| 摘要 |
The present invention provides a processing unit (20) including a unit main body (12) and a toner box (40) detachably mountable to the unit main body (12). The toner box (40) includes a toner casing (42) formed with a toner ejecting port (49) for feeding the developing agent to the unit main body (12), and a toner-side blocking member (41) for opening and closing the toner ejecting port (49). The unit main body (12) includes a process casing (62) formed with a toner guiding port (88) to receive the developing agent fed from the toner ejecting port (49), a process-side blocking member (111) for opening and closing the toner guiding port (88), and an open/close member (113) for opening and closing the toner ejecting port (49) and the toner guiding port (88) by the toner-side blocking member (41) and the process-side blocking member (111) when the toner box (40) is mounted to the unit main body (12). |
