Patent Publication Number: US-11656575-B2

Title: Image forming device

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application is a continuation of U.S. patent application Ser. No. 17/518,965, filed Nov. 4, 2021, which is a continuation of U.S. patent application Ser. No. 17/003,167, filed Aug. 26, 2020, which claims priority from Japanese Patent Application No. 2019-159905, which was filed on Sep. 2, 2019, and which applications are incorporated herein by reference. To the extent appropriate, a claim of priority is made to each of the above disclosed applications. 
    
    
     BACKGROUND 
     Technical Field 
     The following disclosure relates to an image forming device. 
     Description of Related Art 
     An image forming device conventionally includes a device housing, a drawer, and a process cartridge. The drawer is movable between an inside position at which the drawer is located inside the device housing and an outside position at which the drawer is located outside the device housing. The process cartridge is mountable on the drawer. The process cartridge includes a photoconductive drum and a developer roller. The process cartridge is capable of storing toner. 
     SUMMARY 
     The process cartridge of the known image forming device includes the photoconductive drum and the developer roller as described above. 
     When the amount of the toner remaining in the process cartridge of the known image forming device is reduced, for instance, the entirety of the process cartridge including the photoconductive drum needs to be replaced even though the photoconductive drum need not be replaced. It is thus difficult to achieve cost reduction. 
     Accordingly, one aspect of the present disclosure is directed to an image forming device including a drawer in which (a) a drum cartridge including a photoconductive drum and a developer roller and (b) a toner cartridge storing toner can be replaced independently of each other. 
     In one aspect of the present disclosure, an image forming device includes: a housing; a drawer movable between an inside position at which the drawer is located inside the housing and an outside position at which the drawer is located outside the housing; a drum cartridge including a photoconductive drum and a developer roller and mountable on the drawer; a toner cartridge storing toner to be supplied to the developer roller and mountable on the drawer, wherein the drawer includes a first guide that guides the toner cartridge in mounting the toner cartridge on the drawer, and wherein the drum cartridge includes a second guide connected to the first guide in a state in which the drum cartridge is mounted on the drawer, the second guide being configured to guide the toner cartridge in mounting the toner cartridge on the drawer in the state in which the drum cartridge is mounted on the drawer. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The objects, features, advantages, and technical and industrial significance of the present disclosure will be better understood by reading the following detailed description of an embodiment, when considered in connection with the accompanying drawings, in which: 
         FIG.  1    is a schematic view of an image forming device according to one embodiment; 
         FIG.  2    is an explanatory view for explaining a movement of a drawer, the view illustrating a state in which the drawer of  FIG.  1    is located at an outside position; 
         FIG.  3    is an explanatory view for explaining mounting of a drum cartridge on the drawer, the view illustrating a state in which the drum cartridge and a toner cartridge are detached from the drawer of  FIG.  2   ; 
         FIG.  4    is an explanatory view for explaining mounting of the toner cartridge on the drawer, the view illustrating a state in which the drum cartridge is mounted on the drawer of  FIG.  3   ; 
         FIG.  5    is a plan view of the drawer of  FIG.  1   ; 
         FIG.  6    is a cross-sectional view of the drawer taken along line A-A in  FIG.  5   ; 
         FIG.  7    is a plan view of the drum cartridge of  FIG.  1   ; 
         FIG.  8 A  is a cross-sectional view of the drum cartridge taken along line B-B in  FIG.  7   , the view illustrating a state in which a shutter is located at a closing position; 
         FIG.  8 B  is a view of the drum cartridge of  FIG.  8 A  illustrating a state in which the shutter is located at an open position; 
         FIG.  9 A  is a side view of the drum cartridge of  FIG.  7   ; 
         FIG.  9 B  is a side view of the drum cartridge of  FIG.  7    viewed in a direction opposite to a direction viewed in  FIG.  9 A ; 
         FIG.  10 A  is a cross-sectional view of the drum cartridge taken along line C-C in  FIG.  7   , the view illustrating the state in which the shutter is located at the closing position; 
         FIG.  10 B  is a view of the drum cartridge of  FIG.  10 A  illustrating the state in which the shutter is located at the open position; 
         FIG.  11    is a plan view of the toner cartridge in a state illustrated in  FIG.  4    in which a shutter is located at a closing position; 
         FIG.  12 A  is a cross-sectional view of the toner cartridge taken along line D-D in  FIG.  11   , the view illustrating a state in which the shutter is located at the closing position; 
         FIG.  12 B  is a view of the toner cartridge of  FIG.  12 A  illustrating a state in which the shutter is located at an open position; 
         FIG.  13 A  is a cross-sectional view of the toner cartridge taken along line E-E in  FIG.  11   , the view illustrating the state in which the shutter is located at the closing position; 
         FIG.  13 B  is a view of the toner cartridge of  FIG.  13 A  illustrating the state in which the shutter is located at the open position; 
         FIG.  14    is a side view of the toner cartridge of  FIG.  11   ; 
         FIG.  15    is an explanatory view for explaining a modification; and 
         FIG.  16    is an explanatory view for explaining the modification of  FIG.  15   . 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENT 
     1. Image Forming Device  1   
     Referring to  FIGS.  1 - 4   , there will be explained an image forming device  1  according to one embodiment. 
     As shown in  FIG.  1   , the image forming device  1  includes a housing  2 , a sheet supplier  3 , a drawer  4 , a drum cartridge  5 , a toner cartridge  6 , an exposure device  7 , a transfer roller  8 , and a fixing device  9 . The image forming device  1  is for monochrome printing. Thus, the image forming device  1  includes one drum cartridge  5  and one toner cartridge  6 . 
     1.1 Housing  2   
     The housing  2  houses the sheet supplier  3 , the drawer  4 , the drum cartridge  5 , the toner cartridge  6 , the exposure device  7 , the transfer roller  8 , and the fixing device  9 . As shown in  FIGS.  1  and  2   , the housing  2  has an opening  2 A. The housing  2  includes a cover  2 B. 
     The cover  2 B is movable between a closed position ( FIG.  1   ) and an open position ( FIG.  2   ). In a state in which the cover  2 B is located at the closed position, the cover  2 B closes the opening  2 A. In a state in which the cover  2 B is located at the open position, the cover  2 B opens the opening  2 A. 
     1.2 Sheet Supplier  3   
     As shown in  FIG.  1   , the sheet supplier  3  is capable of supplying sheets S to the photoconductive drum  10 . The photoconductive drum  10  will be later explained. The sheet supplier  3  includes a sheet cassette  3 A, a pickup roller  3 B, a conveying roller  3 C, a multi-purpose tray  3 D, a pickup roller  3 E, a conveying roller  3 F, and a conveying roller  3 G. 
     The sheet cassette  3 A is capable of storing the sheets S. The pickup roller  3 B picks up an uppermost one of the sheets S stacked on the sheet cassette  3 A. The pickup roller  3 B conveys the picked-up sheet S toward the conveying roller  3 C. The conveying roller  3 C conveys the sheet S conveyed from the pickup roller  3 B toward the conveying roller  3 G. 
     A sheet S can be placed on the multi-purpose tray  3 D. The pickup roller  3 E picks up the sheet S on the multi-purpose tray  3 D and conveys the picked-up sheet S toward the conveying roller  3 F. The conveying roller  3 F conveys the sheet S from the pickup roller  3 E toward the conveying roller  3 G. 
     The conveying roller  3 G conveys, toward the photoconductive drum  10 , the sheet S from the conveying roller  3 C or the sheet S from the conveying roller  3 F. 
     1.3 Drawer  4   
     As shown in  FIGS.  1  and  2   , the drawer  4  is movable in a first direction between an inside position ( FIG.  1   ) and an outside position ( FIG.  2   ). The first direction intersects an up-down direction. The drawer  4  inclines downward in a direction directed from the inside position toward the outside position. 
     Specifically, the housing  2  includes a guide  2 C ( FIG.  2   ). The guide  2 C is one example of “fourth guide”. The guide  2 C guides the drawer  4 . The guide  2 C extends in the first direction. The guide  2 C includes a first end portion E 1  and a second end portion E 2 . The second end portion E 2  is apart from the first end portion E 1  in the first direction. The second end portion E 2  is located between the first end portion E 1  and the cover  2 B in the first direction. 
