WO2014080540A1 - Dispositif de formation d'image - Google Patents

Dispositif de formation d'image Download PDF

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Publication number
WO2014080540A1
WO2014080540A1 PCT/JP2012/081128 JP2012081128W WO2014080540A1 WO 2014080540 A1 WO2014080540 A1 WO 2014080540A1 JP 2012081128 W JP2012081128 W JP 2012081128W WO 2014080540 A1 WO2014080540 A1 WO 2014080540A1
Authority
WO
WIPO (PCT)
Prior art keywords
cartridge
interference
guide
image forming
forming apparatus
Prior art date
Application number
PCT/JP2012/081128
Other languages
English (en)
Japanese (ja)
Inventor
進 佐久間
篤史 三輪
Original Assignee
ブラザー工業株式会社
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 ブラザー工業株式会社 filed Critical ブラザー工業株式会社
Priority to CN201290001307.8U priority Critical patent/CN204925625U/zh
Publication of WO2014080540A1 publication Critical patent/WO2014080540A1/fr

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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
    • G03G21/1842—Means for handling the process cartridge in the apparatus body for guiding and mounting the process cartridge, positioning, alignment, locks

Definitions

  • the present invention relates to an image forming apparatus employing an electrophotographic system.
  • a printer including a main body casing and a process cartridge that includes a photosensitive drum and is configured to be detachable from the main body casing.
  • a guide groove for guiding the mounting of the process cartridge is provided in the main body casing, the process cartridge includes a housing for accommodating the photosensitive drum, and the photosensitive drum is along the axial direction.
  • a laser printer has been proposed that includes a drum shaft that extends and protrudes from both ends of the housing (see, for example, Patent Document 1).
  • the mounting of the process cartridge on the main body casing is guided by fitting both end portions of the drum shaft into the guide grooves.
  • the user may forcibly insert the process cartridge into the main body casing accidentally in a state where both ends of the drum shaft are not fitted in the guide grooves.
  • both ends of the drum shaft interfere with the members in the main body casing, and the members in the main body casing are damaged, or both ends of the drum shaft are caught by the members in the main body casing and inserted by mistake. It may be difficult to remove the process cartridge from the main casing.
  • an object of the present invention is to provide an image forming apparatus capable of suppressing erroneous insertion of a cartridge into the apparatus main body.
  • an image forming apparatus of the present invention is configured to rotate about an axis and has a cartridge having a rotating body configured to carry a developer; An apparatus main body having a cartridge mounting portion configured to be mounted with a cartridge.
  • the main body of the apparatus has a guide portion configured to guide mounting of the cartridge with respect to the cartridge mounting portion, and a path different from the mounting track of the cartridge guided by the guide portion and mounted to the cartridge mounting portion. And a restricting portion for restricting insertion of the cartridge when inserted into the apparatus main body.
  • the cartridge When the cartridge is inserted into the apparatus main body with a different trajectory, the cartridge moves in a direction in which the interference portion comes into contact with the restriction portion and when the restriction portion and the interference portion come into contact with each other, the interference portion moves away from the restriction portion.
  • a regulating member that regulates.
  • the apparatus main body since the apparatus main body has the guide portion, the cartridge is guided to the guide portion when the cartridge is attached to the cartridge attachment portion. Therefore, the mounting operation of the cartridge with respect to the cartridge mounting portion can be facilitated.
  • the apparatus main body has a restriction portion and the cartridge has an interference portion
  • the interference portion and the restriction portion come into contact with each other. Further insertion into the device body is restricted. Therefore, erroneous insertion of the cartridge into the apparatus main body can be suppressed.
  • the cartridge is restricted by the restriction member from moving in a direction in which the interference part moves away from the restriction part when the restriction part and the interference part come into contact with each other. For this reason, the interference portion and the restriction portion can be reliably brought into contact with each other when inserted into the apparatus main body along a track different from the mounting track.
  • the guide portion may be configured to guide the first side, which is one side in the axial direction along the axis of the cartridge, as a reference when the cartridge is mounted on the cartridge mounting portion.
  • the guide portion guides with reference to the first side of the cartridge.
  • the interference unit includes a first interference unit provided on the first side in the axial direction, and a second interference unit provided on the second side opposite to the first side in the axial direction. You may have. In this case, the axial length of the second interference part is formed longer than the axial length of the first interference part.
  • the axial length of the second interference portion is formed to be longer than the axial length of the first interference portion, so when the cartridge is mounted on the cartridge mounting portion, Even if a relatively large backlash occurs on the second side of the cartridge, the second interference portion and the restriction portion can be reliably brought into contact with each other.
  • the cartridge may have a frame that accommodates the rotating body.
  • the second interference unit is supported by the frame as a separate member from the frame.
  • the second interference portion may have a relatively large backlash compared to the first side of the cartridge. Therefore, the impact when the second interference portion and the restriction portion contact each other may be greater than the impact when the first interference portion and the restriction portion contact each other.
  • the frame may include a first frame that rotatably supports the rotating body and a second frame that is assembled to the first frame so as to cover the rotating body.
  • a second interference part support part that supports the second interference part may be provided at an end part on the second side of the second frame. In this case, the second interference portion support portion is reinforced.
  • the impact caused by the contact between the second interference part and the restricting part causes the second interference part to pass through the second interference part. Acts on the support section.
  • the second frame may support a charger configured to charge the surface of the rotating body.
  • a first interference portion support portion that supports the first interference portion is provided at an end portion on the first side of the first frame.
  • the first interference part is supported by the first interference part support part provided in the first frame, the impact when the first interference part and the regulation part come into contact is charged. It can suppress acting on the 2nd frame which supports a container. Therefore, it can suppress that the relative positional accuracy of a charger and a rotary body falls.
  • the second interference part is supported by the second interference part support part provided in the second frame.
  • the second interference part support part is reinforced and the deformation is suppressed, It can suppress that the relative positional accuracy of a charger and a rotary body falls by the impact when a control part contacts.
  • frame may have the wall part arrange
  • positioned at the 2nd side is comprised so that rigidity may become larger than the wall part arrange
  • positioned in the vicinity of the 2nd interference part is on the 1st side. It is comprised so that rigidity may become larger than the wall part arrange
  • the cartridge may have a first guided portion guided by the guide portion.
  • the apparatus main body has an abutting portion that abuts the first guided portion when the restricting portion and the interference portion come into contact with each other, and restricts the cartridge from moving in a direction away from the restricting portion. ing.
  • the first guided portion is guided by the guide portion, so that the smooth mounting operation of the cartridge to the cartridge mounting portion is reliably ensured. can do.
  • the restricting portion and the interference portion come into contact with each other, the first guided portion of the cartridge comes into contact with the contact portion of the apparatus main body, so that it is ensured that the cartridge moves so that the interference portion moves away from the restricting portion.
  • an opening for attaching and detaching the cartridge may be formed in the apparatus main body. In this case, the contact portion is exposed from the upstream side in the mounting direction through the opening.
  • the contact portion is exposed from the upstream side in the mounting direction through the opening, the first portion that contacts the contact portion when the restricting portion and the interference portion come into contact with each other.
  • the guided portion is exposed from the upstream side in the mounting direction through the opening.
  • the user can easily confirm that the first guided portion and the contact portion are in contact with each other, and can easily grasp that the cartridge is inserted into the apparatus main body along a track different from the mounting track.
  • the interference part may be provided in the downstream part of the mounting direction of the cartridge in the cartridge.
