided at an end of the photosensitive drum to transmit a driving force to the photosensitive drum; (3) A coupling member provided on the flange, (3-1) (a) an advanced position where the photosensitive drum is advanced away from the photosensitive drum, and (b) retracted toward the inside of the photosensitive drum
  • the movable member is movable with respect to the flange between the retracted positions, and a moving member including a driving force receiving portion for receiving the driving force, and (3-2) transmitting the driving force from the moving member to the flange
  • the connecting member is (3-2-1) A shaft portion extending along the moving direction of the moving member, (3-2-2) A restricting portion which prevents the moving member at the advanced position from coming off the flange; Equipped with The restricting portion is a drum unit that receives the driving force from the moving member by engaging with the moving member.
  • the representative configuration disclosed in the present application is In the drum unit (1) Photosensitive drum, (2) A flange provided at an end of the photosensitive drum to transmit a driving force to the photosensitive drum; (3) A coupling member provided on the flange, (3-1) (a) an advanced position where the photosensitive drum is advanced away from the photosensitive drum, and (b) retracted toward the inside of the photosensitive drum
  • the movable member is movable with respect to the flange between the retracted positions, and a moving member including a driving force receiving portion for receiving the driving force, and (3-2) transmitting the driving force from the moving member to the flange
  • the connecting member is (3-2-1) A shaft portion extending along the moving direction of the moving member, (3-2-2) An enlarged portion provided on the tip side of the shaft portion and having a maximum rotation radius larger than the maximum rotation radius of the shaft portion, and the moving member by engaging with the moving member
  • drum unit which is detachable from the electrophotographic image forming apparatus main body, With a photosensitive drum, A flange provided at an end of the photosensitive drum to transmit a driving force to the photosensitive drum; A free end having a driving force receiving portion for receiving the driving force from the apparatus body, and a maximum turning radius disposed closer to the flange than the free end and smaller than a maximum turning radius of the free end
  • a movable member having a small diameter portion, the movable member being movable relative to the flange between a transmitting position capable of transmitting the driving force to the flange and a non-transmitting position not transmitting the driving force to the flange Moving members,
  • It is a drum unit by which a controlled part by which movement of the moving member is restricted in a direction away from the flange is provided on at least a part of the free end of the moving member and the small diameter portion.
  • drum unit which is detachable from the electrophotographic image forming apparatus main body, With a photosensitive drum, A shaft provided at an end of the photosensitive drum for transmitting a driving force to the photosensitive drum; A moving member for receiving the driving force from the device body and transmitting the driving force to the shaft, wherein the transmitting position to which the driving force can be transmitted to the shaft, and the non-transmission not transmitting the driving force to the shaft A movable member movable relative to the axis between positions; A first biasing member for biasing the moving member from the non-transmission position toward the transmission position; A second biasing member for biasing the moving member from the transmission position toward the non-transmission position; A drum unit having
  • FIG. 1 is a cross-sectional view of the image forming apparatus.
  • FIG. 2 is a cross-sectional view of the cartridge.
  • FIG. 3 is a perspective view when the cartridge is disassembled.
  • FIG. 4 (a) and (b) are explanatory drawings for explaining how the cartridge is mounted and removed.
  • FIG. 5 is a perspective view of the cartridge.
  • (B) is a perspective view explaining the internal mechanism of a cartridge.
  • FIG. 6 (a) and (b) are perspective views for explaining the operation of the cartridge.
  • FIG. 7 is a perspective view for explaining the coupling unit.
  • FIG. 8 (a) and (b) are side views for explaining the operation when the opening and closing door of the image forming apparatus is opened and closed.
  • FIG. 9 (a), (b) is a perspective view explaining the internal mechanism of a coupling unit.
  • FIG. 10 is a perspective view for explaining the internal mechanism of the coupling unit.
  • FIG. 11 (a), (b) is a perspective view explaining a coupling structure.
  • FIG. 12 (a), (b) is an explanatory view of a coupling.
  • FIG. 13 (a), (b) is an explanatory view of the coupling.
  • FIG. 14 (a), (b) is a perspective view explaining the internal mechanism of a coupling unit.
  • FIG. 15 (a), (b) is a perspective view explaining the internal mechanism of a coupling unit.
  • FIG. 16 is a perspective view for explaining the support structure of the coupling unit.
  • FIG. 17 (a) and (b) are cross-sectional views for explaining the internal mechanism of the coupling unit.
  • FIG. 18 (a) and (b) are enlarged views of FIG.
  • FIG. 19 (a), (b) and (c) are explanatory diagrams of the cartridge operation.
  • FIG. 20 is a perspective view for explaining the relationship between the coupling and the drive shaft of the apparatus main body.
  • FIG. 21 (a) to (f) are explanatory diagrams for explaining how the cartridge is removed.
  • an image forming apparatus an image forming apparatus for forming an electrophotographic image
  • the electrophotographic method refers to a method of developing an electrostatic image formed on a photosensitive member with toner.
  • the developing method is not related to developing methods such as a one-component developing method, a two-component developing method, and a dry developing method.
  • the electrophotographic photosensitive drum is used in an image forming apparatus of an electrophotographic method, and refers to a configuration in which a photosensitive member (photosensitive layer) is provided on a cylinder surface layer of a drum shape.
  • the charging roller, the developing roller and the like involved in the image formation acting on the photosensitive drum will be referred to as process means.
  • a cartridge provided with a photosensitive member or process means (cleaning blade, developing roller, etc.) involved in image formation is called a process cartridge.
  • a process cartridge in which a photosensitive drum, a charging roller, a developing roller, and a cleaning blade are integrated will be described as an example.
  • a laser beam printer will be described as an example among electrophotographic methods used in a wide range of applications such as multifunction machines, fax machines, and printers.
  • the reference numerals in the embodiments are for referring to the drawings and do not limit the configuration. Further, the dimensions and the like in the embodiments are for the purpose of clearly describing the relationship, and do not limit the configuration.
  • the longitudinal direction of the process cartridge in the embodiment is a direction substantially perpendicular to the direction in which the process cartridge is attached to and detached from the electrophotographic image forming apparatus main body. Further, the longitudinal direction of the process cartridge is parallel to the rotation axis of the electrophotographic photosensitive drum (in a direction intersecting the sheet conveying direction). In the longitudinal direction, the side on which the photosensitive drum receives rotational force from the image forming apparatus main body of the process cartridge is a driving side (a driven side), and the opposite side is a non-driving side. Further, when stated as upper (upper) without specifying otherwise, the upper side in the direction of gravity when the image forming apparatus is installed is regarded as the upper side, and the opposite direction (reverse direction) is the lower side in the direction of gravity (lower And).
  • the cartridge in the present embodiment is a process cartridge in which a photosensitive drum as a photosensitive member (image carrier / rotary member), a developing roller as a process unit, a charging roller, and a cleaning blade are integrated.
  • the cartridge is removable (removable) from the apparatus main body.
  • a gear, a photosensitive drum, a flange, a developing roller, and the like are provided in the cartridge as a rotating body / rotating member that rotates by receiving rotational force from the apparatus main body.
  • FIG. 1 is a cross-sectional view of a laser beam printer main body A (hereinafter, referred to as an apparatus main body A) and a process cartridge (hereinafter, referred to as a cartridge B) which are electrophotographic image forming apparatuses.