     As shown in  FIG.  1   , the inside position is a position at which a guided portion  22 A (FIG.  5 ) of the drawer  4  engages the first end portion E 1  of the guide  2 C. The guided portion  22 A will be later explained. In a state in which the drawer  4  is located at the inside position, the entirety of the drawer  4  is located inside the housing  2 . As shown in  FIG.  2   , the outside position is a position at which a guided portion  23 A ( FIG.  5   ) of the drawer  4  engages the second end portion E 2  of the guide  2 C. The guided portion  23 A will be later explained. In a state in which the drawer  4  is located at the outside position, at least a part of the drawer  4  is located outside the housing  2 . 
     1.4 Drum Cartridge  5   
     As shown in  FIGS.  3  and  4   , the drum cartridge  5  is mountable on the drawer  4  in the state in which the drawer  4  is located at the outside position. As shown in  FIG.  4   , at least a part of the drum cartridge  5  is located inside the housing  2  in a state in which the drum cartridge  5  is mounted on the drawer  4  and the drawer  4  is located at the outside position. As shown in  FIG.  1   , the drum cartridge  5  includes a photoconductive drum  10 , a charging roller  11 , and a developer device  12 . 
     The photoconductive drum  10  is rotatable about an axis A 1  that extends in a second direction. The second direction intersects the first direction and the up-down direction. Preferably, the second direction is orthogonal to the first direction and the up-down direction. The photoconductive drum  10  extends in the second direction and has a cylindrical shape. The photoconductive drum  10  is located inside the housing  2  in the state in which the drum cartridge  5  is mounted on the drawer  4  and the drawer  4  is located at the outside position ( FIG.  2   ). 
     The charging roller  11  causes the surface of the photoconductive drum  10  to be charged. The charging roller  11  is in contact with the surface of the photoconductive drum  10 . The drum cartridge  5  may include a scorotron charging device in place of the charging roller  11 . 
     The developer device  12  is capable of supplying the toner to the photoconductive drum  10 . Specifically, the developer device  12  includes a developer housing  12 A and a developer roller  12 B. That is, the drum cartridge  5  includes the developer housing  12 A and the developer roller  12 B. 
     The developer housing  12 A stores the toner to be supplied to the photoconductive drum  10 . The developer housing  12 A supports the developer roller  12 B. The developer housing  12 A is located inside the housing  2  in the state in which the drum cartridge  5  is mounted on the drawer  4  and the drawer  4  is located at the outside position ( FIG.  4   ). 
     The developer roller  12 B is rotatable about an axis A 2  that extends in the second direction. The developer roller  12 B is in contact with the photoconductive drum  10 . The developer roller  12 B is capable of supplying the toner in the developer housing  12 A to the photoconductive drum  10 . 
     1.5 Toner Cartridge  6   
     The toner cartridge  6  stores the toner to be supplied to the developer device  12 . In other words, the toner cartridge  6  stores the toner to be supplied to the developer roller  12 B. As shown in  FIGS.  2  and  4   , the toner cartridge  6  is mountable on the drawer  4  in the state in which the drawer  4  is located at the outside position. Specifically, the toner cartridge  6  is mountable on the drawer  4  in the state in which the drawer  4  is located at the outside position and the drum cartridge  5  is mounted on the drawer  4 . 
     1.6 Exposure Device  7   
     As shown in  FIG.  1   , the exposure device  7  is capable of exposing the surface of the photoconductive drum  10  in a state in which the drum cartridge  5  and the toner cartridge  6  are mounted on the drawer  4  and the drawer  4  is located at the inside position. Specifically, the exposure device  7  is a laser scanning unit. 
     The exposure device  7  exposes the surface of the photoconductive drum  10  in the state in which the surface of the photoconductive drum  10  is charged by the charging roller  11 , so that a latent image is formed on the surface of the photoconductive drum  10 . The developer device  12  supplies the toner onto the surface of the photoconductive drum  10  in the state in which the latent image is formed on the surface of the photoconductive drum  10 , so that a toner image is formed on the surface of the photoconductive drum  10 . 
     1.7 Transfer Roller  8   
     The transfer roller  8  is in contact with the photoconductive drum  10  in the state in which the drawer  4 , on which the drum cartridge  5  is mounted, is located at the inside position. The sheet S conveyed by the conveying roller  3 G passes between the transfer roller  8  and the photoconductive drum  10 . In this instance, the transfer roller  8  transfers, onto the sheet S, the toner image formed on the surface of the photoconductive drum  10 . 
     1.8 Fixing Device  9   
     The fixing device  9  heats and pressurizes the sheet S onto which the toner image has been transferred, so as to fix the toner image on the sheet S. The sheet S that has passed the fixing device  9  is discharged onto an upper surface of the housing  2 . 
     2. Details of Drawer  4   
     Referring next to  FIGS.  5  and  6   , the drawer  4  will be explained. 
     As shown in  FIG.  5   , the drawer  4  is shaped like a tray. The drawer  4  extends in the first direction and the second direction. The drawer  4  includes a first end portion in the second direction and a second end portion that is apart from the first end portion in the second direction. The drawer  4  includes side plates  21 A,  21 B, the guided portions  22 A,  23 A, guided portions  22 B,  23 B, a bottom plate  24 , and a drawer grip  25 . 
     2.1 Side Plate  21 A 
     The side plate  21 A is located at the first end portion of the drawer  4  in the second direction. The side plate  21 A extends in the first direction. The side plate  21 A includes a first end portion E 11  and a second end portion E 12  in the first direction. The second end portion E 12  is apart from the first end portion E 11  in the first direction. The side plate  21 A includes a first surface S 1  and a second surface S 2  in the second direction. The second surface S 2  is located between the first surface S 1  and the side plate  21 B in the second direction. 
     As shown in  FIG.  5    and  FIG.  6   , the side plate  21 A includes a guide  26 A (as one example of “first guide”), a guide  27 A (as one example of “third guide”), a receiving portion  28 A, a receiving portion  29 A, and a locking portion  30 A. That is, the drawer  4  includes the guide  26 A, the guide  27 A, and the locking portion  30 A. 
     2.1.1 Guide  26 A 
     As shown in  FIG.  5   , the guide  26 A is provided on the second surface S 2  of the side plate  21 A. 
     As shown in  FIG.  6   , the guide  26 A extends in the first direction. The guide  26 A inclines with respect to the first direction. The guide  26 A gets closer to the bottom plate  24  as the guide  26 A gets closer to the second end portion E 12  of the side plate  21 A. The guide  26 A includes a first end portion  261  and a second end portion  262 . The first end portion  261  is located between the first end portion E 11  and the second end portion E 12  of the side plate  21 A in the first direction. The second end portion  262  is located between the first end portion  261  and the second end portion E 12  of the side plate  21 A in the first direction. The guide  26 A guides a side plate  311 A ( FIG.  8 A ) of the drum cartridge  5  in mounting the drum cartridge  5  on the drawer  4  ( FIGS.  3  and  4   ). The side plate  311 A will be later explained. The guide  26 A guides a guided portion  46 A ( FIG.  11   ) of the toner cartridge  6  in mounting the toner cartridge  6  on the drawer  4  ( FIGS.  2  and  4   ). The guided portion  46 A (as one example of “protrusion”) will be later explained. 
     2.1.2 Guide  27 A 
     As shown in  FIG.  6   , the guide  27 A is provided at an edge of the side plate  21 A. The guide  27 A may be provided on the second surface S 2  of the side plate  21 A. The guide  27 A extends in the first direction and inclines with respect to the first direction. The guide  27 A gets closer to the bottom plate  24  as the guide  27 A gets closer to the second end portion E 12 . The guide  27 A includes a first end portion  271  and a second end portion  272 . The first end portion  271  is located between the first end portion E 11  and the second end portion E 12  of the side plate  21 A in the first direction. The first end portion  271  is located between the first end portion  261  and the second end portion  262  of the guide  26 A in the first direction. The second end portion  272  is located between the first end portion  271  and the second end portion E 12  of the side plate  21 A in the first direction. The second end portion  272  is located between the second end portion  262  of the guide  26 A and the second end portion E 12  of the side plate  21 A in the first direction. The guide  27 A guides a guided portion  32 A ( FIG.  7   ) of the drum cartridge  5  in mounting the drum cartridge  5  on the drawer  4  ( FIGS.  3  and  4   ). According to this arrangement, the guide  27 A guides the photoconductive drum  10  via the guided portion  32 A in mounting the drum cartridge  5  on the drawer  4 . The guided portion  32 A will be later explained. 