  • the movement of the cartridge can be regulated at an early stage when the cartridge is erroneously inserted into the apparatus main body, as compared with the case where the interference portion is provided in the upstream portion of the cartridge mounting direction.
  • the cartridge may have a gripping part that is gripped when being attached to and detached from the cartridge mounting part.
  • the gripping part may protrude from the opening part toward the upstream side in the mounting direction when the restricting part and the interference part come into contact with each other.
  • the gripping part is gripped when the cartridge is attached to and detached from the cartridge mounting part, so that the attaching / detaching operation of the cartridge to the cartridge mounting part can be facilitated.
  • the apparatus main body may have an opening / closing member configured to move to an open position where the opening is opened and a closed position where the opening is closed.
  • the opening / closing member is configured such that the movement from the open position to the closed position is restricted when the restricting portion and the interference portion come into contact with each other.
  • the cartridge when the restricting portion and the interference portion come into contact with each other, since the movement of the opening / closing member from the open position to the closed position is restricted, the cartridge is erroneously inserted into the apparatus main body, It can suppress that an opening-and-closing member is arrange
  • the opening / closing member is disposed at a restriction position where movement to the downstream side in the mounting direction is restricted by contact between the restriction part and the interference part when moving from the open position to the closed position.
  • the cartridge is configured to move from the restriction position to the guide position where the first guided portion is guided by the guide portion when the grip portion is pressed by the pressing portion.
  • the pressing portion presses the grip portion of the cartridge, and the first guided portion is moved toward the guide portion.
  • the cartridge is moved from the restriction position toward the guide position.
  • the cartridge in the restricting position is once removed from the apparatus main body, it is not necessary to insert the cartridge into the apparatus main body again, and by moving the opening / closing member from the open position to the closed position, the cartridge is To the guide position.
  • the grip portion may have a guide surface that moves the cartridge from the restriction position toward the guide position when pressed by the pressing portion.
  • the 1st to-be-guided part may be formed in the substantially cylindrical shape extended in the axial direction along an axis.
  • the first guided portion is formed in a substantially cylindrical shape, when the pressing portion presses the gripping portion and the first guided portion is moved toward the guide portion, Smooth movement of the first guided portion can be ensured.
  • the cartridge may have a second guided portion provided on the downstream side in the cartridge mounting direction with respect to the first guided portion.
  • the guide part may have a first guide part configured to guide the first guided part and a second guide part configured to guide the second guided part.
  • the interference part is disposed in the vicinity of the second guided part.
  • the first guided portion is guided by the first guide portion, and the second guided portion is guided by the second guide portion. Therefore, it is possible to further facilitate the mounting operation of the cartridge with respect to the cartridge mounting portion.
  • the interference part which contacts a control part and the 2nd guided part guided by the 2nd guide part are arrange
  • the interference unit may be configured to receive the regulating unit from the upstream side in the cartridge mounting direction.
  • the interference portion receives the restriction portion from the upstream side in the mounting direction. And the restricting portion can be reliably engaged.
  • the image forming apparatus of the present invention erroneous insertion of the cartridge into the apparatus main body can be reliably suppressed.
  • FIG. 1 is a central sectional view of a printer as an embodiment of the image forming apparatus of the present invention.
  • FIG. 2 is a perspective view of the process cartridge shown in FIG. 1 as viewed from the upper left side.
  • FIG. 3 is a perspective view of the process cartridge shown in FIG. 2 as viewed from the upper right side.
  • FIG. 4 is a perspective view of the process cartridge shown in FIG. 3 as viewed from the front upper side.
  • FIG. 5 is a perspective view of the printer shown in FIG. 1 as viewed from the upper right side, and shows a state where the process cartridge is in the mounting position.
  • FIG. 6 is a perspective view of the printer shown in FIG. 1 as viewed from the upper right side, and shows a state in which the process cartridge is in the restriction position.
  • FIG. 1 is a central sectional view of a printer as an embodiment of the image forming apparatus of the present invention.
  • FIG. 2 is a perspective view of the process cartridge shown in FIG. 1 as viewed from the upper left side
  • FIG. 7 is a plan view of the printer shown in FIG.
  • FIG. 8 is a cross-sectional view of the printer shown in FIG.
  • FIG. 9 is a cross-sectional view taken along the line BB of the printer shown in FIG. 7 and shows a state where the process cartridge is in the restriction position.
  • FIG. 10 is a cross-sectional view taken along the line BB of the printer for explaining the movement state of the process cartridge shown in FIG. 8, and shows a state where the process cartridge is in the process of moving from the restricting position to the guide position.
  • FIG. 11 is a cross-sectional view taken along the line BB of the printer for explaining the movement state of the process cartridge following FIG. 10 and shows the state where the process cartridge is in the guide position.
  • FIG. 10 is a cross-sectional view taken along the line BB of the printer for explaining the movement state of the process cartridge following FIG. 10 and shows the state where the process cartridge is in the guide position.
  • FIG. 12 is a cross-sectional view taken along the line CC of the printer shown in FIG. 7 and shows a state where the process cartridge is in the restricting position.
  • FIG. 13 is a cross-sectional view taken along the line CC of the printer for explaining the movement state of the process cartridge shown in FIG. 12, and shows a state where the process cartridge is in the process of moving from the restricting position to the guide position.
  • FIG. 14 is a cross-sectional view taken along the line CC of FIG. 13 for explaining the movement state of the process cartridge, and shows the state where the process cartridge is in the guide position.
  • a printer 1 as an example of an image forming apparatus includes a main body casing 2 as an example of an apparatus main body.
  • the main casing 2 is formed in a substantially box shape, and forms an image on the fed paper P and a paper feeding unit 3 configured to feed the paper P as an example of a recording medium in the internal space thereof.
  • the image forming unit 4 configured to do so is accommodated.
  • the left side of the paper in FIG. 1 is the rear side and the right side of the paper in FIG. 1 is the front side, based on the state where the printer 1 is placed horizontally. Further, when the printer 1 is viewed from the front side, the left and right sides are used as a reference, the paper side in FIG. 1 is the left side, and the back side is the right side. Further, the upper side of the drawing in FIG. 1 is the upper side, and the lower side of the drawing is the lower side.
  • the left-right direction is an example of the axial direction
  • the left side is a first side that is one side in the axial direction
  • the right side is a second side that is the other side in the axial direction.
  • the up-down direction is an example of an orthogonal direction orthogonal to the axial direction
  • the lower side is one side of the orthogonal direction
  • the upper side is the other side of the orthogonal direction.
  • the cartridge opening 5 is formed to attach and detach a process cartridge 15 to be described later, and is formed through the upper end of the main casing 2 in the vertical direction.
  • the paper opening 6 is formed to introduce the paper P, and is formed through the front end of the main casing 2 in the front-rear direction.
  • the main casing 2 is provided with a top cover 7 as an example of an opening / closing member at the upper end, and a paper feed cover 8 at the front end.
  • the top cover 7 is formed so as to extend in the front-rear direction, and a pressing portion 10 is provided at a substantially central portion in the front-rear direction on the lower surface thereof.
  • a plurality of pressing portions 10 are provided corresponding to the pressed portions 78 described later, specifically, as shown in FIG. 5, two are provided at intervals in the left-right direction. Further, as shown in FIG. 1, the pressing portion 10 is formed in a substantially rectangular shape in a side view protruding downward from the lower surface of the top cover 7 and extends in the left-right direction.