  • 2 is a cross-sectional view of the cartridge B.
  • the apparatus main body A refers to a portion of the laser beam printer which is an electrophotographic image forming apparatus excluding the removable cartridge B.
  • the electrophotographic image forming apparatus shown in FIG. 1 is a laser beam printer using an electrophotographic technology in which the cartridge B is attachable to and detachable from the apparatus main body A.
  • the cartridge B is disposed below the laser scanner unit 3 as an exposure unit (exposure unit).
  • a sheet tray 4 accommodating a sheet P as a recording medium (sheet material) which is an object (object) for forming an image by the image forming apparatus is disposed.
  • the fixing device 9 as a fixing means is constituted by a heating roller 9a and a pressure roller 9b.
  • the drum cylinder 62 as a photosensitive drum which can carry and rotate a developer is rotationally driven at a predetermined circumferential speed (process speed) in the direction of arrow R (hereinafter referred to as rotational direction R). .
  • the charging roller 66 to which the bias voltage is applied contacts the outer peripheral surface of the drum cylinder 62, and uniformly charges the outer peripheral surface of the drum cylinder 62 uniformly.
  • the laser scanner unit 3 as an exposure unit outputs a laser beam L according to the image information input to the laser printer.
  • the laser beam L passes through the exposure window 74 on the upper surface of the cartridge B and scans and exposes the outer peripheral surface of the drum cylinder 62.
  • a part of the charged drum cylinder 62 is destaticized to form an electrostatic image (electrostatic latent image) on the surface of the drum cylinder.
  • the developer in the toner chamber 29 (hereinafter referred to as "toner T") is stirred and transported by the rotation of the transport sheet 43 as the transport member. And sent to the toner supply chamber 28.
  • the toner T as the developer is carried on the surface of the developing roller 32 as the developing means (process means and rotating body) by the magnetic force of the magnet roller 34 (fixed magnet).
  • the developing roller 32 functions as a toner carrier (developer carrier, developing member) for carrying and transporting the developer to the developing area in order to develop the electrostatic image formed on the drum cylinder 62.
  • the layer thickness of the circumferential surface of the developing roller 32 is regulated by the developing blade 42 for the toner T conveyed to the developing region.
  • the toner T is frictionally charged between the developing roller 32 and the developing blade 42.
  • the drum cylinder 62 is a rotating body that carries the toner image (image by toner) developed by the developing roller 32 on the surface thereof and rotates in the rotation direction R.
  • the drum cylinder 62 is an image carrier that carries a toner image.
  • the sheet P stored in the lower part of the apparatus main body A by the pickup roller 5a, the pair of feed rollers 5b, and the pair of transport rollers 5c is aligned with the output timing of the laser light L. Are fed from
  • the sheet P is supplied to the transfer position (transfer nip) between the drum cylinder 62 and the transfer roller 7 via the transfer guide 6.
  • the toner image is sequentially transferred from the drum cylinder 62 as an image carrier to the sheet P as a recording medium.
  • the sheet P on which the toner image has been transferred is separated from the drum cylinder 62 and conveyed to the fixing device 9 along the conveyance guide 8. Then, the sheet P passes through the fixing nip portion of the heating roller 9 a and the pressure roller 9 b which constitute the fixing device 9. In the fixing nip portion, the unfixed toner image on the sheet P is fixed while being pressed and heated. Thereafter, the sheet P on which the toner image is fixed is conveyed by the discharge roller pair 10 and discharged to the discharge tray 11.
  • transfer residual toner remaining on the drum surface without being transferred to the sheet adheres to the surface of the drum cylinder 62 after the toner T is transferred to the sheet.
  • the transfer residual toner is removed by the cleaning blade 77 in contact with the circumferential surface of the drum cylinder 62.
  • the toner remaining on the drum cylinder 62 is cleaned, and the cleaned drum cylinder 62 is charged again and used for the image forming process.
  • the toner (transfer residual toner) removed from the drum cylinder 62 is stored in the waste toner chamber 71 b of the cleaning unit 60.
  • the charging roller 66, the developing roller 32, and the cleaning blade 77 all function as a process unit that acts on the drum cylinder 62.
  • the image forming apparatus of this embodiment adopts the method of removing the transfer residual toner by the cleaning blade 77, but adopts the method (cleanerless method) of collecting the transfer residual toner whose charge is adjusted simultaneously with the development by the developing device. It is also good.
  • an auxiliary charging member (such as an auxiliary charging brush) for adjusting the charge of the transfer residual toner also functions as a process means. (Description of the configuration of the process cartridge)
  • FIG. 3 is an exploded perspective view of the cartridge B.
  • the cartridge B has a frame (casing) which rotatably supports the drum cylinder 62 and the developing roller 32.
  • the frame of the cartridge B can be disassembled into a plurality of units.
  • the cartridge B of this embodiment is an integrated unit of the cleaning unit 60 and the developing unit 20, and the frame of the cleaning unit 60 and the frame of the developing unit 20 are provided in the cartridge B. .
  • the cleaning unit 60 for holding the drum cylinder 62 and the developing unit 20 for holding the developing roller 32 will be described using a configuration in which they are connected by two connecting pins 75. It may be divided into the above units. Naturally, the plurality of units may not be coupled by a coupling member such as a pin, and only a part of the units may be replaced.
  • the cleaning unit 60 includes a cleaning frame 71, a drum unit U1, a charging roller 66, a cleaning blade 77, and the like.
  • the drum unit U1 has a drum cylinder unit U2 and a coupling unit U3 provided at the drive end of the drum cylinder unit U2.
  • the drum cylinder unit U2 is configured by combining the drum cylinder 62 and the non-driving side flange.
  • the coupling unit U3 is for receiving a rotational force for rotating the drum unit U1 from the outside of the drum unit U1.
  • the coupling unit U3 includes a drive side flange 87 as a flange member and a movable coupling member (moving member, advancing and retracting member, engaging member) 86.
  • the drive side flange 87 is attached to the drive side of the drum cylinder 62.
  • the coupling unit U3 is attached to the drum cylinder 62.
  • the moving member 86 receives rotational driving force from the apparatus main body A.
  • the moving member 86 drives the drive side flange 87.
  • the drive side flange 87 drives the drum cylinder 62.
  • the drum cylinder 62 is rotatable about a rotational axis L1 (hereinafter, referred to as an axis L1).
  • the moving member 86 is rotatable around a rotation axis L2 (hereinafter referred to as an axis L2).
  • the moving member 86 is connected to the end of the drum cylinder 62 such that the axis L1 of the drum cylinder 62 and the axis L2 of the moving member 86 are substantially coaxial. Therefore, in the following description, the axis L1 and the axis L2 may be described as the same.
  • the direction toward the drive side is referred to as the longitudinal outer side LO, and the direction toward the non-drive side as the longitudinal inner side LI.
  • the moving member 86 is configured to be able to advance and retract along the axis L2 with respect to the drum cylinder 62 and the driving side flange 87.
  • the moving member 86 is movable substantially parallel to at least the direction in which the axis (L2) extends (axial direction).
  • the moving member 86 is retracted to a position (projected position, an advanced position, a first position) advanced (projected) toward the outside of the drive side flange 87 and to the inside (drum cylinder side) of the drive side flange 87
  • the position (retracted position, second position) can be taken. That is, the moving member 86 can reciprocate along the axial direction (parallel to the rotation axis L1 of the drum cylinder 62) between the projecting position and the retracted position. Details will be described later.