     As shown in  FIG.  5   , the guide  27 A is located opposite to the side plate  21 B with respect to the guide  26 A in the second direction. In other words, the guide  26 A is located between the guide  27 A and the side plate  21 B in the second direction. The guide  27 A is located between the guide  26 A and the guided portion  22 A in the second direction. 
     2.1.3 Receiving Portion  28 A 
     As shown in  FIG.  6   , the receiving portion  28 A is located between the guide  26 A and the second end portion E 12  of the side plate  21 A in the first direction. In the state in which the drum cartridge  5  is mounted on the drawer  4  ( FIG.  4   ), the receiving portion  28 A receives the side plate  311 A ( FIG.  7   ) of the drum cartridge  5 . 
     2.1.4 Receiving Portion  29 A 
     The receiving portion  29 A is located between the guide  27 A and the second end portion E 12  of the side plate  21 A in the first direction. In the state in which the drum cartridge  5  is mounted on the drawer  4  ( FIG.  4   ), the receiving portion  28 A receives the guided portion  32 A ( FIG.  7   ) of the drum cartridge  5 . 
     As shown in  FIG.  5   , the receiving portion  29 A is located opposite to the side plate  21 B with respect to the receiving portion  28 A in the second direction. In other words, the receiving portion  28 A is located between the receiving portion  29 A and the side plate  21 B in the second direction. 
     2.1.5 Locking Portion  30 A 
     As shown in  FIG.  6   , the locking portion  30 A is provided at the edge of the side plate  21 A. The locking portion  30 A may be provided on the second surface S 2  of the side plate  21 A. The locking portion  30 A is located between the first end portion  271  of the guide  27 A and the second end portion  272  of the guide  27 A in the first direction. The locking portion  30 A is a groove. The locking portion  30 A includes a protrusion  301 . The protrusion  301  is located in the locking portion  30 A. The protrusion  301  may be a plate spring. 
     As shown in  FIG.  5   , the locking portion  30 A is located opposite to the side plate  21 B with respect to the guide  26 A in the second direction. The locking portion  30 A is located between the guide  26 A and the guided portion  22 A in the second direction. 
     2.2 Side Plate  21 B 
     As shown in  FIG.  5   , the side plate  21 B is located at the second end portion of the drawer  4  in the second direction. The side plate  21 B is apart from the side plate  21 A in the second direction. The side plate  21 B extends in the first direction. The side plate  21 B includes a guide  26 B, a guide  27 B, a receiving portion  28 B, a receiving portion  29 B, and a locking portion  30 B. The above explanation of the side plate  21 A is true of the side plate  21 B. Thus, explanation of the side plate  21 B is dispensed with. 
     2.3 Guided Portions  22 A,  22 B 
     As shown in  FIG.  6   , the guided portion  22 A is located between the second end portion E 12  of the side plate  21 A and the locking portion  30 A in the first direction. The guided portion  22 A is located between the receiving portion  29 A and the locking portion  30 A in the first direction. 
     As shown in  FIG.  5   , the guided portion  22 A is located opposite to the side plate  21 B with respect to the side plate  21 A in the second direction. The guided portion  22 A is located on the first surface S 1  of the side plate  21 A. The guided portion  22 A is a protrusion. The guided portion  22 A extends from the first surface S 1  of the side plate  21 A. The guided portion  22 A may be attached to the first surface S 1  of the side plate  21 A. The guided portion  22 A has a cylindrical shape. The guided portion  22 A engages the guide  2 C ( FIG.  1   ) of the housing  2 . The guided portion  22 A is guided by the guide  2 C. 
     The guided portion  22 B is located opposite to the side plate  21 A with respect to the side plate  21 B in the second direction. The guided portion  22 B is apart from the guided portion  22 A in the second direction. When projected in the second direction, the guided portion  22 B completely overlaps the guided portion  22 A. The above explanation of the guided portion  22 A is true of the guided portion  22 B. Thus, explanation of the guided portion  22 B is dispensed with. 
     2.4 Guided Portions  23 A,  23 B 
     As shown in  FIG.  6   , the guided portion  23 A is apart from the guided portion  22 A in the first direction. The guided portion  23 A is located between the guided portion  22 A and the locking portion  30 A in the first direction. 
     As shown in  FIG.  5   , the guided portion  23 A is located opposite to the side plate  21 B with respect to the side plate  21 A in the second direction. The guided portion  23 A is located on the first surface S 1  of the side plate  21 A. The guided portion  23 A is a protrusion. The guided portion  23 A extends from the first surface S 1  of the side plate  21 A. The guided portion  23 A may be attached to the first surface S 1  of the side plate  21 A. The guided portion  23 A has a cylindrical shape. The guided portion  23 A engages the guide  2 C ( FIG.  1   ) of the housing  2 . The guided portion  23 A is guided by the guide  2 C. 
     The guided portion  23 B is located opposite to the guided portion  23 A with respect to the side plate  21 B in the second direction. The guided portion  23 B is apart from the guided portion  23 A in the second direction. When projected in the second direction, the guided portion  23 B completely overlaps the guided portion  23 A. The above explanation of the guided portion  23 A is true of the guided portion  23 B. Thus, explanation of the guided portion  23 B is dispensed with. 
     2.5 Bottom Plate  24   
     The bottom plate  24  is located between the side plate  21 A and the side plate  21 B in the second direction. The bottom plate  24  extends in the first direction and the second direction. The bottom plate  24  is connected to the side plate  21 A and the side plate  21 B. 
     2.6 Drawer Grip  25   
     The drawer grip  25  is configured to be gripped by a user when the user moves the drawer  4  between the inside position and the outside position. The drawer grip  25  is located at one end of the drawer  4  in the first direction. The drawer grip  25  extends in the second direction. The drawer grip  25  includes a first end portion and a second end portion in the second direction. The first end portion of the drawer grip  25  is connected to the first end portion E 11  of the drawer side plate  21 A, and the second end portion of the drawer grip  25  is connected to the first end portion of the drawer side plate  21 B. 
     3. Details of Drum Cartridge  5   
     Referring next to  FIGS.  7  and  10 B , the drum cartridge  5  will be explained. 
     As shown in  FIG.  7   , the drum cartridge  5  extends in the second direction. The drum cartridge  5  includes a first end portion in the second direction and a second end portion that is apart from the first end portion in the second direction. The drum cartridge  5  includes a frame  31 , the guided portions  32 A,  32 B, locking protrusions  33 A,  33 B, a seal  34  ( FIG.  8 A ), a shutter  35  ( FIG.  8 A ), a drum cleaner  36 , and a waste-toner conveyor pipe  37 , in addition to the photoconductive drum  10 , the charging roller  11  ( FIG.  1   ), and the developer device  12  ( FIG.  1   ). The shutter  35  is one example of “second shutter”. 
     3.1 Frame  31   
     The frame  31  supports the photoconductive drum  10 , the charging roller  11 , the developer device  12 , the shutter  35 , and the drum cleaner  36 . In the state in which the drum cartridge  5  is mounted on the drawer  4  and the drawer  4  is located at the outside position ( FIG.  2   ), at least a part of the frame  31  is located inside the housing  2 . The frame  31  includes side plates  311 A,  311 B and a connection portion  312 . 
     3.1.1 Side Plate  311 A 
     The side plate  311 A is located at the first end portion of the drum cartridge  5  in the second direction. The side plate  311 A extends in a direction that intersects the axis A 1 , preferably, in a direction orthogonal to the axis A 1 . Specifically, the side plate  311 A extends in the first direction in the state in which the drum cartridge  5  is mounted on the drawer  4 . The side plate  311 A includes a first surface S 11  and a second surface S 12  in the second direction. The second surface S 12  is located between the first surface S 11  and the side plate  311 B in the second direction. The side plate  311 A has a guide  313 A ( FIG.  8 A ), an aperture  314 A ( FIG.  7   ), an aperture  315 A ( FIG.  9 A ), and an aperture  316 A ( FIG.  9 A ). In other words, the drum cartridge  5  includes the guide  313 A. The guide  313 A is one example of “second guide”. 