  • the inclined surface 43 is formed so as to incline backward as it goes downward from the substantially vertical center of the front surface of the pressing portion 10.
  • the top cover 7 is swingably provided with the rear end portion as a fulcrum, in a closed position for closing the cartridge opening 5 and an open position for opening the cartridge opening 5 as shown in FIG. Yes.
  • the paper feed cover 8 is swingably provided between a closed position for closing the paper opening 6 and an open position for opening the paper opening 6 with the lower end portion as a fulcrum. .
  • each of the top cover 7 and the paper feed cover 8 arranged at the closed position is indicated by a solid line, and each of the top cover 7 and the paper feed cover 8 arranged between the closed position and the open position is shown. Is indicated by a virtual line.
  • the paper feed unit 3 includes a paper placement unit 9 provided at the bottom of the main casing 2. The paper placing portion 9 is communicated with the outside of the main body casing 2 through the paper opening 6.
  • the front side portion of the paper P is stacked on the upper surface of the paper feed cover 8 and the rear side portion of the paper P is placed through the paper opening 6 in a state where the paper feed cover 8 is disposed at the open position. Stacked in the unit 9.
  • the image forming unit 4 includes a process cartridge 15 as an example of a cartridge, a scanner unit 16, and a fixing unit 17.
  • the process cartridge 15 is configured to be detachable from the main casing 2 and is mounted on the main casing 2 above the rear portion of the paper feed unit 3.
  • the process cartridge 15 includes a drum cartridge 18 that is detachably attached to the main body casing 2 and a developing cartridge 19 that is detachably attached to the drum cartridge 18.
  • the drum cartridge 18 includes a photosensitive drum 20 as an example of a rotating body, a transfer roller 21, and a scorotron charger 22.
  • the photosensitive drum 20 is rotatably provided on the rear side portion of the drum cartridge 18.
  • the transfer roller 21 is disposed on the rear side of the photosensitive drum 20 so as to be in pressure contact with the photosensitive drum 20 from the rear side, and is rotatably provided on the drum cartridge 18.
  • the scorotron charger 22 is disposed opposite to the front upper side of the photosensitive drum 20 with an interval.
  • the developing cartridge 19 is disposed on the front lower side of the photosensitive drum 20. Further, the developing cartridge 19 includes a developing frame 25.
  • the developing frame 25 is formed in a substantially box shape extending in the left-right direction, and a rear end portion thereof is opened rearward.
  • a toner storage chamber 26 and a developing chamber 27 are partitioned in parallel in the front-rear direction.
  • the toner storage chamber 26 and the developing chamber 27 are communicated with each other through a communication port 28.
  • the toner storage chamber 26 stores toner as an example of a developer, and an agitator 29 is provided at a substantially central portion in the front-rear and vertical directions.
  • the developing chamber 27 is provided with a developing roller 34, a supply roller 33, and a layer thickness regulating blade 35.
  • the developing roller 34 includes a developing roller shaft 52 extending in the left-right direction, and a rubber roller 48 that covers the developing roller shaft 52 so that both ends thereof are exposed.
  • the developing roller 34 is disposed at the rear end portion of the developing chamber 27 such that the rubber roller 48 is exposed from the rear side and the upper side and is in contact with the photosensitive drum 20 from the front lower side.
  • the developing roller 34 is supported by the developing frame 25 by rotatably supporting both ends of the developing roller shaft 52 on the left and right side walls of the developing frame 25. Both end portions of the developing roller shaft 52 protrude from the left and right side walls of the developing frame 25 outward in the left-right direction.
  • color members 49 formed in a substantially cylindrical shape are provided at both ends of the developing roller shaft 52, respectively. The color member 49 covers both ends of the developing roller shaft 52 from the radially outer side.
  • the supply roller 33 includes a supply roller shaft 50 extending in the left-right direction, and a sponge roller 51 that covers the supply roller shaft 50 so that both ends thereof are exposed.
  • the supply roller 33 is disposed so that the sponge roller 51 is in pressure contact with the rubber roller 48 from the front lower side, and both ends of the supply roller shaft 50 are rotatably supported on the left and right side walls of the developing frame 25.
  • the development frame 25 is supported.
  • the layer thickness regulating blade 35 is supported by the developing frame 25 so as to contact the developing roller 34 from the front side.
  • the scanner unit 16 is disposed in front of the process cartridge 15 in the main body casing 2.
  • the scanner unit 16 emits a laser beam L based on image data toward the photosensitive drum 20 to expose the peripheral surface of the photosensitive drum 20.
  • the fixing unit 17 is disposed above the rear portion of the drum cartridge 18 in the main body casing 2.
  • the fixing unit 17 includes a heating roller 38 and a pressure roller 39 that presses against the heating roller 38 from the upper rear side.
  • (4) Image Forming Operation The toner in the toner storage chamber 26 of the developing cartridge 19 is supplied to the supply roller 33 through the communication port 28 by the rotation of the agitator 29, and further supplied to the developing roller 34. Between 33 and the developing roller 34, it is triboelectrically charged to the positive polarity.
  • the toner supplied to the developing roller 34 is regulated by the layer thickness regulating blade 35 as the developing roller 34 rotates, and is carried on the surface of the developing roller 34 as a thin layer having a constant thickness.
  • the surface of the photosensitive drum 20 is uniformly charged by the scorotron charger 22 and then exposed by the scanner unit 16. Thereby, an electrostatic latent image based on the image data is formed on the peripheral surface of the photosensitive drum 20.
  • the toner carried on the developing roller 34 is supplied to the electrostatic latent image on the circumferential surface of the photosensitive drum 20, whereby the toner image is carried on the circumferential surface of the photosensitive drum 20.
  • the paper P stacked on the paper placement unit 9 is sent between the paper feed roller 12 and the paper feed pad 13 by the rotation of the pickup roller 11, and is fed one by one by the rotation of the paper feed roller 12. Thereafter, the sheet P is conveyed to the sheet feeding path 14 extending in the vertical direction by the rotation of the sheet feeding roller 12, and is fed between the photosensitive drum 20 and the transfer roller 21 one by one at a predetermined timing. Paper. Then, when passing between the photosensitive drum 20 and the transfer roller 21, the toner image is transferred to the paper P to form an image.
  • the paper P is heated and pressed when it passes between the heating roller 38 and the pressure roller 39. At this time, the image is thermally fixed on the paper P. Thereafter, the paper P is conveyed toward the pair of paper discharge rollers 40 and is discharged onto a paper discharge tray 41 formed on the upper surface of the top cover 7 by the paper discharge rollers 40.
  • the process cartridge 15 includes the drum cartridge 18 and the developing cartridge 19 as described above and shown in FIGS.
  • the side on which the photosensitive drum 20 is disposed is the rear side of the process cartridge 15, and the side on which the scorotron charger 22 is disposed is the upper side. . That is, the up / down / front / rear direction with respect to the process cartridge 15 is different from the up / down / front / rear direction with respect to the printer 1, and the process cartridge 15 is arranged on the printer 1 so that the front side is the front lower side of the printer 1 and the rear side is the rear upper side of the printer 1. It is installed.
  • the drum cartridge 18 includes a drum frame 45 as an example of a frame.
  • the drum frame 45 includes a base frame 46 as an example of a first frame and a cover frame 47 as an example of a second frame.
  • the base frame 46 is formed of a resin material such as a polymer alloy of polycarbonate and polystyrene, and a pair of left and right base side walls 54 as an example of a wall portion;
  • a base lower wall 55, a base rear wall 56, and a base front wall 57 are integrally provided.
