A developing cartridge is configured to be detachably mounted on an imaging device including a detecting device. The developing cartridge includes a housing; a rotating member rotatably provided in the housing; a driving force receiving member configured to receive a driving force from the imaging device to drive the rotating member to rotate; and a detected device configured to be in electrical contact with the detecting device when the developing cartridge is mounted in the imaging device. When the rotating member is driven by the driving force receiving member to rotate, the detected device is switched between an electrical disconnection state and an electrical connection state. An imaging device having the developing cartridge is also provided.

An image forming apparatus includes: a first hardware processor that, when receiving an execution command of a job related to formation of an image on a continuous recording medium, calculates a consumption amount of a recording agent on a basis of information of the job; and a second hardware processor that determines whether the recording agent is sufficient on a basis of the consumption amount, wherein in a case where the second hardware processor determines that the recording agent is insufficient, a notification that the recording agent is insufficient is made.

An image forming apparatus comprises an intermediate transfer unit including an intermediate transfer belt and a residual toner collecting container, a belt monitoring unit configured to detect a condition of the lifespan of the intermediate transfer belt, a full state detection unit configured to detect a full state of the residual toner collecting container; and a control unit configured to control an operation of the image forming apparatus based on detection of a full state of the residual toner collecting container by the full state detection unit before the belt monitoring unit detects reaching of an end of the lifespan of the intermediate transfer belt.

An image forming apparatus includes an image forming unit having an image carrier, a charging device, and a development device, so as to perform image formation using toner, an exposure device, an image density sensor, a development voltage power supply, a control unit, and a layer thickness detection mechanism. The control unit can perform calibration, in which density of a reference image formed by the image forming unit is detected by the image density sensor, and the development voltage is adjusted based on a detection result, so as to adjust the density of the toner image. The layer thickness detection mechanism detects thickness of the photosensitive layer. Along with a decrease in the thickness of the photosensitive layer detected by the layer thickness detection mechanism, the control unit stepwisely decreases an upper limit value of the DC voltage from a reference value, when adjusting the development voltage in the calibration.

A resin molded component includes a discoloration checker made of a first material discolored at a first speed; and a resin molded portion including the discoloration checker, the resin molded portion made of a second material discolored at a second speed faster than the first speed at which the first material of the discoloration checker discolors.