     3.1.1.1 Guide  313 A 
     As shown in  FIGS.  7  and  8 A , the guide  313 A is provided on the second surface S 12  of the side plate  311 A. The guide  313 A is located opposite to the photoconductive drum  10  with respect to the shutter  35  in the first direction. 
     In the state in which the drum cartridge  5  is mounted on the drawer  4  ( FIG.  4   ), the guide  313 A extends in a direction in which the guide  26 A of the drawer  4  extends. In the state in which the drum cartridge  5  is mounted on the drawer  4 , the guide  313 A is connected to the guide  26 A. When the toner cartridge  6  is mounted on the drawer  4  in the state in which the drum cartridge  5  is mounted on the drawer  4 , the guided portion  46 A ( FIG.  11   ) of the toner cartridge  6  engages the guide  313 A. The guided portion  46 A will be later explained. In mounting the toner cartridge  6  on the drawer  4  in the state in which the drum cartridge  5  is mounted on the drawer  4 , the guide  313 A guides the toner cartridge  6 . 
     In the state in which the drum cartridge  5  is mounted on the drawer  4  and the drawer  4  is located at the outside position ( FIG.  4   ), at least a part of the guide  313 A is located inside the housing  2 . 
     3.1.1.2 Aperture  314 A 
     As shown in  FIG.  7   , the aperture  314 A is a through-hole. One end of the photoconductive drum  10  is supported by the aperture  314 A. 
     Specifically, the photoconductive drum  10  includes a drum body  101  and flanges  102 A,  102 B. The drum body  101  extends in the second direction and has a cylindrical shape. The drum body  101  includes a first end portion in the second direction and a second end portion that is apart from the first end portion in the second direction. The flange  102 A is located at the first end portion of the drum body  101 . The flange  102 A is attached to the first end portion of the drum body  101  so as to extend in the second direction. The flange  102 A has a cylindrical shape. The flange  102 B is located at the second end portion of the drum body  101 . The flange  102 B is attached to the second end portion of the drum body  101  so as to extend in the second direction. The flange  102 B has a cylindrical shape. The flange  102 A is supported by the aperture  314 A. 
     3.1.1.3 Apertures  315 A,  316 A 
     As shown in  FIG.  9 A , the aperture  315 A is an elongate aperture and extends in a direction directed from the axis A 2  toward the axis A 1 . The shaft  12 C of the developer roller  12 B engages the aperture  315 A. The aperture  315 A guides the developer roller  12 B in the direction directed from the axis A 2  toward the axis A 1 . 
     The aperture  316 A is an elongate aperture and extends in the first direction. A boss  12 D of the developer device  12  is supported by the aperture  315 A, so that the developer device  12  is supported by the side plate  311 A. 
     3.1.2 Side Plate  311 B 
     As shown in  FIG.  7   , the side plate  311 B is located at the second end portion of the drawer  4  in the second direction. The side plate  311 B is apart from the side plate  311 A in the second direction. As shown in  FIGS.  7  and  9 A , the side plate  311 B has a guide  313 B ( FIG.  10 B ), an aperture  314 B ( FIG.  7   ), an aperture  315 B ( FIG.  9 B ), and an aperture  316 B ( FIG.  9 B ). The above explanation of the side plate  311 A is true of the side plate  311 B. Thus, explanation of the side plate  311 B is dispensed with. 
     3.1.3 Connection Portion  312   
     As shown in  FIG.  8 A , the connection portion  312  is located on the developer device  12  in the state in which the drum cartridge  5  is mounted on the drawer  4 . In the state in which the drum cartridge  5  and the toner cartridge  6  are mounted on the drawer  4 , the connection portion  312  is connected to a toner supply portion  412  ( FIG.  12 A ) and a waste-toner inlet portion  414  ( FIG.  13 A ) of the toner cartridge  6 . The connection portion  312  is located between the photoconductive drum  10  and the locking protrusion  33 A in the first direction in the state in which the drum cartridge  5  is mounted on the drawer  4 . The connection portion  312  is located between the photoconductive drum  10  and the guide  313 A in the first direction in the state in which the drum cartridge  5  is mounted on the drawer  4 . 
     As shown in  FIG.  7   , the connection portion  312  is located between the side plate  311 A and the side plate  311 B in the second direction. The connection portion  312  extends in the second direction. The connection portion  312  includes a first end portion and a second end portion in the second direction. The second end portion is apart from the first end portion in the second direction. The first end portion of the connection portion  312  in the second direction is connected to the side plate  311 A, and the second end portion of the connection portion  312  in the second direction is connected to the side plate  311 B. The connection portion  312  has a semi-cylindrical shape. The connection portion  312  has a waste-toner discharge opening  312 A and an inlet opening  312 B. In other words, the drum cartridge  5  has the waste-toner discharge opening  312 A and the inlet opening  312 B. 
     The waste-toner discharge opening  312 A is located at the first end portion of the connection portion  312  in the second direction. The toner conveyed by the waste-toner conveyor pipe  37  can be discharged through the waste-toner discharge opening  312 A. The waste-toner discharge opening  312 A communicates with an inner space of the waste-toner conveyor pipe  37 . 
     The inlet opening  312 B is located at the second end portion of the connection portion  312  in the second direction. In the state in which the drum cartridge  5  and the toner cartridge  6  are mounted on the drawer  4  ( FIG.  1   ), the toner discharged from a discharge opening  415  of the toner cartridge  6  can be received by the inlet opening  312 B. The discharge opening  415  will be later explained. 
     As shown in  FIG.  8 A , the inlet opening  312 B communicates with an inner space of the developer housing  12 A. Specifically, the developer housing  12 A has a through-hole  121  that communicates with the inner space of the developer housing  12 A. The inlet opening  312 B communicates with the through-hole  121 . The inlet opening  312 B communicates with the inner space of the developer housing  12 A via the through-hole  121 . 
     3.2 Guided Portion  32 A 
     As shown in  FIG.  7   , the guided portion  32 A is located opposite to the side plate  311 B with respect to the side plate  311 A in the second direction. The guided portion  32 A is located on the first surface S 11  of the side plate  311 A. The guided portion  32 A is a protrusion that extends from the first surface S 11  of the side plate  311 A. The guided portion  32 A may be attached to the first surface S 11  of the side plate  311 A. The guided portion  32 A extends in the second direction. The guided portion  32 A extends along the axis A 1  and has a cylindrical shape. 
     In the present embodiment, one end of the photoconductive drum  10  in the second direction is fitted to the guided portion  32 A. The flange  102 A of the photoconductive drum  10  is fitted to the guided portion  32 A. The guided portion  32 A may be the one end of the photoconductive drum  10  in the second direction. The guided portion  32 A may be the flange  102 A of the photoconductive drum  10 . The one end of the photoconductive drum  10  in the second direction need not be necessarily fitted to the guided portion  32 A. 
     In mounting the drum cartridge  5  on the drawer  4  ( FIGS.  3  and  4   ), the guided portion  32 A is guided by the guide  27 A ( FIG.  3   ) of the drawer  4 . In the state in which the drum cartridge  5  is mounted on the drawer  4 , the guided portion  32 A engages the receiving portion  29 A ( FIG.  3   ) of the drawer  4 . 
     3.3 Guided Portion  32 B 
     The guided portion  32 B is located opposite to the side plate  311 A with respect to the side plate  311 B in the second direction. The guided portion  32 B is apart from the guided portion  32 A in the second direction. The above explanation of the guided portion  32 A is true of the guided portion  32 B. Thus, explanation of the guided portion  32 B is dispensed with. 
     3.4 Locking Protrusion  33 A 
     The locking protrusion  33 A is located opposite to the side plate  311 B with respect to the side plate  311 A in the second direction. The locking protrusion  33 A is located on the first surface S 1  of the side plate  311 A. The locking protrusion  33 A extends from the first surface S 1  of the side plate  311 A. The locking protrusion  33 A may be attached to the first surface S 11  of the side plate  311 A. The locking protrusion  33 A extends in the second direction and has a cylindrical columnar shape. 