  • the pair of base side walls 54 are arranged to face each other with a space therebetween in the left-right direction.
  • the base side wall 54 (hereinafter referred to as the base left wall 54L) disposed on the left side is a rear side portion as shown in FIG.
  • the drum accommodating portion side wall 60 as an example and a developing accommodating portion side wall 61 which is a front side portion thereof are integrally provided.
  • the drum housing side wall 60 is formed in a substantially flat plate shape that is substantially rectangular in a side view.
  • the development accommodating portion side wall 61 is formed in a substantially rectangular shape in side view extending continuously from the lower portion of the front end edge of the drum accommodating portion side wall 60 toward the front upper side.
  • a collar receiving groove 62 and a fitting recess 63 are formed in the base left wall 54L.
  • the color receiving groove 62 is formed above the connecting portion of the front end portion of the drum accommodating portion side wall 60 with the developing accommodating portion side wall 61, and is substantially U-shaped from the front end edge of the drum accommodating portion side wall 60. It is formed in a letter shape. Further, the lower surface of the color receiving groove 62 is continuous with the upper surface of the developing container side wall 61.
  • the fitting recessed part 63 is formed in the rear side part in the left surface of the drum accommodating part side wall 60. As shown in FIG.
  • the fitting recess 63 is notched in a substantially rectangular shape in a side view that is recessed from the left surface of the drum housing side wall 60 to the right and that is recessed downward from the rear portion of the upper end edge of the drum housing side wall 60. Is formed.
  • the base left wall 54L is integrally provided with a first interference part 64 as an example of an interference part and a left guide boss 65 as an example of a regulating member and a first guided part.
  • the first interference portion 64 is provided at the front end portion of the upper end surface of the drum housing portion side wall 60 and is formed in a substantially rectangular shape in side view protruding upward from the upper end surface of the drum housing portion side wall 60. Further, as shown in FIG. 8, the rear end surface of the first interference portion 64 is formed to incline backward as it goes upward.
  • the left guide boss 65 is provided at a front end portion on the left surface of the developer accommodating portion side wall 61 and is formed in a substantially cylindrical shape that protrudes leftward from the left surface of the developer accommodating portion side wall 61. .
  • the base side wall 54 (hereinafter referred to as the base right wall 54R) disposed on the right side of the pair of base side walls 54, as shown in FIG. , And a developing container side wall 69 which is a front portion thereof.
  • the drum housing side wall 68 is formed in a substantially flat plate shape that is substantially rectangular when viewed from the side.
  • the development accommodating portion side wall 69 is formed in a substantially rectangular shape in side view extending continuously from the lower portion of the front end edge of the drum accommodating portion side wall 60 toward the front upper side.
  • a collar receiving groove 74 and a fitting recess 70 are formed in the base right wall 54R.
  • the color receiving groove 74 is connected to the developing container side wall 69 at the front end of the drum container side wall 68 so as to coincide with the color receiving groove 62 formed in the base left wall 54L when projected in the left-right direction. It is formed on the upper side.
  • the fitting recess 70 is formed in the upper portion of the right surface of the drum accommodating portion side wall 68. Further, the fitting recess 70 is recessed from the right surface of the drum housing side wall 68 toward the left, and is recessed substantially downward from the substantially central portion in the front-rear direction at the upper end edge of the drum housing side wall 60. It is formed in a circular shape.
  • the base right wall 54R is integrally provided with a reinforcing portion 71 and a right guide boss 72 as an example of a restricting member and a first guided portion.
  • the reinforcing portion 71 is provided on the right surface of the base right wall 54R so as to cover the collar receiving groove 74 from the right side.
  • the reinforcing portion 71 is formed in a substantially trapezoidal shape in a side view that becomes narrower as it goes upward, and covers the color receiving groove 74 in the upper portion thereof, and the drum accommodating portion side wall 68 and the developer accommodating portion in the lower portion.
  • the connecting portion with the side wall 69 is covered.
  • the base right wall 54R is reinforced by the reinforcing portion 71, and is configured to be more rigid than the base left wall 54L.
  • the right guide boss 72 is provided at the front end portion on the right surface of the developing container side wall 69 so as to coincide with the left guide boss 65 when projected in the left-right direction.
  • the right guide boss 72 is formed in a substantially cylindrical shape that protrudes rightward from the right surface of the developer accommodating portion side wall 61.
  • the base lower wall 55 is formed in a substantially flat plate shape that is long in the left-right direction so as to be bridged between the lower ends of the base side walls 54.
  • the base rear wall 56 is constructed between the rear ends of the base side walls 54 as shown in FIG. As shown in FIG. 1, the base rear wall 56 is formed in a substantially circular arc shape in a side view opened toward the front upper side, and is formed in a substantially partial cylindrical shape extending in the left-right direction.
  • the transfer roller 21 is rotatably accommodated inside the base rear wall 56.
  • the base front wall 57 is constructed between the front end portions of both base side walls 54, and the lower end portion thereof is connected to the front end portion of the base lower wall 55. Further, the base front wall 57 is formed so as to incline forward as it goes upward from the front end of the base lower wall 55. Further, as shown in FIGS. 9 and 12, the base front wall 57 is disposed on the rear side of the center axis of the left guide boss 65 and the right guide boss 72 when projected in the left-right direction.
  • a grip portion 75 is integrally provided on the base front wall 57.
  • the grip portion 75 integrally includes an extension portion 76, a grip portion 77, and a pressed portion 78.
  • the extending portion 76 is continuously forward from the substantially central portion in the left-right direction at the upper end portion of the base front wall 57, and is forwardly moved upward so that the inclination is the same as the base front wall 57. Inclined.
  • the gripping portion 77 is formed in a substantially rectangular tube shape that protrudes rearward from a substantially central portion in the left-right direction on the rear surface of the extending portion 76.
  • the pressed portions 78 are provided on both the left and right ends of the rear surface of the extending portion 76, and are formed in a substantially flat plate shape that is substantially rectangular in a side view and protrudes rearward from the rear surface of the extending portion 76.
  • the pressed portion 78 is disposed opposite to the left and right end portions of the gripping portion 77 on the outer side in the left-right direction with a gap therebetween.
  • the upper end portion of the pressed portion 78 is disposed slightly below the upper end portion of the extending portion 76.
  • the upper end surface of the pressed portion 78 is partitioned as a guide surface 79 as an example of a guide surface.
  • the guide surface 79 is formed so as to extend along the front-rear direction.
  • the cover frame 47 is formed of a resin material such as a polymer alloy of polycarbonate and acrylonitrile / butadiene / styrene resin, and has a substantially rectangular tube shape extending in the left-right direction and opened downward and forward.
  • the cover frame 47 includes a pair of left and right cover side walls 80, a cover upper wall 81, and a cover rear wall 82.
  • the pair of cover side walls 80 are arranged to face each other with a space in the left-right direction.
  • a cover side wall 80 (hereinafter referred to as a cover left wall 80L) disposed on the left side is formed in a substantially flat plate shape that is substantially rectangular in a side view as shown in FIG. Yes.
  • the cover left wall 80L is formed in substantially the same shape and size as the fitting recess 63 in a side view, and is formed so as to be able to fit into the fitting recess 63.
  • a cover side wall 80 (hereinafter referred to as a cover right wall 80R) disposed on the right side is formed in a substantially rectangular flat plate shape extending in the front-rear direction as shown in FIG. Has been.