  • the developing unit 20 includes the toner storage container 22, the bottom member 21, the first side member 26 L (non-driving side), the second side member 26 R (driving side), and the developing blade 42. , Developing roller 32 and magnet roller 34.
  • the toner storage container 22 includes a transport sheet 43 (stirring sheet) as a transport member for transporting the toner, and a toner T as a developer.
  • the developing unit 20 includes a compression spring 46 which applies a biasing force to regulate the posture of the unit between the developing unit 20 and the cleaning unit 60.
  • the cleaning unit 60 and the developing unit 20 are rotatably connected to each other by a connecting pin 75 as a connecting member, and the cartridge B is configured.
  • pivoting holes 23bL and 23bR are provided at the ends of the arm portions 23aL and 23aR provided at both ends in the longitudinal direction (axial direction of the developing roller 32) of the developing unit 20.
  • the pivot holes 23bL and 23bR are provided in parallel with the axis of the developing roller 32.
  • connection pin 75 for inserting the connection pins 75 are formed. Then, the arm portions 23aL and 23aR are aligned with the predetermined position of the cleaning frame 71, and the connection pin 75 is inserted into the rotation holes 23bL and 23bR and the insertion hole 71a. Thus, the cleaning unit 60 and the developing unit 20 are rotatably coupled about the connection pin 75 as a connection member.
  • the compression spring 46 attached to the roots of the arm portions 23aL and 23aR contacts the cleaning frame 71, and biases the developing unit 20 to the cleaning unit 60 with the connection pin 75 as a rotation center.
  • the developing roller 32 as the process means is reliably pressed in the direction of the drum cylinder 62 as the rotating body.
  • the developing roller 32 is maintained at a predetermined distance from the drum cylinder 62 by a spacer (not shown) as a ring-shaped interval holding member attached to both ends of the developing roller 32.
  • FIG. 4 is an explanatory diagram of how the cartridge B is attached to and detached from the apparatus main body A.
  • FIG. 4A is a perspective view seen from the non-driving side
  • FIG. 4B is a perspective view seen from the driving side.
  • the driving side refers to the end in the longitudinal direction where the moving member 86 of the cartridge B is provided.
  • FIG. 4 is a view showing the apparatus main body A with the open / close door 13 opened.
  • the apparatus main body A is provided with an opening O1, and the inside of the apparatus main body A is a mounting space for the cartridge B. Inside the apparatus main body A, a drive shaft 110 (drive transmission member) and a guide member 12 as a guide mechanism are provided.
  • the drive shaft 110 is provided on the side of the apparatus main body A, is a drive transmission mechanism on the main body side that transmits the driving force to the cartridge B mounted on the apparatus main body A, and engages with the moving member 86 of the cartridge B.
  • the rotational force can be transmitted to the cartridge B by rotation of the drive shaft 110 after the engagement.
  • the drive shaft 110 is supported by the apparatus main body A so as to be rotatable around the axis L4.
  • the drive shaft 110 also includes a drive application unit 110b as an application unit for applying a rotational force (see FIG. 20).
  • a guide member 12 as a guide mechanism is a main body side guide member for guiding the cartridge B into the apparatus main body A.
  • the guide member 12 may be a plate-like member provided with a guide groove. Further, the upper end of the guide member 12 may be brought into contact with the lower surface of the cartridge B to guide the mounting and dismounting of the cartridge B while supporting the cartridge B from below.
  • FIG. 5 is a perspective view of a cartridge B showing an embodiment of the present invention.
  • FIG. 5A is an overall view of the cartridge B.
  • FIG. FIG. 5 (b) is a view for explaining a mechanism for operating the moving member 86.
  • the cartridge B is composed of a developing unit 20 and a cleaning unit 60.
  • the cleaning unit 60 includes a cleaning frame 71. The following are disposed on the side surface of the cleaning frame 71.
  • a coupling unit U3 including a moving member 86; a bearing 100 rotatably supporting the drum unit U1; and a regulating member 101 fixed to the bearing 100 to regulate movement of the coupling unit U3 to the longitudinally outer side LO .
  • the developing unit 20 includes a toner storage frame 22 containing toner therein.
  • the second side member 26 ⁇ / b> R is provided on the side surface of the toner storage frame 22.
  • a first lever 102 and a cover 105 are provided on the side surface of the second side member 26R.
  • FIG. 5B is an exploded perspective view when the regulating member 101 and the cover 105 are removed.
  • the restriction member 101 is fixed to the bearing 100 with a screw 107.
  • the end face 101a of the regulating member 101 can be in contact with an end face 92a of a rotating cam 92 described later with reference to FIG. 9, and regulates movement of the rotating cam 92 to the longitudinally outer side LO.
  • the second side member 26R is provided with a protrusion 26R1, a protrusion 26R2, and a protrusion 26R3 on the side surface.
  • a first lever 102, a second lever 103, a gear 104, a cover 105, a spring 106 as an urging member or an elastic member, and a screw 108 are attached to the second side member 26R.
  • FIG. 6A shows a state in which the moving member 86 is retracted toward the longitudinally inner side LI (a retracted position or a driving force non-transmission position).
  • FIG. 6 (b) shows a state in which the moving member 86 protrudes toward the longitudinal outer side LO (advanced position, protruding position or driving force transmitting position).
  • the first lever 102 has a groove 102a, a rack 102b in which gear teeth are formed, and an end face 102c.
  • the groove 102a of the first lever 102 is slidably supported by the projection 26R2 of the second side member 26R.
  • the second lever 103 has a groove 103a, a rack 103b in which gear teeth are formed, an end face 103c, and a cylindrical portion 103d (see also FIG. 5B).
  • the groove 103a of the second lever 103 is slidably supported by the protrusion 26R3 of the second side member 26R.
  • the gear 104 is rotatably supported by a protrusion 26R1 of the second side member 26R.
  • the gear 104 meshes with the rack 102 b of the first lever 102 and the rack 103 b of the second lever 103.
  • the spring 106 is provided between the end face 26R4 of the second side member 26R and the end face 103c of the second lever 103.
  • the spring 106 as a biasing member or an elastic member biases the second lever 103 in the direction to move it to the cleaning unit 60 side.
  • the spring 106 is a compression spring.
  • the spring 106 acts to move the second lever 103 to the cleaning unit 60 side.
  • the cylindrical portion 103 d of the second lever 103 engages with an engaging portion 92 f of the rotation cam 92 described later with reference to FIG. 9.
  • the rotating cam 92 is configured to rotate with the movement of the second lever 103.
  • FIG. 7 is an enlarged view of the coupling unit U3 and the bearing 100. As shown in FIG.
  • the bearing 100 accommodates and supports the coupling unit U3. That is, the bearing 100 rotatably supports the drum cylinder via the coupling unit U3 (drive side drum flange 87).
  • the bearing 100 has a protrusion 100 a and a protrusion 100 b around the moving member 86.
  • the protrusion 100 a and the protrusion 100 b are used for positioning with respect to the apparatus main body A.
  • FIG. 8 is a view for explaining the operation for advancing and retracting the moving member 86.
  • FIG. 8 shows the cartridge B and the opening / closing door 13 of the apparatus main body A.