     As show in  FIG.  8 A , the locking protrusion  33 A is apart from the guided portion  32 A in the first direction. The locking protrusion  33 A is located opposite to the guided portion  32 A with respect to the shutter  35  in the first direction. The locking protrusion  33 A is located opposite to the guided portion  32 A with respect to the inlet opening  312 B in the first direction. In the state in which the drum cartridge  5  is mounted on the drawer  4 , the locking protrusion  33 A engages the locking portion  30 A ( FIG.  6   ) of the drawer  4 . When the locking protrusion  33 A engages the locking portion  30 A, the drum cartridge  5  is locked at the locking portion  30 A. In other words, the drum cartridge  5  is locked at the locking portion  30 A in the state in which the drum cartridge  5  is mounted on the drawer  4 . The drum cartridge  5  that is thus locked at the locking portion  30 A is prevented from coming off from the drawer  4 . Specifically, the drum cartridge  5  is prevented from coming off from the drawer  4  when the toner cartridge  6  is detached from the drawer  4 . This configuration enables the toner cartridge  6  to be smoothly replaced in the state in which the drum cartridge  6  is mounted on the drawer  4 . 
     3.5 Locking Protrusion  33 B 
     As shown in  FIG.  7   , the locking protrusion  33 B is located opposite to the side plate  311 A with respect to the side plate  311 B in the second direction. The locking protrusion  33 B is apart from the locking protrusion  33 A in the second direction. The above explanation of the locking protrusion  33 A is true of the locking protrusion  33 B. Thus, explanation of the locking protrusion  33 B is dispensed with. 
     3.6 Seal  34   
     As shown in  FIG.  8 A , the seal  34  is provided between the connection portion  312  and the developer housing  12 A. The seal  34  seals between the connection portion  312  and the developer housing  12 A so as to surround the inlet opening  312 B and the through-hole  121 . This arrangement prevents leakage of the toner received by the inlet opening  312 B from between the connection portion  312  and the developer housing  12 A. The seal  34  has elasticity. Specifically, the seal  34  is a sponge. 
     3.7 Shutter  35   
     As shown in  FIGS.  8 A and  8 B , the shutter  35  is movable between a closing position ( FIG.  8 A ) and an open position ( FIG.  8 B ). The shutter  35  is pivotable about an axis A 3  between the closing position and the open position. As shown in  FIGS.  8 A and  10 A , when the shutter  35  is located at the closing position, the shutter  35  closes the inlet opening  312 B and the waste-toner discharge opening  312 A. As shown in  FIGS.  8 B and  10 B , when the shutter  35  is located at the open position, the shutter  35  opens the inlet opening  312 B and the waste-toner discharge opening  312 A. The shutter  35  extends in the second direction. The shutter  35  includes a first end portion in the second direction and a second end portion that is apart from the first end portion in the second direction. As shown in  FIGS.  8 A and  10 A , the shutter  35  includes an end plate  351 A ( FIG.  8 A ), an end plate  351 B ( FIG.  10 A ), and a shutter body  352 . 
     3.7.1 End Plate  351 A 
     As shown in  FIG.  8 A , the end plate  351 A is located at the first end portion of the shutter  35  in the second direction. The end plate  351 A is located on the second surface S 12  of the side plate  311 A of the frame  31 . The end plate  351 A is a circular plate. The end plate  351 A is rotatable about the axis A 3 . The end plate  351 A has a groove  353 A. In other words, the shutter  35  has a groove  353 A. 
     The groove  353 A extends in the radial direction of the end plate  351 A. In the state in which the shutter  35  is located at the closing position, the groove  353 A is connected to the guide  313 A. In the state in which the shutter  35  is located at the open position, the groove  353 A is not connected to the guide  313 A as shown in  FIG.  8 B . In the state in which the drum cartridge  5  and the toner cartridge  6  are mounted on the drawer  4 , the guided portion  46 A ( FIG.  11   ) of the toner cartridge  6  engages the groove  353 A. 
     3.7.2 End Plate  351 B 
     As shown in  FIG.  10 A , the end plate  351 B is apart from the end plate  351 A in the second direction. The end plate  351 B is located at the second end portion of the shutter  35  in the second direction. The above explanation of the end plate  351 A is true of the end plate  351 B. Thus, explanation of the end plate  351 B is dispensed with. 
     3.7.2 Shutter Body  352   
     As shown in  FIGS.  8 A and  10 A , the shutter body  352  closes the waste-toner discharge opening  312 A and the inlet opening  312 B in the state in which the shutter  35  is located at the closing position. The shutter body  352  is located between the end plate  351 A and the end plate  351 B in the second direction. The shutter body  352  extends in the second direction. The shutter body  352  includes a first end portion in the second direction and a second end portion that is apart from the first end portion in the second direction. The first end portion of the shutter body  352  in the second direction is connected to the end plate  351 A, and the second end portion of the shutter body  352  in the second direction is connected to the end plate  351 B. The shutter body  352  is pivotable about the axis A 3  together with the end plate  351 A and the end plate  351 B. 
     3.8 Drum Cleaner  36   
     As shown in  FIG.  7   , the drum cleaner  36  is located between the side plate  311 A and the side plate  311 B in the second direction. The drum cleaner  36  extends in the second direction. The drum cleaner  36  includes a first end portion in the second direction and a second end portion that is apart from the first end portion in the second direction. The first end portion of the drum cleaner  36  is connected to the side plate  311 A, and the second end portion of the drum cleaner  36  is connected to the side plate  311 B. The drum cleaner  36  collects waste toner that remains on the surface of the photoconductive drum  10  without being transferred to the sheet S. 
     As shown in  FIG.  8 A , the drum cleaner  36  includes a cleaner housing  361 , a cleaning blade  362 , and an auger screw  363 . 
     3.8.1 Cleaner Housing  361   
     As shown in  FIG.  7   , the cleaner housing  361  is located between the side plate  311 A and the side plate  311 B in the second direction. The cleaner housing  361  extends in the second direction. The cleaner housing  361  includes a first end portion and a second end portion in the second direction. The first end portion of the cleaner housing  361  is connected to the side plate  311 A, and the second end portion of the cleaner housing  361  is connected to the side plate  311 B. 
     As shown in  FIG.  8 A , the cleaner housing  361  has an opening  364 . 
     3.8.2 Cleaning Blade  362   
     The cleaning blade  362  is attached to the cleaner housing  361 . The cleaning blade  362  is in contact with the surface of the photoconductive drum  10  at an edge thereof. When the photoconductive drum  10  rotates, the waste toner on the surface of the photoconductive drum  10  comes into contact with the edge of the cleaning blade  362 , so as to be removed from the surface of the photoconductive drum  10 . The thus removed waste toner is stored in the cleaner housing  361  through the opening  364 . 
     3.8.3 Auger Screw  363   
     The auger screw  363  is disposed in the cleaner housing  361 . 
     As shown in  FIG.  7   , the auger screw  363  extends in the second direction. The auger screw  363  conveys the waste toner in the cleaner housing  361  toward the waste-toner conveyor pipe  37 . 
     3.9 Waste-Toner Conveyor Pipe  37   
     As shown in  FIG.  7   , the waste-toner conveyor pipe  37  conveys the waste toner from the drum cleaner  36  to the waste-toner discharge opening  312 A. Specifically, the waste-toner conveyor pipe  37  conveys the waste toner in the cleaner housing  361  to the waste-toner discharge opening  312 A. 
     As shown in  FIG.  10 A , the waste-toner conveyor pipe  37  includes a pipe  371  and a screw  372 . 
     The pipe  371  includes a first end portion and a second end portion that is apart from the first end portion. The first end portion of the pipe  371  is connected to the cleaner housing  361  ( FIG.  7   ) of the drum cleaner  36 , and the second end portion of the pipe  371  is connected to the connection portion  312 . An inner space of the pipe  371  communicates with an inner space of the cleaner housing  361  and the waste-toner discharge opening  312 A. Thus, the waste toner in the cleaner housing  361  is discharged from the waste-toner discharge opening  312 A through the pipe  371  as shown in  FIG.  10 B  in the state in which the shutter  35  is located at the open position. 
     The screw  372  is disposed in the pipe  371 . The screw  372  conveys the waste toner in the pipe  371  toward the waste-toner discharge opening  312 A. The screw  372  extends in a direction in which the pipe  371  extends. The screw  372  is connected to the auger screw  363  ( FIG.  7   ). The screw  372  is rotatable together with the auger screw  363 . Specifically, the screw  372  is a shaftless screw. 