  • a fitting convex portion 85 and an electrode cover 84 are provided on the cover right wall 80R.
  • the fitting convex portion 85 is formed in a substantially semicircular shape in a side view projecting downward from a substantially central portion in the front-rear direction of the lower end edge of the cover right wall 80R.
  • the fitting convex portion 85 is formed in substantially the same shape and size as the fitting concave portion 70 in a side view, and is formed so as to be fitted into the fitting concave portion 70.
  • the electrode cover 84 is formed of a resin material such as a polymer alloy of polycarbonate and acrylonitrile / butadiene / styrene resin as a separate member from the cover right wall 80R.
  • the electrode cover 84 is formed in a substantially flat plate shape that is substantially rectangular in a side view extending in the front-rear direction, and is supported by the upper portion of the right surface of the cover right wall 80R.
  • the electrode cover 84 is integrally provided with an electrode holding portion 86 as an example of a second interference portion support portion and a second interference portion 87 as an example of an interference portion.
  • the electrode holding portion 86 is formed in a substantially rectangular tube shape that protrudes rightward from the front end portion on the right surface of the electrode cover 84. Thereby, the electrode holding
  • the second interference part 87 is provided on the upper surface of the electrode holding part 86, and is formed in a substantially crank shape in a side view.
  • the second interference portion 87 integrally includes a rear portion 89, a front portion 88, and a step portion 90.
  • the rear portion 89 is formed in a substantially flat plate shape that is substantially rectangular in plan view.
  • the front side portion 88 is disposed on the front side and the upper side of the front side portion 88, and is formed in a substantially flat plate shape having a substantially rectangular shape in plan view.
  • the stepped portion 90 is provided so as to connect the front end portion of the rear portion 89 and the rear end portion of the front portion 88, and rearward as it goes upward from the front end portion of the rear portion 89. It is formed so as to be inclined.
  • the left-right direction length L2 of the 2nd interference part 87 is formed longer than the left-right direction length L1 of the 1st interference part 64, as shown in FIG.
  • a charger electrode 91 is provided on the cover right wall 80R.
  • the charger electrode 91 is accommodated in the electrode holding portion 86 so as to be exposed from the right side, and is electrically connected to the scorotron charger 22.
  • the charger electrode 91 is brought into contact with a main body electrode provided in the main body casing 2 in a state where the process cartridge 15 is disposed at a mounting position described later. Then, power from the main body electrode is supplied to the scorotron charger 22 via the charger electrode 91.
  • the cover upper wall 81 is provided between the upper ends of the cover side walls 80, and is formed in a substantially rectangular tube shape that extends in the left-right direction and opens downward. As shown in FIG. 1, the above scorotron charger 22 is supported inside the cover upper wall 81.
  • the cover rear wall 82 is installed between the rear ends of the cover side walls 80, and the upper end thereof is connected to the rear end of the cover upper wall 81. As shown in FIG. 1, the cover rear wall 82 is formed so as to incline backward as it goes downward.
  • a paper discharge opening 92 is formed in the cover rear wall 82.
  • the paper discharge opening 92 is formed in a central portion of the cover rear wall 82 and is formed to penetrate in a substantially rectangular shape in rear view extending in the left-right direction.
  • the drum frame 45 has a front portion partitioned as a developing cartridge storage portion 95 and a rear portion partitioned as a drum storage portion 96.
  • the developing cartridge housing portion 95 is defined in detail by a pair of developing housing portion side walls 61, a base front wall 57 and a front lower portion of the base lower wall 55.
  • the upper side is opened so as to allow
  • the developer cartridge 19 is accommodated in the developer cartridge accommodating portion 95.
  • the left color member 49 is received in the color receiving groove 62 of the base left wall 54L
  • the right color member 49 is received in the color receiving wall of the base right wall 54R. It is received in the groove 74.
  • the drum accommodating portion 96 is partitioned by a pair of drum accommodating portion side walls 60, a base rear wall 56, a rear portion of the base lower wall 55, and a cover frame 47.
  • the rear surface of the first interference portion 64 and the stepped portion 90 of the second interference portion 87 are configured to coincide with each other when projected in the left-right direction.
  • the photosensitive drum 20 is accommodated in the internal space of the drum accommodating portion 96.
  • the photosensitive drum 20 includes a drum body 97 and a drum shaft 98.
  • the drum body 97 is formed in a substantially cylindrical shape extending in the left-right direction, and a photosensitive layer made of resin is formed on the peripheral surface thereof so as to cover the peripheral surface.
  • the drum shaft 98 is formed in a substantially cylindrical shape extending in the left-right direction, and is inserted into the drum main body 97 so as to be relatively rotatable so that the central axis thereof coincides with the central axis of the drum main body 97.
  • the left end portion 105 of the drum shaft 98 passes through the drum housing side wall 60 and the cover left wall 80L so as not to be relatively rotatable in the left-right direction, and the right end portion 106 of the drum shaft 98 is As shown in FIG. 2, the drum accommodating portion side wall 68 and the fitting convex portion 85 are penetrated so as not to be relatively rotatable in the left-right direction.
  • the photosensitive drum 20 is supported by the base frame 46 and the cover frame 47 so as to be rotatable about the axis A extending in the left-right direction. Further, the photosensitive drum 20 is covered from above by a cover upper wall 81 of the cover frame 47.
  • the left end portion 105 of the drum shaft 98 protrudes leftward from the cover left wall 80L, and the right end portion 106 of the drum shaft 98 extends rightward from the fitting convex portion 85. Protrudes toward.
  • Each of the left end portion 105 and the right end portion 106 of the drum shaft 98 functions as an example of a second guided portion.
  • the first interference unit 64 is disposed in the vicinity of the left end portion 105 of the drum shaft 98 in the left-right direction
  • the second interference unit 87 is the right end portion of the drum shaft 98 in the left-right direction. It is arranged in the vicinity of 106. 3.
  • the main body casing 2 includes a pair of main body side walls 100 arranged to face each other with a gap in the left-right direction. As shown in FIG. 1, a cartridge mounting portion 101 is provided.
  • the cartridge mounting unit 101 is configured to mount the process cartridge 15, and is disposed between the rear portion of the sheet feeding unit 3 in the vertical direction and the fixing unit 17 in the rear portion of the main body casing 2. Yes.
  • the cartridge mounting portion 101 is formed in a substantially L shape in a side view extending in the left-right direction, and includes a first mounting portion 102 that is a front portion and a second mounting portion 103 that is a rear portion.
  • the first mounting portion 102 is formed in a substantially rectangular shape in a side view extending in the front-rear direction, and rotatably supports the pickup roller 11 and the paper feed roller 12 at the lower end portion thereof. Further, the upper surface of the first mounting portion 102 is formed along the lower end portion of the process cartridge 15, specifically, the lower surface of the base lower wall 55 corresponding to the developing cartridge housing portion 95.
  • the second mounting portion 103 is formed in a substantially rectangular shape in a side view extending in the vertical direction, and an engagement groove 104 is formed in a substantially central portion in the vertical direction on the front surface.
  • the engagement groove 104 is formed in a substantially curved shape in side view that is recessed rearward from the front surface of the second mounting portion 103, and extends along the rear end portion of the process cartridge 15, specifically, the outer peripheral surface of the base rear wall 56. Is formed.
  • the second mounting portion 103 is disposed on the rear side of the first mounting portion 102 with an interval.
  • the rear surface of the first mounting portion 102 and the portion of the front surface of the second mounting portion 103 facing the first mounting portion 102 form the paper feed path 14 described above.
