Cap configuration for a toner cartridge

摘要

Aspects described herein relate to a cap for a toner cartridge. In one example, the cap may be configured to close a toner supply opening (83) of the toner cartridge. According to one or more aspects, the cap may include a sealing or covering portion (85) configured to cover the toner supply opening (83) and a shaft portion (83) for rotatably supporting a to-be-detected rotary member (56). The to-be-detected rotary member (56) is rotatably supported around and fitted onto the shaft portion (83). Therefore, even if a toner supply opening of a cartridge is provided in a sidewall of the housing (13) on a side where the to-be-detected rotary member is provided, e.g., a left sidewall, the toner supply opening and the to-be-detected rotary member can be provided in such a manner as to overlap each other.