     4. Details of Toner Cartridge  6   
     Referring next to  FIGS.  11 - 14   , the toner cartridge  6  will be explained. 
     As shown in  FIG.  11   , the toner cartridge  6  extends in the second direction. The toner cartridge  6  includes a first end portion  6 A and a second end portion  6 B in the second direction. The second end portion  6 B is apart from the first end portion  6 A in the second direction. The toner cartridge  6  extends in the first direction. The toner cartridge  6  includes a first end portion  6 C and a second end portion  6 D in the first direction. The second end portion  6 D is apart from the first end portion  6 C in the first direction. As shown in  FIGS.  11  and  12 A , the toner cartridge  6  includes a toner cartridge housing  41 , a belt conveyor  42 , an agitator  43 , an auger screw  44 , a shutter  45  (as one example of “first shutter”), the guided portion  46 A, a guided portion  46 B, and a handle  47 . 
     4.1 Toner Cartridge Housing  41   
     The toner cartridge housing  41  includes a toner storage portion  411 , the toner supply portion  412 , a waste-toner storage portion  413 , and a waste-toner inlet portion  414  ( FIG.  11   ). 
     4.1.1 Toner Storage Portion  411   
     The toner storage portion  411  stores the toner. 
     4.1.2 Toner Supply Portion  412   
     The toner supply portion  412  is located at the first end portion  6 C of the toner cartridge  6  in the first direction. In the state in which the drum cartridge  5  and the toner cartridge  6  are mounted on the drawer  4 , the toner supply portion  412  is capable of supplying the toner to the developer device  12  ( FIG.  1   ) of the drum cartridge  5 . As shown in  FIG.  12 A , the toner supply portion  412  is connected to the toner storage portion  411 . An inner space of the toner supply portion  412  communicates with an inner space of the toner storage portion  411 . The inner space of the toner supply portion  412  does not communicate with an inner space of the waste-toner storage portion  413  and an inner space of the waste-toner inlet portion  414  ( FIG.  11   ). 
     As shown in  FIG.  11   , the toner supply portion  412  extends in the second direction and has a cylindrical shape. The toner supply portion  412  has a discharge opening  415 . In other words, the toner cartridge  6  has the discharge opening  415 . 
     The discharge opening  415  is located at the second end portion  6 B of the toner cartridge  6  in the second direction. As shown in  FIG.  12 A , the discharge opening  415  communicates with the inner space of the toner supply portion  412 . The toner in the toner supply portion  412  can be discharged through the discharge opening  415 . The discharge opening  415  is located inside the housing  2  in the state in which the toner cartridge  6  and the drum cartridge  5  are mounted on the drawer  4  and the drawer  4  is located at the outside position ( FIG.  2   ). 
     4.1.3 Waste-Toner Storage Portion  413   
     As shown in  FIG.  11   , the waste-toner storage portion  413  stores the waste toner. In the state in which the toner cartridge  6  and the drum cartridge  5  are mounted on the drawer  4  as shown in  FIG.  1   , the waste-toner storage portion  413  is located below the toner storage portion  411 . The inner space of the waste-toner storage portion  413  does not communicate with the inner space of the toner storage portion  411  and the inner space of the toner supply portion  412 . 
     4.1.4 Waste-Toner Inlet Portion  414   
     As shown in  FIGS.  11  and  13 A , the waste-toner inlet portion  414  is located at the first end portion  6 A of the toner cartridge  6  in the second direction. The waste-toner inlet portion  414  is a pipe. The waste-toner inlet portion  414  includes a first end portion and a second end portion in a direction of extension thereof. The first end portion of the waste-toner inlet portion  414  is located at the first end portion  6 C of the toner cartridge  6  in the first direction. The first end portion of the waste-toner inlet portion  414  is located between the guided portion  46 A and the toner supply portion  412  in the second direction. The second end portion of the waste-toner inlet portion  414  is connected to the waste-toner storage portion  413 . 
     As shown in  FIG.  13 A , the inner space of the waste-toner inlet portion  414  communicates with the inner space of the waste-toner storage portion  413 . The inner space of the waste-toner inlet portion  414  does not communicate with the inner space of the toner storage portion  411  and the inner space of the toner supply portion  412 . In the state in which the toner cartridge  6  and the drum cartridge  5  are mounted on the drawer  4 , the second end portion of the waste-toner inlet portion  414  is located at a height level lower than the first end portion of the waste-toner inlet portion  414 . The waste-toner inlet portion  414  has a waste-toner inlet opening  416 . The waste-toner inlet portion  414  further has a vane  417 . 
     As shown in  FIG.  11   , the waste-toner inlet opening  416  is located at the first end portion of the waste-toner inlet portion  414 . The waste-toner inlet opening  416  is located at the first end portion  6 C of the toner cartridge  6  in the first direction. The waste-toner inlet opening  416  is located between the guided portion  46 A and the toner supply portion  412  in the second direction. As shown in  FIG.  13 A , the waste-toner inlet opening  416  communicates with the inner space of the waste-toner inlet portion  414 . 
     The vane  417  is disposed in the first end portion of the waste-toner inlet portion  414 . The vane  417  is rotatable together with the auger screw  44  ( FIG.  11   ) of the toner supply portion  412 . 
     4.2 Belt Conveyor  42   
     As shown in  FIG.  12 A , the belt conveyor  42  is disposed in the toner storage portion  411 . The belt conveyor  42  conveys the toner in the toner storage portion  411  toward the agitator  43 . 
     4.3 Agitator  43   
     The agitator  43  is disposed in the toner storage portion  411 . The agitator  43  conveys the toner in the toner storage portion  411  to the toner supply portion  412 . The agitator  43  is rotatable about an axis A 4 . In the state in which the toner cartridge  6  and the drum cartridge  5  are mounted on the drawer  4 , the axis A 4  of the agitator  43  is located at a height level lower than the discharge opening  415 . 
     4.4 Auger Screw  44   
     The auger screw  44  is disposed in the toner supply portion  412 . As shown in  FIG.  11   , the auger screw  44  extends in the second direction. The auger screw  44  conveys the toner in the toner supply portion  412  toward the discharge opening  415 . 
     4.5 Shutter  45   
     As shown in  FIGS.  12 A and  12 B , the shutter  45  is movable between a closing position ( FIG.  12 A ) and an open position ( FIG.  12 B ). As shown in  FIG.  12 A , the shutter  45  closes the discharge opening  415  in the state in which the shutter  45  is located at the closing position. As shown in  FIG.  13 A , the shutter  45  further closes the waste-toner inlet opening  416  in the state in which the shutter  45  is located at the closing position. As shown in  FIG.  12 B , the shutter  45  opens the discharge opening  415  in the state in which the shutter  45  is located at the open position. As shown in  FIG.  13 B , the shutter  45  further opens the waste-toner inlet opening  416  in the state in which the shutter  45  is located at the open position. 
     As shown in  FIG.  11   , the shutter  45  extends in the second direction. The shutter  45  includes a first end portion in the second direction and a second end portion that is apart from the first end portion in the second direction. The shutter  45  includes end plates  451 A,  451 B and a shutter body  452 . 
     4.5.1 End Plates  451 A,  451 B 
     As shown in  FIGS.  11  and  14   , the end plate  451 A is located at the first end portion of the shutter  45  in the second direction. The end plate  451 A is located opposite to the toner supply portion  412  with respect to the first end portion of the waste-toner inlet portion  414  in the second direction. In other words, the first end portion of the waste-toner inlet portion  414  is located between the end plate  451 A and the toner supply portion  412  in the second direction. The end plate  451 A is a circular plate. The end plate  451 A is rotatable about an axis A 5 . 
     As shown in  FIG.  11   , the end plate  451 B is located at the second end portion of the shutter  45  in the second direction. The end plate  451 B is apart from the end plate  451 A in the second direction. The end plate  451 B is located opposite to the end plate  451 A with respect to the toner supply portion  412  in the second direction. In other words, the toner supply portion  412  is located between the end plate  451 A and the end plate  451 B. The above explanation of the end plate  451 A is true of the end plate  451 B. Thus, explanation of the end plate  451 B is dispensed with. 