  • the main body casing 2 is provided with a guide part 110 and a protrusion 111 as an example of a restricting part.
  • the guide portion 110 is provided so as to face each other on each of the pair of left and right main body side walls 100.
  • the guide part 110 includes a drum shaft guide part 112 as an example of a second guide part, a boss guide part 113 as an example of a first guide part, and an example of a contact part.
  • the contact surface 114 is provided.
  • the drum shaft guide portion 112 is formed so as to be recessed from the inner side surface in the left-right direction of the main body side wall 100 toward the outer side in the left-right direction, and is inclined downward from the substantially central portion in the front-rear direction at the upper end portion of the main body side wall 100. It is provided as follows. Further, the rear end portion of the drum shaft guide portion 112 is a substantially central portion in the vertical direction of the rear end portion of the main body side wall 100, and is disposed on the front side of the engagement groove 104 of the second mounting portion 103.
  • the boss guide portion 113 is formed so as to be recessed from the left and right inner side surface of the main body side wall 100 toward the outer side in the left and right direction, and is provided on the front side of the drum shaft guide portion 112 with a space therebetween. And so as to incline backward as it goes downward.
  • the boss guide portion 113 integrally includes an upper first portion 115 and a lower second portion 116.
  • the first portion 115 is provided so as to be inclined downward from the upper end portion of the main body side wall 100 toward the rear so as to have substantially the same inclination as the drum shaft guide portion 112.
  • the second portion 116 is bent so that the downward inclination is larger than that of the first portion 115, and is inclined so as to be inclined backward as it goes downward. That is, each of the drum shaft guide portion 112 and the boss guide portion 113 is provided such that the distance between the drum shaft guide portion 112 and the boss guide portion 113 in the front-rear direction increases toward the downstream side in the mounting direction X, which will be described later. .
  • the second portion 116 is formed in a substantially curved shape in side view that bulges toward the front lower side. Further, the rear end portion of the second portion 116 is disposed in front of the rear end portion of the drum shaft guide portion 112 and on the front upper side of the front end portion of the first mounting portion 102.
  • the contact surface 114 is formed between the drum shaft guide portion 112 and the boss guide portion 113 at the upper end portion of the main body side wall 100, and as shown in FIG.
  • the upper end portion at the rear end edge and the upper end portion at the front end edge of the boss guide portion 113 are formed so as to extend along the front-rear direction.
  • the protrusion 111 is provided on each of the pair of left and right main body side walls 100 so as to coincide with each other when projected in the left-right direction.
  • the protrusion 111 includes a first protrusion 117 provided on the left main body side wall 100 and a second protrusion 118 provided on the right main body side wall 100.
  • the first protrusion 117 is provided on the rear upper portion of the right side surface of the main body side wall 100 corresponding to the first interference portion 64.
  • the first protrusion 117 is formed in a substantially triangular shape in a side view that tapers toward the front, and as shown in FIG. .
  • the second protrusion 118 is provided on the rear upper portion of the left surface of the right side wall 100 corresponding to the stepped portion 90 of the second interference portion 87.
  • the second protrusion 118 is formed in a substantially triangular shape in a side view that tapers toward the front, and protrudes leftward from the left surface of the left main body side wall 100. 4).
  • the top cover 7 of the main casing 2 is placed in the open position.
  • the contact surface 114 is exposed from the front upper side through the cartridge opening 5.
  • the gripping portion 77 of the gripping portion 75 of the drum cartridge 18 is gripped, and the process cartridge 15 is moved to the rear lower side, the left guide boss 65 and the right guide boss 72. Is placed on the front upper side.
  • the left end portion 105 and the right end portion 106 of the drum shaft 98 are directed from the front upper side to the rear lower side with respect to the left guide boss 65 and the right guide boss 72. It is provided downstream in the mounting direction X. Further, the first interference part 64 and the second interference part 87 are provided in the rear lower part of the process cartridge 15, that is, in the downstream part in the mounting direction X.
  • the process cartridge 15 is mounted so that the left end portion 105 and the right end portion 106 of the drum shaft 98 are fitted to the corresponding drum shaft guide portions 112 from the front upper side. It is inserted into the main body casing 2 through the cartridge opening 5 along the direction X.
  • the process cartridge 15 is pushed rearward and downward along the drum shaft guide portion 112. Then, each of the left end portion 105 and the right end portion 106 of the drum shaft 98 is guided by the corresponding drum shaft guide portion 112, and the process cartridge 15 is moved rearward and downward along the mounting direction X. At this time, the drum shaft guide portion 112 guides with reference to the left end portion 105 of the drum shaft 98 as shown in FIG.
  • each of the left guide boss 65 and the right guide boss 72 is fitted to the first portion 115 of the corresponding boss guide portion 113 from the front upper side, as shown in FIGS.
  • the process cartridge 15 is disposed at the guide position where each of the left guide boss 65 and the right guide boss 72 is guided by the corresponding boss guide portion 113.
  • each of the left guide boss 65 and the right guide boss 72 is guided by the corresponding first portion 115 and reaches the lower end portion of the first portion 115.
  • the first interference part 64 passes through the front lower side of the first protrusion 117, and the second interference part 87 passes through the front lower side of the second protrusion 118.
  • the process cartridge 15 is moved rearward and downward along the mounting direction X, and is rotated clockwise in the left side view with the drum shaft 98 as a fulcrum.
  • the drum shaft guide portion 112 guides using the left end portion 105 of the drum shaft 98 as a reference, and the second portion 116 of the boss guide portion 113 guides using the left guide boss 65 as a reference.
  • each of the left end portion 105 and the right end portion 106 of the drum shaft 98 reaches the lower end portion of the corresponding drum shaft guide portion 112, and the left guide boss 65 and right side
  • each of the guide bosses 72 reaches the lower end portion of the corresponding second portion 116, further movement toward the downstream side in the mounting direction X is restricted.
  • the rear end portion of the process cartridge 15 is received from the front side into the engagement groove 104 of the second mounting portion 103 and the lower end portion thereof is supported by the first mounting portion 102 from below.
  • the process cartridge 15 is arranged at the mounting position where the process cartridge 15 is mounted on the cartridge mounting portion 101. That is, the guide unit 110 guides the mounting of the process cartridge 15 on the cartridge mounting unit 101.
  • the top cover 7 is moved from the open position to the closed position, whereby the mounting of the process cartridge 15 on the main casing 2 is completed.
  • the procedure is reversed to the above-described mounting operation.
  • the process cartridge 15 may be inserted into the main body casing 2 by a trajectory different from the mounting trajectory of the process cartridge 15 in the above mounting operation. is there.
  • the user may accidentally move each of the left guide boss 65 and the right guide boss 72 toward the drum shaft guide portion 112 that is different from the corresponding boss guide portion 113.
  • the process cartridge 15 is excessively pushed backward with respect to the main body casing 2.
  • the left guide boss 65 and the right guide boss 72 move to the drum shaft guide portion 112 side.
  • the process cartridge 15 is pushed into the main casing 2 rearward and downward.
  • the first interference portion 64 is engaged with the first protrusion 117 from the upstream side in the mounting direction X as shown in FIG.
  • One protrusion 117 is received.
  • the second interference part 87 receives the second protrusion 118 from the upstream side in the mounting direction X so as to be engaged with the second protrusion 118. That is, as shown in FIGS. 8 and 12, the first interference part 64 and the first protrusion 117 are engaged, and the second interference part 87 and the second protrusion 118 are engaged.