  • the open / close door 13 is rotatable around a rotation shaft 13a.
  • the open / close door 13 has an engagement portion 13 b that engages with the first lever 102.
  • FIG. 8A shows a state in which the cartridge B is inserted into the apparatus main body A by the user and held by the guide member 12 or the like of the apparatus main body A described above.
  • the open / close door 13 of the apparatus main body A is in an open state.
  • FIG. 8B shows a state in which the open / close door 13 is closed.
  • the open / close door 13 rotates in a direction approaching the cartridge B about the rotation shaft 13a. While the open / close door 13 is in a closed state, the end face 102c of the first lever 102 of the cartridge B is pressed by the engagement portion 13b of the open / close door 13 of the apparatus main body A. When the first lever 102 is pressed, the moving member 86 protrudes toward the longitudinal outer side LO.
  • FIGS. 9A and 9B are exploded perspective views of the coupling unit U3. Longitudinal outside is LO, longitudinal inside is LI.
  • the coupling unit U3 includes a coupling shaft 90, a coupling spring 91, a moving member 86, a rotating cam 92, a linear cam 93, a linear cam pressing spring 95, a driving side flange 87, a screw spring 94, and a fixing screw 96. Ru. Although the details will be described later, the coupling shaft 90 and the moving member (moving coupling member 86) are collectively referred to as a coupling member.
  • the coupling shaft 90 is provided on the drive side flange 87.
  • the coupling shaft 90 is fixed to the drive side flange 87 using a fixing screw 96.
  • the coupling shaft 90 is provided coaxially with the rotation axis L1 of the drum cylinder 62. More specifically, the fixing screw 96 passes through the hole 87 a of the drive side flange 87, is inserted into the hole 90 a 1 of the coupling shaft 90, and is fixed by a screw.
  • the coupling shaft 90 has a distal end portion 90b as a restricting portion (retaining portion) at the longitudinally outer side LO (longitudinal outer end portion) and a shaft portion (column portion) 90a at the longitudinally inner side LI.
  • the tip portion 90b has a diameter relatively larger than that of the shaft portion 90a.
  • the longitudinal inner side LI of the tip end portion 90b has an engaging portion 90b1 as a drive transmission portion formed of a plurality of concavities and convexities.
  • An end face 90b2 is provided radially inward of the engaging portion 90b1 (an enlarged view is shown in FIG. 10).
  • the moving member 86 has a projection 86 a (driving force receiving portion) which protrudes in the direction of the rotation axis L 2 and toward the longitudinal outer side LO.
  • the moving member 86 has two protrusions 86a.
  • the two protrusions 86a are disposed at positions symmetrical to each other with respect to the axis L2.
  • the protrusion 86a protrudes from the base 86b.
  • An axis 86s, an axis 86d, and a substantially elliptical cylinder 86e are connected in this order from the base 86b toward the longitudinally inner side LI.
  • the moving member 86 has an engaging portion 86f as a driving force transmitting portion including a through hole 86c and a plurality of concavo-convex portions at the center of the rotation axis L2. (The enlarged view is shown in FIG. 11 (a).)
  • the engaging portion 86f is radially inward of the base 86b and adjacent to the longitudinal outer side LO of the through hole 86c.
  • the coupling shaft 90 is inserted into the through hole 86 c of the moving member 86. In other words, the coupling shaft 90b passes through the moving member 86 (small diameter portion 86y).
  • the coupling spring 91 is attached around the shaft portion 90 a of the coupling shaft 90, and is disposed between the end surface 90 b 2 of the tip portion 90 b as a restricting portion of the coupling shaft 90 and the moving member 86.
  • the coupling spring 91 is disposed at the free end 86 x of the moving member 86.
  • the coupling spring 91 may be provided on at least a part of the free end 86x and the small diameter portion 86y of the moving member 86. However, when provided at the free end 86x, the degree of freedom in design of the coupling spring 91 is increased.
  • the engaging portion 90b1 as a driving force receiving portion of the coupling shaft 90 and the engaging portion 86f as a driving force transmitting portion of the moving member 86 are configured to be engageable and disengageable. As a result, the driving force is transmitted or blocked between the moving member 86 and the coupling shaft 90.
  • the engaging portion 90b1 functions as a restricting portion
  • the engaging portion 86f functions as a controlled portion.
  • the coupling shaft 90 can restrict the movement of the moving member 86 by the contact between the restricting portion (engaging portion 90b1) and the controlled portion (engaging portion 86f). That is, the movement of the moving member 86 in the direction away from the drive side flange 87 (or the drum cylinder 62) can be restricted.
  • the engagement portion 86f serves as the drive transmission portion and the regulated portion
  • the engagement portion 90b1 serves as the drive force receiving portion and the regulation portion.
  • these functions may be separated. It is to be noted that the function as well as the present embodiment is superior to the configuration not combining the function in terms of downsizing and rigidity.
  • the engaging portion 86 f of this embodiment is disposed outside the small diameter portion 86 y in the rotational radius direction of the moving member 86.
  • the engaging portion 86 f is provided at the free end 86 x of the moving member 86.
  • the engaging portion 86 f may be provided across the free end 86 x of the moving member 86 and the connecting portion 86 y, or may be provided only at the connecting portion 86 y of the moving member 86. That is, the engaging portion 86 f may be provided on at least a part of the free end 86 x of the moving member 86 and the connecting portion 86 y.
  • providing the engaging portion 86 f only at the free end 86 x of the moving member 86 improves the design freedom and the reliability of the drive transmission / cutoff.
  • the rotating cam 92 is provided to surround the moving member 86.
  • the longitudinal outer side LO of the rotating cam 92 has an end face 92 a.
  • the longitudinal inner side LI of the rotating cam 92 has an end face 92b provided with the cam 92e, and a cylindrical part 92c provided with a through hole 92d at the center.
  • the linear motion cam 93 has a cylinder 93a, a hole 93j, an outer end face 93b, a hole 93c, a cam 93d, a hole 93e, a shaft 93f, an inner end face 93g, a wall 93h, and a hole 93i.
  • a hole 93j is provided at the center of the cylindrical portion 93a.
  • the cam 93d protrudes from the outer end surface 93b to the longitudinally outer side LO.
  • a hole 93c is disposed around the cylindrical portion 93a. Holes 93e are provided at least on the outer end face 93b. The holes 93 e may penetrate.
  • the shaft 93f and the wall 93h are disposed to project from the inner end surface 93g to the longitudinal inner LI.
  • the longitudinal inner side LI of the linear motion cam 93 is provided with a hole 93i.
  • the shaft portion 90a of the coupling shaft 90 is accommodated in the hole 93i.
  • the shaft 86 d of the moving member 86 is accommodated in the hole 93 j.
  • the cylindrical portion 92c of the rotary cam 92 is accommodated in the hole 93c.
  • the cam 93 d of the linear motion cam 93 and the end face 92 b including the inclined surface 92 e of the rotating cam 92 are configured to abut on each other.
  • the screw spring 94 has a hole 94a, an arm 94b and an arm 94c.
  • the screw spring 94 is held by the shaft 93f by inserting the hole 94a of the screw spring 94 into the shaft 93f.
  • the arm 94 c abuts on the radially inner surface of a wall 93 h provided on the linear motion cam 93.