     4.5.2 Shutter Body  452   
     As shown in  FIGS.  12 A and  13 A , the shutter body  452  closes the discharge opening  415  and the waste-toner inlet opening  416  in the state in which the shutter  45  is located at the closing position. As shown in  FIG.  11   , the shutter body  452  is located between the end plate  451 A and the end plate  451 B in the second direction. The shutter body  452  extends in the second direction. The shutter body  452  includes a first end portion in the second direction and a second end portion that is apart from the first end portion in the second direction. The first end portion of the shutter body  452  in the second direction is connected to the end plate  451 A, and the second end portion of the shutter body  452  in the second direction is connected to the end plate  451 B. The shutter body  452  is pivotable about the axis A 5  together with the end plate  451 A and the end plate  451 B. 
     4.6 Guided Portions  46 A,  46 B 
     As shown in  FIG.  11   , the guided portion  46 A is located at the first end portion  6 A of the toner cartridge  6  in the second direction. The guided portion  46 A extends from the end plate  451 A of the shutter  45 . The guided portion  46 A may be attached to the end plate  451 A of the shutter  45 . 
     The guided portion  46 A is a protrusion. That is, the shutter  45  includes a protrusion. Specifically, the guided portion  46 A is a rib as shown in  FIG.  14   . The guided portion  46 A extends in the radial direction of the end plate  451 A. 
     The guided portion  46 A is guided by the guide  26 A ( FIG.  4   ) of the drawer  4  and the guide  313 A ( FIG.  4   ) of the drum cartridge  5  in mounting the toner cartridge  6  on the drawer  4 . In other words, the guide  26 A and the guide  313 A guide the guided portion  46 A of the shutter  45  in mounting the toner cartridge  6  on the drawer  4 . Thus, the guide  313 A guides the shutter  45  of the toner cartridge  6  via the guided portion  46 A in mounting the toner cartridge  6  on the drawer  4 . 
     In the state in which the drum cartridge  5  and the toner cartridge  6  are mounted on the drawer  4  ( FIG.  2   ), the guided portion  46 A engages the groove  353 A ( FIG.  8 A ) of the drum cartridge  5 , whereby the shutter  35  ( FIG.  8 A ) becomes movable together with the shutter  45 . In the state in which the shutter  45  is located at the closing position ( FIG.  12 A ), the shutter  35  is located at the closing position ( FIG.  8 A ). In the state in which the shutter  45  is located at the open position ( FIG.  12 B ), the shutter  35  is located at the open position ( FIG.  8 B ). 
     As shown in  FIG.  11   , the guided portion  46 B is apart from the guided portion  46 A in the second direction. The guided portion  46 B is located at the second end portion  6 B of the toner cartridge  6  in the second direction. The guided portion  46 B extends from the end plate  451 B of the shutter  45 . The guided portion  46 B may be attached to the end plate  451 B of the shutter  45 . The above explanation of the guided portion  46 A is true of the guided portion  46 B. Thus, explanation of the guided portion  46 B is dispensed with. 
     4.7 Handle  47   
     As shown in  FIG.  12 A , the handle  47  is gripped by the user when the user replaces the toner cartridge  6 . As shown in  FIGS.  12 A and  12 B , the handle  47  is pivotable about the axis A 5  between a first position ( FIG.  12 A ) and a second position ( FIG.  12 B ). The handle  47  moves in conjunction with the shutter  45 . As shown in  FIG.  12 A , the shutter  45  is located at the closing position when the handle  47  is located at the first position. As shown in  FIG.  12 B , the shutter  45  is located at the open position when the handle  47  is located at the second position. 
     As shown in  FIG.  11   , the handle  47  includes arms  471 A,  471 B and a grip  472 . 
     The arm  471 A extends from the first end portion of the shutter  45  in the second direction. The arm  471 A may be attached to the first end portion of the shutter  45  in the second direction. 
     The arm  471 B is apart from the arm  471 A in the second direction. The arm  471 B extends from the second end portion of the shutter  45  in the second direction. The arm  471 B may be attached to the second end portion of the shutter  45  in the second direction. 
     The grip  472  is located between the arm  471 A and the arm  471 B in the second direction. The grip  472  extends in the second direction. The grip  472  includes a first end portion in the second direction and a second end portion that is apart from the first end portion in the second direction. The first end portion of the grip  472  in the second direction is connected to the arm  471 A, and the second end portion of the grip  472  in the second direction is connected to the arm  471 B. In the state in which the drum cartridge  5  and the toner cartridge  6  are mounted on the drawer  4  and the drawer  4  is located at the outside position ( FIG.  2   ), the grip  472  is located outside the housing  2 . In the state in which the drum cartridge  5  and the toner cartridge  6  are mounted on the drawer  4  and the drawer  4  is located at the outside position, the guided portion  23 A is located between the discharge opening  415  and the grip  472  in the first direction. 
     5. Mounting of Drum Cartridge 
     There will be next explained mounting of the drum cartridge  5  on the drawer  4 . 
     In mounting the drum cartridge  5  on the drawer  4 , the user moves the cover  2 B to the open position and pulls the drawer  4  out of the housing  2 . 
     As shown in  FIG.  3   , the user then places the drum cartridge  5  on the drawer  4  in the state in which the drawer  4  is located at the outside position. 
     When the user places the drum cartridge  5  on the drawer  4  located at the outside position, the side plate  311 A ( FIG.  7   ) of the drum cartridge  5  comes into contact with the guide  26 A of the drawer  4  and the guided portion  32 A ( FIG.  7   ) of the drum cartridge  5  comes into contact with the guide  27 A of the drawer  4 . 
     The user then slides the drum cartridge  5  toward the housing  2 . 
     In this instance, the side plate  311 A of the drum cartridge  5  is guided by the guide  26 A, and the guided portion  32 A of the drum cartridge  5  is guided by the guide  27 A. Thus, the drum cartridge  5  is slid toward the inside of the housing  2 . 
     When the side plate  311 A of the drum cartridge  5  engages the receiving portion  28 A, the guided portion  32 A of the drum cartridge  5  engages the receiving portion  29 A, and the locking protrusion  33 A ( FIG.  7   ) of the drum cartridge  5  engages the locking portion  30 A, mounting of the drum cartridge  5  on the drawer  4  is completed as shown in  FIG.  4   . In the state in which the drum cartridge  5  is mounted on the drawer  4 , the guide  313 A of the drum cartridge  5  is connected to the guide  26 A of the drawer  4 . 
     In detaching the drum cartridge  5  from the drawer  4 , the user withdraws the drum cartridge  5  from the drawer  4  in the first direction in the state in which the drawer  4  is located at the outside position. 
     In this instance, the locking protrusion  33 A is disengaged from the locking portion  30 A, so that the drum cartridge  5  is detached from the drawer  4 . 
     6. Mounting of Toner Cartridge 
     There will be next explained mounting of the toner cartridge  6  on the drawer  4 . 
     In mounting the toner cartridge  6  on the drawer  4 , the user places the toner cartridge  6  on the drawer  4  in the state in which the drawer  4  is located at the outside position and the drum cartridge  5  is mounted on the drawer  4  as shown in  FIG.  4   . 
     When the user places the toner cartridge  6  on the drawer  4  located at the outside position, the guided portion  46 A ( FIG.  1   ) of the toner cartridge  6  comes into contact with the guide  26 A of the drawer  4 . In the state in which the toner cartridge  6  is placed on the drawer  4 , the handle  47  of the toner cartridge  6  is located at the first position ( FIG.  12 A ). 
     The user then slides the toner cartridge  6  toward the housing  2 . 
     In this instance, the guided portion  46 A of the toner cartridge  6  is guided by the guide  26 A of the drawer  4  and is subsequently guided by the guide  313 A of the drum cartridge  5 . Thus, the toner cartridge  6  is slid toward the inside of the housing  2 . 
     When the guided portion  46 A of the toner cartridge  6  engages the groove  353 A of the shutter  35 , the shutter  35  becomes movable together with the shutter  45 . 
     The user then moves the handle  47  of the toner cartridge  6  from the first position ( FIG.  12 A ) to the second position ( FIG.  12 B ). 
     When the handle  47  of the toner cartridge  6  is moved from the first position to the second position, the shutter  45  moves from the closing position to the open position and the shutter  35  moves from the closing position to the open position. 