  • the process cartridge 15 is arranged at the restriction position where the further insertion into the main body casing 2 toward the rear lower side is restricted.
  • each of the left guide boss 65 and the right guide boss 72 is in contact with the corresponding contact surface 114 from above. For this reason, the front end portion of the process cartridge 15 is restricted from moving downward, and the process cartridge 15 is restricted from turning clockwise with the drum shaft 98 as a fulcrum.
  • each of the first interference portion 64 and the second interference portion 87 may move in a direction away from each of the first protrusion 117 and the second protrusion 118. It is regulated.
  • the gripping portion 75 protrudes from the cartridge opening portion 5 toward the front upper side as shown in FIGS.
  • the left guide boss 65 and the right guide boss 72 are exposed from the front upper side through the cartridge opening portion 5 while being in contact with the corresponding contact surface 114.
  • the base front wall 57 and the extending portion 76 are arranged along the vertical direction, and each of the left guide boss 65 and the right guide boss 72 has its center axis line. Are arranged so as to be located on the front side of the base front wall 57. Further, the guide surface 79 of the pressed portion 78 is arranged along the direction connecting the rear lower part and the front upper part.
  • the lower end portion of the inclined surface 43 of the pressing portion 10 comes into contact with the upper end portion of the extending portion 76 of the grip portion 75 from the rear upper side, and the lower end portion of the pressing portion 10 is the guide surface 79 of the pressed portion 78. Abut from above.
  • the inclined surface 43 of the pressing portion 10 presses the upper end portion of the extending portion 76 of the gripping portion 75 forward and downward, and the pressing portion 10.
  • the lower end portion of the member presses the guide surface 79 of the pressed portion 78 toward the front lower side.
  • the front end of the process cartridge 15 is moved forward and the rear end thereof is moved forward and upward. That is, the guide surface 79 of the pressed portion 78 moves the process cartridge 15 from the restriction position toward the guide position.
  • the second interference part 87 is moved toward the front upper side, and the engagement between the second interference part 87 and the second protrusion 118 is released.
  • the first interference portion 64 is similarly moved toward the front upper side, and the engagement between the first interference portion 64 and the first protrusion 117 is released.
  • the process cartridge 15 is moved from the restriction position to the guide position where the left guide boss 65 and the right guide boss 72 are guided by the corresponding boss guide portions 113.
  • the pressing portion 10 presses the guide surface 79 of the pressed portion 78 of the grip portion 75 toward the front lower side.
  • the process cartridge 15 is moved rearward and downward along the mounting direction X as the top cover 7 is rotated, and is rotated clockwise in the left side view with the drum shaft 98 as a fulcrum. .
  • the left end portion 105 and the right end portion 106 of the drum shaft 98 reach the lower end portion of the corresponding drum shaft guide portion 112 and the left side.
  • the guide boss 65 and the right guide boss 72 reach the lower end of the corresponding second portion 116.
  • the process cartridge 15 is disposed at a mounting position where the process cartridge 15 is mounted on the cartridge mounting portion 101 as indicated by a virtual line.
  • the main body casing 2 has a guide portion 110 as shown in FIG. 9. Therefore, as shown in FIGS. 11 and 14, when the process cartridge 15 is mounted on the cartridge mounting portion 101, the process cartridge 15 is guided by the guide portion 110. As a result, the mounting operation of the process cartridge 15 on the cartridge mounting portion 101 can be facilitated.
  • the main body casing 2 has a protrusion 111
  • the process cartridge 15 has a first interference portion 64 and a second interference portion 87. Therefore, when the process cartridge 15 is inserted into the main body casing 2 along a trajectory different from the mounting trajectory, each of the first interference portion 64 and the second interference portion 87 and the corresponding protrusion 111, specifically, the first protrusion 117 and the second protrusion 118 engage with each other, and further insertion of the process cartridge 15 into the main body casing 2 is restricted. As a result, erroneous insertion of the process cartridge 15 into the main casing 2 can be suppressed.
  • the first interference part 64 is the first protrusion.
  • the movement of the second interference portion 87 in a direction away from the second protrusion 118 from 117 is restricted by the left guide boss 65 and the right guide boss 72 coming into contact with the corresponding contact surface 114.
  • the process cartridge 15 is restricted by the left guide boss 65 and the right guide boss 72 from moving downward at the front end thereof.
  • each of the first interference part 64 and the second interference part 87 and each of the first protrusion 117 and the second protrusion 118 are reliably brought into contact with each other when inserted into the main body casing 2 along a path different from the mounting path. be able to.
  • the guide part 110 is arranged such that when the process cartridge 15 is mounted on the cartridge mounting part 101, the left end part of the process cartridge 15, specifically, the left end part 105 of the drum shaft 98.
  • the left guide boss 65 is used as a reference. Therefore, since the guide part 110 can reliably guide the left end part of the process cartridge 15, a stable mounting operation of the process cartridge 15 can be ensured.
  • the left-right direction length L2 of the 2nd interference part 87 is formed longer than the left-right direction length L1 of the 1st interference part 64, as shown in FIG.
  • the process cartridge 15 is mounted on the cartridge mounting portion 101. Even if a relatively large backlash occurs at the right end portion of the process cartridge 15, the second interference portion 87 and the protrusion 111 can be reliably brought into contact with each other.
  • the second interference portion 87 is provided on an electrode cover 84 which is a separate member from the drum frame 45, and the electrode cover 84 having the second interference portion 87 is a drum frame. 45. Therefore, as shown in FIG. 12, it is possible to suppress an impact when the second interference portion 87 and the protrusion 111 are in contact with each other, and thus to the drum frame 45 that houses the photosensitive drum 20. Can be suppressed. For this reason, it is possible to suppress a decrease in the positional accuracy of the photosensitive drum 20 with respect to the drum frame 45.
  • the drum frame 45 includes a base frame 46 and a cover frame 47 assembled to the base frame 46 as shown in FIG.
  • an electrode holding portion 86 that supports the second interference portion 87 is provided on the cover right wall 80R of the cover frame 47.
  • the impact caused by the contact between the second interference part 87 and the protrusion 111 acts on the electrode holding part 86 via the second interference part 87.
  • the electrode holding portion 86 is reinforced, it is possible to prevent the electrode holding portion 86 from being deformed even if an impact due to contact between the second interference portion 87 and the protrusion 111 acts on the electrode holding portion 86.
  • the second interference portion 87 since the electrode holding portion 86 is reinforced, even if an unintended external force is applied to the right end portion of the process cartridge 15 when the process cartridge 15 is attached to the cartridge attachment portion 101, the second interference portion 87. It is possible to reliably suppress the electrode holding portion 86 from being deformed by an impact caused by contact between the first protrusion 118 and the second protrusion 118.
  • the cover frame 47 supports the scorotron charger 22 as shown in FIG. Further, as shown in FIG. 2, a first interference portion 64 is provided on the drum accommodating portion side wall 60 of the base frame 46.
  • the second interference portion 87 is supported by the electrode holding portion 86.
  • the electrode holding portion 86 is reinforced and the deformation is suppressed, the second interference portion 87 and the protrusion 111. It is possible to suppress the relative positional accuracy between the scorotron charger 22 and the photosensitive drum 20 from being reduced due to an impact when they contact each other.
  • the base right wall 54R is configured to have greater rigidity than the base left wall 54L.