  • the arm 94 b abuts on a substantially elliptical cylinder 86 e provided on the moving member 86.
  • two cams 93d, two holes 93e, two shafts 93f, and two walls 93h are provided.
  • the drive side flange 87 has a hole 87a in the longitudinal inner LI.
  • the drive side flange 87 has a gear 87b, a hole 87c and an end face 87d at the longitudinal outer side LO.
  • the linear cam pressing spring 95 as the biasing member or the elastic member is accommodated in the hole 87 c of the drive side flange 87.
  • the linear cam pressing spring 95 contacts the end face 87 d of the drive side flange 87 at the inner side LI, and contacts the end face 93 g of the linear cam 93 at the outer side LO.
  • FIG. 10 is an enlarged perspective view of the coupling shaft 90 and the coupling spring 91 as a biasing member or an elastic member. It is for demonstrating the front-end
  • FIG. 10 is an enlarged perspective view of the coupling shaft 90 and the coupling spring 91 as a biasing member or an elastic member. It is for demonstrating the front-end
  • An engaging portion 90 b 1 as a driving force receiving portion (intermediate driving force receiving portion, engaging portion) composed of a plurality of concavities and convexities is provided at a tip portion 90 b as a controlled portion of the coupling shaft 90.
  • the coupling shaft 90 has a shaft portion 90a on the longer inner side LI than the tip portion 90b.
  • An arbitrary convex portion of the tip portion 90b has a surface 90b3 on one side in the circumferential direction and a surface 90b4 on the opposite side in the circumferential direction.
  • the surface 90b3 is a drive transmission surface (shaft side driving force receiving portion or flange side driving force receiving portion).
  • a coupling spring 91 is provided around the shaft 90a.
  • the end surface 91a of the coupling spring 91 abuts on the end surface 90b2 of the tip end portion 90b in the assembled state.
  • FIG. 12 (a) is a view from the side of the protrusion 86a
  • FIG. 12 (b) is a cross section taken along the line A-A of FIG. 12 (a)
  • FIG. b) is the figure seen from the cylinder 86e side.
  • the moving member 86 has two protrusions 86a.
  • the protrusion 86a has a surface 86g as a driving force receiving portion on one end side in the circumferential direction and a surface 86t on the other end side in the circumferential direction.
  • the surface 86g and the surface 86t are preferably slopes.
  • a tip surface 86i is provided at the tip of the projection 86a.
  • the moving member 86 has an engaging portion 86 f as a driving force transmitting portion composed of a plurality of uneven portions.
  • An arbitrary convex portion of the engaging portion 86f has a surface 86j on one side in the circumferential direction and a surface 86k on the other side in the circumferential direction.
  • the surface 86 j is a drive transmission surface (drive power transmission unit).
  • the moving member 86 has an outer portion (free end) 86x and a shaft 86s as a small diameter portion 86y provided closer to the drum cylinder 62 than the outer portion (free end) 86x. . Further, the moving member 86 has an inner portion 86z provided closer to the drum cylinder 62 than the small diameter portion 86y.
  • the outer side (free end) 86x of the moving member 86 has a projection 86a, a base 86b, an axis 86s, and an inclined portion 86m.
  • the diameter of the shaft 86s as the small diameter portion 86y is smaller than the diameter of the outer portion (free end) 86x. In other words, the maximum turning radius of the small diameter portion 86y is smaller than the maximum turning radius of the outer portion (free end) 86x.
  • the maximum rotation radius is the maximum value of the distance from the rotation axis L2 of the moving member 86.
  • the outer side portion 86x has a portion (sloped portion 86m) gradually moving away from the axis L2 toward the tip of the moving member 86 (see FIG. 12).
  • the maximum turning radius of the inclined portion 86m gradually increases with distance from the drum cylinder.
  • the maximum rotation radius of the small diameter portion 86y is smaller than the distance between the driving force receiving portion 86g and the rotation axis L2.
  • the diameter of the shaft 86d is larger than the diameter of the shaft 86s.
  • the outer portion distance from the axis L2 of the large diameter portion 86h of the substantially elliptical cylinder 86e is equal to or less than the outer portion distance from the axis L2 of the shaft 86d.
  • the outer diameter of the small diameter portion 86p with respect to the axis L2 is smaller than the outer distance of the large diameter portion 86h with respect to the axis L2.
  • the moving member 86 has a through hole 86c centered on the axis L2.
  • FIG. 14 is a view for explaining the contact portion between the rotary cam 92 and the linear motion cam 93. As shown in FIG. FIGS. 14 (a) and 14 (b) are the same as viewed from another angle.
  • the cylindrical portion 92 c of the rotating cam 92 is accommodated in and supported by the hole 93 c of the linear motion cam 93.
  • the end face 92b of the rotating cam 92 includes a slope 92e, an end face 92g, and an end face 92h.
  • the cam 93 d of the linear motion cam 93 includes an inclined surface 93 k and an end surface 93 l.
  • FIG. 15 is a view for explaining the configuration of the bearing 100 that accommodates the rotating cam 92. As shown in FIG. FIGS. 15 (a) and 15 (b) are the same as viewed from another angle.
  • the rotating cam 92 includes a cylindrical portion 92c, an outer cylindrical portion 92i, an engaging portion 92f, and an end surface 92b.
  • the bearing 100 includes a fan-shaped hole 100c for accommodating the cylindrical portion 92c, a hole 100d for accommodating the outer cylindrical portion 92i, an end face 100e in contact with the end face 92b, and a slit 100f for accommodating the engaging portion 92f.
  • the rotating cam 92 is rotatably attached to the bearing 100.
  • FIG. 16 is a diagram for explaining the configuration of the coupling unit U3 and the bearing 100. As shown in FIG. 16
  • Coupling unit U3 includes a linear motion cam 93.
  • the linear motion cam 93 includes a cam 93 d, a hole 93 e, and an outer end surface 93 b.
  • the bearing 100 includes a rib 100f, a hole 100g, and an end face 100h.
  • the rib 100f which the bearing 100 has is accommodated in the hole 93e which the linear motion cam 93 has.
  • the linear motion cam 93 is configured to be slidable along the rotation axis L1 of the drum cylinder 62 while being restricted from relative rotation with respect to the bearing 100.
  • the cam 93 d of the linear motion cam 93 is accommodated in the hole 100 g of the bearing 100.
  • the outer end face 93 b of the linear motion cam 93 is configured to be able to abut on the end face 100 h of the bearing 100.
  • FIG. 17 is a cross-sectional view of the coupling unit U3.
  • FIG. 18 is a partial enlarged view of FIG.
  • FIG. 17A and FIG. 18A show a state in which the moving member 86 is retracted toward the longitudinal inner side LI.
  • the coupling shaft 90 is held by the fixing screw 96 with respect to the drive side flange 87.
  • the moving member 86 is rotatable about the axis L2 with respect to the coupling shaft 90, and is supported movably in the direction of the axis L2.
  • the engaging portion 90b1 of the coupling shaft 90 and the engaging portion 86f of the moving member 86 are not engaged.
  • a coupling spring 91 as a second biasing member (second elastic member) is provided between the coupling shaft 90 and the moving member 86.
  • the coupling spring 91 acts to move the moving member 86 relative to the longitudinal axis LI with respect to the coupling shaft 90.
  • An end surface 91 a of the coupling spring 91 abuts on an end surface 90 b 2 of the coupling shaft 90.