     When the handle  47  is located at the second position, the shutter  45  is located at the open position and the shutter  35  is located at the open position as shown in  FIG.  2   . In this way, mounting of the toner cartridge  6  on the drawer  4  is completed. 
     In detaching the toner cartridge  6  from the drawer  4 , the user moves the handle  47  of the toner cartridge  6  from the second position to the first position in the state in which the drawer  4  is located at the outside position. 
     When the handle  47  of the toner cartridge  6  is moved from the second position to the first position, the shutter  45  moves from the open position to the closing position and the shutter  35  moves from the open position to the closing position. 
     The user then withdraws the toner cartridge  6  from the drawer  4  in the first direction. 
     In this instance, the guided portion  46 A is disengaged from the groove  353 A of the shutter  35 , so that the toner cartridge  6  is detached from the drawer  4 . 
     7. Advantageous Effects 
     (1) The image forming device  1  includes the drawer  4 , the drum cartridge  5 , and the toner cartridge  6  as shown in  FIG.  1   . The drum cartridge  5  includes the photoconductive drum  10  and the developer roller  12 B. The drum cartridge  5  is mountable on the drawer  4  as shown in  FIGS.  3  and  4   . The toner cartridge  6  stores the toner and is mountable on the drawer  4  as shown in  FIGS.  4  and  2   . 
     In the thus configured image forming device including the drawer  4 , (a) the drum cartridge  5  including the photoconductive drum  10  and the developer roller  12 B and (b) the toner cartridge  6  storing the toner can be replaced independently of each other. 
     Thus, each of the drum cartridge  5  and the toner cartridge  6  can be replaced at appropriate timing in accordance with its life. 
     In the image forming device  1  constructed as described above, the guide  313 A of the drum cartridge  5  is connected to the guide  26 A of the drawer  4  in the state in which the drum cartridge  5  is mounted on the drawer  4  as shown in  FIG.  4   . 
     As shown in  FIGS.  4  and  2   , this configuration enables the toner cartridge  6  to be guided by the guide  313 A of the drum cartridge  5  and the guide  26 A of the drawer  4  in mounting the toner cartridge  6  on the drawer  4 . 
     Thus, the toner cartridge  6  can be guided to the drum cartridge  5  utilizing the drawer  4  while achieving size reduction of the drum cartridge  5 . 
     (2) In the image forming device  1 , the guide  26 A guides the drum cartridge  5  in mounting the drum cartridge  5  on the drawer  4  as shown in  FIGS.  3  and  4   . 
     Thus, the drum cartridge  5  can be guided utilizing the guide  26 A that guides the toner cartridge  6 . 
     As a result, the drum cartridge  5  can be smoothly mounted on the drawer  4  while preventing the structure of the drawer  4  from becoming complicated. 
     (3) In the image forming device  1 , the drawer  4  includes the guide  27 A as shown in  FIG.  6   . As shown in  FIGS.  3  and  4   , the guide  27 A guides the photoconductive drum  10  in mounting the drum cartridge  5  on the drawer  4 . 
     Thus, the guide  27 A of the drawer  4  can guide the photoconductive drum  10  to a specific position with respect to the drawer  4 . 
     (4) In the image forming device  1 , at least a part of the guide  313 A is located inside the housing  2  as shown in  FIG.  4    in the state in which the drum cartridge  5  is mounted on the drawer  4  and the drawer  4  is located at the outside position. 
     According to this configuration, the toner cartridge  6  can be mounted on the drawer  4  in a state in which the drawer  4  is pulled out of the housing  2  to such an extent that at least a part of the guide  313 A is located inside the housing  2 . 
     As a result, this configuration shortens a distance over which the drawer  4  is pulled out, thus reducing a space necessary for replacing the toner cartridge  6 . 
     (5) In the image forming device  1 , the photoconductive drum  10  is located inside the housing  2  as shown in  FIG.  4    in the state in which the drum cartridge  5  is mounted on the drawer  4  and the drawer  4  is located at the outside position. 
     This configuration prevents light outside the housing  2  from being incident on the photoconductive drum  10  in the state in which the drawer  4  is located at the outside position. 
     As a result, the photoconductive drum  10  is protected from being deteriorated due to the light. 
     Further, the toner cartridge  6  can be mounted on the drawer  4  in a state in which the drawer  4  is pulled out of the housing  2  to such an extent that the photoconductive drum  10  is located inside the housing  2 . 
     As a result, this configuration shortens the distance over which the drawer  4  is pulled out, thus reducing the space necessary for replacing the toner cartridge  6 . 
     (6) In the image forming device  1 , the developer housing  12 A is located inside the housing  2  as shown in  FIG.  4    in the state in which the drum cartridge  5  is mounted on the drawer  4  and the drawer  4  is located at the outside position. 
     According to this configuration, the toner cartridge  6  can be mounted on the drawer  4  in a state in which the drawer  4  is pulled out of the housing  2  to such an extent that the developer housing  12 A is located inside the housing  2 . 
     As a result, this configuration shortens the distance over which the drawer  4  is pulled out, thus reducing the space necessary for replacing the toner cartridge  6 . 
     (7) In the image forming device  1 , the guided portion  23 A of the drawer  4  is located between the discharge opening  415  and the grip  472  in the first direction as shown in  FIG.  2    in the state in which the toner cartridge  6  and the drum cartridge  5  are mounted on the drawer  4  and the drawer  4  is located at the outside position. 
     According to this configuration, the guided portion  23 A can receive a torque caused by the pivotal movement of the handle  47  between the first position ( FIG.  12 A ) and the second position ( FIG.  12 B ). 
     As a result, this configuration prevents the image forming device  1  from toppling due to the torque, thus enabling the handle  47  to smoothly pivot. 
     8. Modification 
     Referring next to  FIGS.  15  and  16   , there will be explained a modification. The same reference numerals as used in the illustrated embodiment will be used to identify the corresponding components in the modification and explanation thereof is dispensed with. 
     As shown in  FIG.  15   , the drawer  4  may include a locking lever  50  in place of the protrusion  301  ( FIG.  6   ) of the locking portion  30 A. 
     The locking lever  50  is attached to the side plate  21 A of the drawer  4 . The locking lever  50  is movable between a lock position (as indicated by solid line in  FIG.  15   ) and an unlock position (as indicated by virtual line in  FIG.  15   ). 
     The locking lever  50  includes a protrusion  501  indicated by solid line in  FIG.  15   . When the locking lever  50  is located at the lock position, the protrusion  501  is located in the locking portion  30 A. When the user tries to detach the drum cartridge  5  from the drawer  4  in the state in which the locking lever  50  is located at the lock position, the locking protrusion  33 A of the drum cartridge  5  comes into contact with the protrusion  501  of the locking lever  50 . Thus, the drum cartridge  5  cannot be detached from the drawer  4  in the state in which the locking lever  50  is located at the lock position. That is, the locking lever  50  locks the drum cartridge  5  with respect to the drawer  4  in the state in which the locking lever  50  is located at the lock position. 
     On the other hand, the protrusion  501  is not located in the locking portion  30 A as indicated by virtual line in  FIG.  15    in the state in which the locking lever  50  is located at the unlock position. Thus, when the locking lever  50  is located at the unlock position, the drum cartridge  5  is unlocked from the drawer  4 . As a result, the drum cartridge  5  can be detached from the drawer  4  in the state in which the locking lever  50  is located at the unlock position. 
     As shown in  FIG.  16   , the grip  472  of the handle  47  is located between the locking lever  50  and the first end portion E 11  of the side plate  21 A in the first direction in the state in which the toner cartridge  6  and the drum cartridge  5  are mounted on the drawer  4  and the drawer  4  is located at the outside position. In other words, the grip  472  of the handle  47  is located more outward than the locking lever  50 . 
     This configuration easily attracts the user&#39;s attention to the grip  472  rather than to the locking lever  50  in the state in which the toner cartridge  6  and the drum cartridge  5  are mounted on the drawer  4  and the drawer  4  is located at the outside position. 
     As a result, the user can operate the handle  47  prior to operating the locking lever  50  and can detach the toner cartridge  6  from the drawer  4  in the state in which the drum cartridge  5  is locked with respect to the drawer  4 .