  • the process cartridge 15 has a left guide boss 65 and a right guide boss 72 as shown in FIGS. Further, each of the pair of left and right main body side walls 100 of the main body casing 2 has a contact surface 114 as shown in FIG.
  • the left guide boss 65 and the right guide boss 72 are in contact with the corresponding contact surface 114, so that the process cartridge 15 It is possible to reliably regulate the movement of the front end of the lower portion toward the lower side. (9) Further, as shown in FIG. 5, the contact surface 114 is exposed from the front upper side through the cartridge opening 5. Therefore, in the state where the process cartridge 15 is disposed at the restriction position, as shown in FIG. 6, the left guide boss 65 and the right guide boss 72 that abut against the corresponding abutment surface 114 are connected via the cartridge opening 5. It is exposed from the front upper side.
  • the user can easily confirm that each of the left guide boss 65 and the right guide boss 72 and the corresponding contact surface 114 are in contact with each other, and the process cartridge 15 has a main body casing with a track different from the mounting track. 2 can be easily grasped.
  • the first interference portion 64 and the second interference portion 87 are downstream in the mounting direction X of the process cartridge 15 during the mounting operation of the process cartridge 15 with respect to the main body casing 2. It is provided in the side part.
  • each of the first interference portion 64 and the second interference portion 87 and the first protrusion 117 are inserted.
  • Each of the second protrusions 118 comes into contact with the second protrusion 118, and the process cartridge 15 is disposed at the restriction position.
  • the process cartridge 15 when the process cartridge 15 is erroneously inserted into the main casing 2, the movement of the process cartridge 15 can be regulated at an early stage. (11) Further, as shown in FIGS. 2 and 3, the process cartridge 15 has a gripping portion 75.
  • the gripping portion 75 can be gripped, and the attachment / detachment work of the process cartridge 15 to the cartridge mounting portion 101 can be facilitated.
  • the grip portion 75 protrudes from the cartridge opening portion 5 toward the front upper side in a state where the process cartridge 15 is disposed at the restriction position.
  • the process cartridge 15 arranged at the restriction position can be easily detached from the main casing 2 by grasping the grasping portion 75.
  • the main body casing 2 has the top cover 7, as shown in FIG. 9 and FIG. The top cover 7 is restricted from moving from the open position to the closed position in a state where the process cartridge 15 is disposed at the restriction position.
  • the top cover 7 is provided with a pressing portion 10 as shown in FIGS. 10 and 13.
  • the pressing portion 10 presses the grip portion 75 of the process cartridge 15, and the left guide boss 65 and the right guide boss 72 correspond to the corresponding boss guide. It moves toward the part 113.
  • the process cartridge 15 is moved from the restriction position toward the guide position.
  • the pressed portion 78 has a guide surface 79 as shown in FIGS.
  • the guide surface 79 is pressed against the lower end portion of the pressing portion 10. Thereby, the process cartridge 15 can be reliably moved from the restriction position toward the guide position.
  • the left guide boss 65 and the right guide boss 72 are formed in a substantially cylindrical shape extending in the left-right direction, as shown in FIGS.
  • the process cartridge 15 has a drum shaft 98 extending in the left-right direction.
  • each of the left end portion 105 and the right end portion 106 of the drum shaft 98 is guided by the corresponding drum shaft guide portion 112. Therefore, it is possible to further facilitate the mounting operation of the process cartridge 15 on the cartridge mounting portion 101.
  • each of the first interference unit 64 and the second interference unit 87 and each of the left end portion 105 and the right end portion 106 of the drum shaft 98 are disposed in the vicinity in the left-right direction.
  • the relative positional relationship between the first interference portion 64 and the left end portion 105 of the drum shaft 98 can be kept constant, and the relative positional relationship between the second interference portion 87 and the right end portion 106 of the drum shaft 98. Can be kept constant.
  • each of the first interference unit 64 and the second interference unit 87 is inserted into the main body casing 2 along a track different from the mounting track.
  • Each of the first protrusion 117 and the second protrusion 118 is received from the upstream side in the mounting direction X. Therefore, each of the 1st interference part 64 and the 2nd interference part 87, and each of the 1st protrusion 117 and the 2nd protrusion 118 can be engaged reliably.
  • the printer 1 described above is an embodiment of the image forming apparatus of the present invention, and the present invention is not limited to the above-described embodiment.
  • the image forming apparatus of the present invention can be configured as a color printer in addition to the above-described monochrome printer.
  • the image forming apparatus When the image forming apparatus is configured as a color printer, the image forming apparatus includes a direct tandem type color printer including a plurality of photosensitive drums and a recording medium conveying member, a plurality of photosensitive drums, an intermediate transfer member, and a transfer member. It can be configured as an intermediate transfer type tandem color printer.
  • process cartridge 15 may be configured as an integral type integrally including the drum cartridge 18 and the developing cartridge 19 in addition to the separation type in which the drum cartridge 18 and the developing cartridge 19 are separated as described above.
  • the developing cartridge 19 corresponds to an example of the cartridge.
  • the photosensitive drum 20 is an example of a rotating body.
  • the rotating body includes a photosensitive member such as the photosensitive drum 20 and a roller member such as a developing roller 34 and a supply roller 33. It is.
  • the developing roller 34 provided in the developing cartridge 19 corresponds to an example of the rotating body.
  • the above-described printer 1 can be configured as a multi-function machine equipped with an image reading unit and the like.

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  • Computer Vision & Pattern Recognition (AREA)
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  • Electrophotography Configuration And Component (AREA)

Abstract

La présente invention concerne un dispositif de formation d'image conçu de sorte à permettre de réduire des erreurs dans l'insertion d'une cartouche dans le corps principal de dispositif. Dans une imprimante (1), lorsqu'une cartouche de traitement (15) qui comporte une première partie d'interférence (64) et une seconde partie d'interférence (87) est insérée dans un boîtier de corps (2) par un chemin qui est différent d'un chemin de montage, la première partie d'interférence (64) et la seconde partie d'interférence (87) viennent en contact avec des saillies (111) qui sont disposées au niveau du boîtier de corps (2). Lorsque la première partie d'interférence (64) et la seconde partie d'interférence (87) viennent en contact avec les saillies (111) correspondantes, la cartouche de traitement (15) présente un déplacement restreint dans une première direction dans laquelle la première partie d'interférence (64) et la seconde partie d'interférence (87) se séparent des saillies (111) correspondantes.
PCT/JP2012/081128 2012-11-20 2012-11-30 Dispositif de formation d'image WO2014080540A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201290001307.8U CN204925625U (zh) 2012-11-20 2012-11-30 图像形成设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012254790A JP2014102405A (ja) 2012-11-20 2012-11-20 画像形成装置
JP2012-254790 2012-11-20

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WO2014080540A1 true WO2014080540A1 (fr) 2014-05-30

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JP (1) JP2014102405A (fr)
CN (1) CN204925625U (fr)
WO (1) WO2014080540A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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JPH08179626A (ja) * 1994-12-26 1996-07-12 Canon Inc プロセスカートリッジ及び画像形成装置
JPH08297453A (ja) * 1995-04-26 1996-11-12 Canon Inc 着脱ガイド部材及び画像形成装置
JPH10222041A (ja) * 1996-12-03 1998-08-21 Canon Inc プロセスカートリッジ及び電子写真画像形成装置
JP2000132069A (ja) * 1998-10-28 2000-05-12 Canon Inc プロセスカートリッジ及び電子写真画像形成装置及び帯電ローラ取り付け方法
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