  • the end face 91 b of the coupling spring 91 abuts on the end face 86 l of the coupling 86 (FIG. 18A).
  • the linear motion cam 93 is disposed between the moving member 86 and the drive side flange 87.
  • a pressure spring 95 for pressing the linear motion cam is disposed between the linear motion cam 93 and the drive side flange 87.
  • the pressing spring 95 acts to move the linear motion cam 93 relative to the drive side flange 87 toward the longitudinally outer side LO.
  • the pressure spring 95 is provided inside the drive side flange 87.
  • the rotating cam 92 regulates the movement of the linear motion cam 93 to the longitudinally outer side LO.
  • the restricting member 101 restricts the movement of the rotary cam 92 to the longitudinally outer side LO.
  • the restriction member 101 is fixed to the bearing 100.
  • the bearing 100 rotatably supports the drive side flange 87 and the rotary cam 92.
  • FIG. 17A shows a state in which the moving member 86 is retracted toward the longitudinally inner side LI.
  • the biasing force of the pressing spring 95 causes the linear motion cam 93 to exert a force in the direction of the longitudinal outer side LO.
  • the cam 93 d of the linear motion cam 93 abuts on the end face 92 g of the rotating cam 92.
  • the rotary cam 92 is forced by the linear motion cam 93 in the direction of the longitudinal outer side LO.
  • the end face 92 a of the rotating cam 92 is restricted by the end face 101 a of the regulating member 101 from moving to the longitudinally outside LO.
  • the coupling spring 91 biases the moving member 86 toward the longitudinally inner LI such that the end surface 86 n (of the longitudinally inner LI) of the moving member 86 abuts against the end surface 93 m of the translation cam 93.
  • the connection between the engaging portion 90b1 as the driving force receiving portion of the coupling shaft 90 and the engaging portion 86f as the driving force transmitting portion of the moving member 86 is released (disengaged state) Yes). Therefore, at this time, the rotational driving force of the moving member 86 can not be transmitted to the coupling shaft 90.
  • the moving member 86 at this time is located at the (driving force) non-transmission position.
  • FIGS. 17 (b) and 18 (b) show a state in which the moving member 86 protrudes toward the longitudinal outer side LO.
  • the rotating cam 92 is rotated to a predetermined phase by the second lever 103 (see FIGS. 6 (a) and 6 (b)). Then, the end face 93 l of the linear motion cam 93 moves from the state in which it abuts on the end face 92 g of the rotation cam 92 to the state in which it abuts on the end face 92 h (see also FIG. 14). As a result, the linear movement cam 93 is moved to the longitudinally outer side LO by the biasing force of the linear movement cam pressing spring 95. The end face 93m of the linear motion cam 93 pushes the end face 86n (of the longitudinal inner LI) of the moving member 86.
  • the moving member 86 moves to the longitudinal outer side LO Moving.
  • the engaging portion 90 b 1 as the driving force receiving portion of the coupling shaft 90 is engaged (connected) with the engaging portion 86 f as the driving force transmitting portion of the moving member 86.
  • the rotational driving force of the moving member 86 can be transmitted to the coupling shaft 90.
  • the moving member 86 at this time is located at the (driving force) transmitting position.
  • the tip 90 b of the coupling shaft 90 restricts the movement of the moving member 86 to the longitudinally outer LO.
  • FIG. 19A shows a side view of the coupling unit U3.
  • 19 (b) and 19 (c) are the B-B cross sections of FIG. 19 (a).
  • FIG. 19 (b) shows a state in which it stops at an arbitrary phase after the end of image formation.
  • the hole 94 a of the screw spring 94 is supported by the shaft 93 f of the linear motion cam 93.
  • the arm 94 c of the torsion spring 94 abuts the wall 93 h of the linear motion cam 93.
  • the arm 94 b of the torsion spring 94 abuts on a substantially elliptical cylinder 86 e of the moving member 86.
  • the arm 94b is in contact with the vicinity of the (elliptic) large diameter portion 86h of the cylinder 86e.
  • the torsion spring 94 is set such that a biasing force acts in a direction in which the arms 94 b and the arms 94 c spread. Therefore, the biasing force of the torsion spring 94 causes the moving member 86 to receive a rotational force toward the phase in which the arm 94 b abuts on the vicinity of the (elliptic) small diameter portion 86 p of the moving member 86.
  • the second lever 103 and the rotating cam 92 are moved by the biasing force of the spring 106 provided on the second side member 26R. (Fig. 6 (a)).
  • the moving member 86 is in a state in which the moving member 86 shown in FIG.
  • the moving member 86 is stopped in such a phase that the arm 94 b abuts on the vicinity of the (elliptic) small diameter portion 86 p of the moving member 86 and rotates until the rotational moment received by the moving member 86 is balanced.
  • FIG. 20 is a view for explaining the moving member 86 and the main body drive shaft 110. As shown in FIG.
  • the cartridge B includes a moving member 86 and a coupling shaft 90.
  • the device body A includes a drive shaft 110 and a bearing 111.
  • the drive shaft 110 includes a shaft portion 110a, a drive application portion 110b, a tip end portion 110c, and a tip end surface 110d.
  • the bearing 111 supports the shaft 110a.
  • the moving member 86 comprises a projection 86a.
  • the coupling shaft 90 comprises a tip 90b.
  • the drive application portion 110b of the drive shaft 110 is in contact with the drive force receiving portion of the projection 86a of the moving member 86 in a state where the tip end portion 90b of the coupling shaft 90 is in contact or close Contact.
  • the moving member 86 receives rotational driving force from the drive shaft 110.
  • FIG. 21 is a view for explaining the positional relationship between the moving member 86 and the drive shaft 110 when the cartridge B is removed from the apparatus main body A.
  • 21 (d) through 21 (f) are cross-sectional views, corresponding to FIGS. 21 (a) through 21 (c), respectively.
  • the detachment direction of the cartridge B is indicated by an arrow E.
  • 21 (a) and 21 (d) are diagrams showing the state at the end of image formation.
  • the drive shaft 110 and the moving member 86 stop at an arbitrary phase.
  • the moving member 86 is at a position projecting to the longitudinal outer side (outside of the cartridge) LO.
  • the drive application portion 110 b of the drive shaft 110 is in contact with the projection 86 a of the moving member 86.
  • 21 (b) and 21 (e) are views showing a state in which the opening / closing door 13 of the apparatus main body A is opened.
  • the moving member 86 moves to the longitudinal inner side LI.
  • the drive applying portion 110b of the drive shaft 110 and the projection 86a of the moving member 86 do not abut or slightly touch.
  • the phase control mechanism of the moving member 86 described in FIG. 19 acts. Therefore, the projection 86a of the moving member 86 rotates to the phase shown in FIG. 21E, that is, the phase at which the movement of the tip portion 110c of the drive shaft 110 is not impeded when the projection 86a is moved in the separating direction E. .
  • FIG. 21 (c) and 21 (f) show a state in which the cartridge B is in the process of being detached from the apparatus main assembly A.
  • FIG. The projection 86 a of the moving member 86 moves in the separating direction E without being inhibited by the tip 110 c of the drive shaft 110. Even if the projection 86a abuts on the tip 110c, movement of the tip 110c in the disengaging direction E is not inhibited.
  • the driving force (rotational force) that the moving member (moving coupling member) 86 receives from the outside of the cartridge is transmitted to the driving side flange 87 via the coupling shaft 90 (see FIG. 17B).
  • the moving member 86 and the coupling shaft 90 transmit the driving force to the drive side flange 87, the moving member 86 and the coupling shaft 90 are engaged with each other and integrally rotate.
  • the moving member (moving coupling member) 86 and the coupling shaft 90 are collectively referred to as a coupling member.
  • the coupling member (86, 90) is a member coupled (coupling) with the drive shaft 110 of the image forming apparatus main body, and the drive force (rotational force) from the drive shaft 110 (see FIG. 21A) outside the cartridge. Is a drive input member to be input.
  • the drive force received by the coupling member is transmitted to the drum cylinder 62 via the drive side flange 87. Since the drum cylinder 62 is rotatably supported by the frame of the cartridge B, the drum cylinder 62 rotates with respect to the frame when the driving force is transmitted.
  • the projection (driving force receiving portion) 86a provided on the moving member 86 first receives the driving force from the drive applying portion 110b of the drive shaft 110 (FIG. 21A). reference).
  • the driving force is transmitted from the engaging portion 86 f (FIG. 11A) provided on the moving member 86 to the tip end 90 b (engaging portion 90 b 1) of the coupling shaft 90.
  • the driving force is transmitted from the coupling shaft 90 to the drive side flange 87 via the fixing screw 96 (see FIG. 9) that fixes the coupling shaft 90 to the drive side flange member 87.
  • the driving side flange 87 is connected to the end of the drum cylinder 62 and transmits the driving force to the drum cylinder 62 (see FIG. 3).
  • the flange (drive side flange member 87) provided with the coupling members (86, 90) has a gear portion 87b (see FIG. 9A).
  • the driving side flange member 87 is a gear member.
  • At least a portion of the coupling member is movable at least in the direction of the axis L2 of the coupling member. That is, in the present embodiment, the moving member 86 of the coupling member moves along the axis L2 between the driving force transmitting position (projected position, advanced position) and the driving force non-transmitted position (retracted position) with respect to the driving side flange 87 (See FIG. 17 (b), (a)).
  • the driving force transmitting position (FIG. 17B is a position projecting to the outside of the cartridge so as to be away from the drum cylinder 62.
  • the driving force receiving position is the inside of the drum cylinder 62 (cartridge
  • the moving member 86 moves more than when it is at the driving force non-transmitting position (FIG. 17 (a)).
  • the tip of the member 86 is away from the drum cylinder in the direction of the axis L2.
  • the coupling shaft 90 is fixed to the drive side flange 87.
  • the coupling shaft 90 can also be referred to as a fixed member (fixed coupling member) in the coupling member.
  • the coupling shaft 90 may be configured to move slightly with respect to the driving side flange 87. For example, there may be a slight gap between the coupling shaft 90 and the drive flange 87 so that the coupling shaft 90 can move relative to the drive flange 87 within the gap.
  • the distance by which the coupling shaft 90 can move with respect to the drive side flange 87 is within a certain range, so long as the drive force can be transmitted from the coupling shaft 90 to the drive side flange 87 .
  • the coupling shaft 90 does not move along the direction of the axis L2 with respect to the driving side flange 87, and does not rotate relative to the axis L2.
  • the coupling shaft 90 can also be referred to as a connecting member connected to the driving side flange member 87 so that the driving force can be transmitted from the coupling member to the driving side flange member 87. Further, the coupling shaft 90 is a shaft provided on the drive side flange 87, and can also be called a support member for movably supporting the moving member 86.
  • the coupling shaft 90 is also between the moving member 86 and the drive side flange 87, and is also a relay member (intermediate transmission member) for relaying the driving force received by the moving member 86 to the drive side flange 87.
  • the coupling shaft 90 is also a retaining member for preventing the moving member 86 from falling off the drive side flange 87.
  • the range in which the moving member 86 can move is suppressed by the coupling shaft 90 in a certain range. That is, when the moving member 86 is positioned at the projecting position (advanced position), the movement of the moving member 86 is restricted by the tip end portion 90b of the coupling shaft 90, and the moving member 86 is further moved toward the axial direction LI. It can be suppressed (see FIG. 17 (b)). This prevents the moving member 86 in the projecting position from being separated from the drive flange member 87.
  • the coupling shaft 90 also has a shaft 90 a extending in the moving direction of the moving member 86.
  • the coupling shaft 90 is a guide member that guides the movement of the moving member 86 by the shaft portion (guide portion) 90a.
  • the coupling shaft 90 is a shaft (shaft member, column member, shaft) the major part of which (i.e., the shaft portion 90a) has a shaft shape (column shape).
  • the shaft portion 90 a is a penetrating portion passing through at least the inside of the moving member 86.
  • a portion on the tip side of the coupling shaft 90 (that is, the tip portion 90 b) is an exposed portion exposed to the outside of the moving member 86.
  • the tip 90b has a maximum turning radius larger than the maximum turning radius of the shaft 90a. That is, the distal end portion 90b is a portion (expanded portion) (expanded portion, enlarged portion, expanded portion) radially expanded (expanded portion, enlarged portion, expanded portion) from the shaft portion 90a, and the diameter of the distal end portion 90b is larger than the diameter of the shaft portion 90b. Further, the diameter of the tip portion 90b is larger than the diameter of the through hole 86c (see FIGS. 11A and 11B) of the moving member 86. In other words, the maximum turning radius of the tip 90b is larger than the maximum turning radius of the shaft 90b and the maximum turning radius of the through hole.
  • the distal end portion 90b has a circular flat plate shape (disk shape), but is not limited to this shape. Further, the maximum rotation radius of the distal end portion 90b is larger than the maximum rotation radius of the small diameter portion 86y (see FIG. 12B).
  • the distal end portion 90b is provided with a driving force receiving portion (engaging portion 90b1) for receiving a driving force from the moving member 86. That is, the tip end portion 90 b (engaging portion 90 b 1) is configured to be able to receive driving force from the moving portion phase 86 by engaging with the moving member 86.
  • the free end 86x and the small diameter portion 86y of the moving member 86 are configured to engage with the tip 90b (see FIG. 12B).
  • the free end portion 86x is provided with an engaging portion 86f for engaging with the distal end portion 90b (the engaging portion 90b1).
  • the engaging portion 90b1 (see FIGS. 10 and 9B) is located outside the shaft portion 90b and the through hole 86c in the radial direction of the coupling member. That is, the tip end 90b engages with the moving member 86 at a position outside the shaft 90b in the radial direction of the coupling member.
  • the distal end portion 90 b receives a driving force from the moving member 86 while suppressing the moving member 86 from coming off the driving side flange member. That is, the tip end portion 90b can exert both the action of restricting the movement of the moving member 86 and the action of receiving the driving force, and the structure of the coupling member can be simplified.
  • the moving member 86 of the coupling member moves from the retracted position (FIG. 17A) to the advanced position (FIG. 17A) by mounting the cartridge B on the apparatus main body A (see FIG. 1).
  • the open / close door 13 see FIG. 8B
  • the mounting of the cartridge B to the apparatus main body A is completed.
  • the lever 102 see FIGS. 5A and 8B
  • the moving member 86 moves to the advanced position (FIG. 17A).
  • the moving member 86 moves to the retracted position (FIG. 17A). That is, the moving member 86 moves in accordance with the opening / closing operation (FIGS. 8A and 8B) of the opening / closing door 13 provided in the apparatus main body A.
  • the moving member 86 and the linear motion cam 93 are sandwiched between the drive side flange 87 and the coupling shaft 90.
  • the biasing force of the spring 95 as a biasing member for biasing the moving member 86 and the linear motion cam 93 toward the longitudinally outer side LO is represented by F1.
  • the biasing force of the coupling spring 91 as a biasing member that biases the moving member 86 and the linear motion cam 93 toward the longitudinal inner side LI is F2.
  • the biasing force is such that F1> F2 (F1 is larger than F2) holds.
  • a spring 106 as an urging member shown in FIG. 5B works to move the second lever 103 to the cleaning unit 60 side.
  • the rotating cam 92 overcomes the force that inhibits the rotational movement of the rotating cam 92 generated by the biasing forces F1 and F2 to the non-engaged position shown in FIGS. 6 (a) and 17 (a). Rotate.
  • the force for rotating the rotating cam 92 generated by the biasing force of the spring 106 is larger than the force that inhibits the rotational operation of the rotating cam 92 generated by the biasing force F1 of the biasing member and the biasing force F2 of the biasing member. It is set.
  • the rotary cam 92 uses the biasing force of the spring 106 (see FIG. 6A) to retract the biasing member (spring 95) and retract the linear motion cam 93 toward the longitudinal inner side LO.
  • the moving member 86 also moves to the longitudinally inner side LO by using the biasing force of the spring 91 as the linear motion cam 93 retracts.
  • the moving member 86 in a state where no external force is applied to the first lever 102 of the cartridge B, the moving member 86 is in a state of being retracted toward the longitudinally inner side LI. That is, the moving member 86 at this time is located at the driving force non-transmission position.
  • the moving member 86 is also pushed forward by the linear motion cam 92 toward the longitudinally outer side LO. That is, the movable portion seat 86 is biased by the spring 95 via the linear motion cam 92 and moved to the drive transmission position (projected position, advanced position).
  • the coupling spring 91 continues to bias the moving member 86 in the direction (longitudinal inner side LI direction) in which the coupling spring 91 approaches the linear motion cam 93. . Therefore, even when the linear motion cam 93 moves to the longitudinally inner side LI, the coupling spring 91 does not separate from the linear motion cam 93. That is, the moving member 86 can be interlocked with the movement of the linear motion cam 93 by the biasing force F2 of the coupling spring 91 which is a biasing member.
  • the coupling spring 91 is a holding member (a maintenance member, an elastic member, an urging member) for holding (maintaining) a state in which the moving member 86 interlocks with the linear motion cam 93 by its elastic force (biasing force).
  • the linear motion cam 93 is a support member that supports the moving member 86, and is also an interlocking member that moves with the moving member 86 when it moves.
  • the lever 102 is an operation member operated from the outside of the cartridge (in the present embodiment, the open / close door 13: see FIG. 4A) in order to move the coupling member (moving member 86).
  • the first lever 102 is operatively connected (functionally) to the moving member 86. That is, the first lever 102 is connected to the moving member 86 via a coupling mechanism including the gear 104, the second lever 103, the cam mechanism (linear motion cam 93, rotating cam 93), and each spring.
  • the first lever 102 operates (moves, operates)
  • the moving member 86 also moves (moves, operates).
  • the lever 102, the lever 103, and the coupling member are disposed on the same side (i.e., the drive side) of the cartridge B.
  • the present invention has made it possible to develop the prior art.
  • an image forming apparatus having a process cartridge, a drum unit, and a process cartridge capable of receiving a driving force from the apparatus body.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrophotography Configuration And Component (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
PCT/JP2018/011561 2017-03-15 2018-03-15 ドラムユニット、カートリッジ、プロセスカートリッジおよび電子写真画像形成装置 Ceased WO2018169096A1 (ja)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP18767736.4A EP3598237B1 (en) 2017-03-15 2018-03-15 Drum unit, process cartridge, and electrophotographic image formation device
CN201880017788.3A CN110419007A (zh) 2017-03-15 2018-03-15 鼓单元、盒、处理盒和电子照相图像形成装置
US16/568,928 US10921749B2 (en) 2017-03-15 2019-09-12 Drum unit, cartridge, and process cartridge having a coupling member with a movable member and portion for restricting movement of the movable member
US17/152,879 US11327435B2 (en) 2017-03-15 2021-01-20 Drum unit, cartridge, process cartridge and electrophotographic image forming apparatus having a coupling member with a movable member
US17/712,261 US11573525B2 (en) 2017-03-15 2022-04-04 Drum unit, cartridge, process cartridge and electrophotographic image forming apparatus having a coupling member and movable member
US18/089,751 US11774906B2 (en) 2017-03-15 2022-12-28 Drum unit, cartridge, process cartridge and electrophotographic image forming apparatus having a coupling member and a movable member
US18/232,939 US12130582B2 (en) 2017-03-15 2023-08-11 Drum unit, cartridge, process cartridge and electrophotographic image forming apparatus having a movable coupling member
US18/739,468 US12298705B2 (en) 2017-03-15 2024-06-11 Drum unit, cartridge, process cartridge and electrophotographic image forming apparatus having a movable coupling member

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017050285 2017-03-15
JP2017-050285 2017-03-15

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US16/568,928 Continuation US10921749B2 (en) 2017-03-15 2019-09-12 Drum unit, cartridge, and process cartridge having a coupling member with a movable member and portion for restricting movement of the movable member
US16/568,928 Division US10921749B2 (en) 2017-03-15 2019-09-12 Drum unit, cartridge, and process cartridge having a coupling member with a movable member and portion for restricting movement of the movable member

Publications (1)

Publication Number Publication Date
WO2018169096A1 true WO2018169096A1 (ja) 2018-09-20

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EP (1) EP3598237B1 (enExample)
JP (1) JP7091096B2 (enExample)
CN (1) CN110419007A (enExample)
MA (1) MA47791A (enExample)
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JP7091096B2 (ja) * 2017-03-15 2022-06-27 キヤノン株式会社 ドラムユニット、カートリッジ、プロセスカートリッジおよび電子写真画像形成装置
WO2022196788A1 (ja) 2021-03-16 2022-09-22 キヤノン株式会社 トナーカートリッジ及び画像形成装置

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US12298705B2 (en) 2025-05-13
US11573525B2 (en) 2023-02-07
US10921749B2 (en) 2021-02-16
CN110419007A (zh) 2019-11-05
EP3598237B1 (en) 2023-09-06
MA47791A (fr) 2021-05-26
US11774906B2 (en) 2023-10-03
JP2018156080A (ja) 2018-10-04
US20210141334A1 (en) 2021-05-13
US11327435B2 (en) 2022-05-10
US12130582B2 (en) 2024-10-29
JP7091096B2 (ja) 2022-06-27
EP3598237A4 (en) 2021-05-26
EP3598237A1 (en) 2020-01-22
US20230384732A1 (en) 2023-11-30
US20230152748A1 (en) 2023-05-18
US20220229393A1 (en) 2022-07-21
US20200041951A1 (en) 2020-02-06
US20240329595A1 (en) 2024-10-03

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