In accordance with a first aspect of the present disclosure, a cleaning device includes a conveying member and a plurality of scraping pieces. The conveying member has a rotating shaft and a spiral blade formed around the rotating shaft. The conveying member is configured to be rotated around an axis to convey a toner removed from an image carrier in a direction of the axis. The plurality of scraping pieces are arranged in the direction of the axis. The plurality of scraping pieces are configured to be turnable so as to alternately come into contact with the rotating shaft and the spiral blade to scrape the toner adhered on the rotating shaft. A width of the scraping piece in the direction of the axis is equal to or below ½ of a gap between the adjacently arranged scraping pieces in the direction of the axis.

An image forming apparatus includes a main body housing, a photosensitive drum, an exposure device, a developing device, a toner container, a transfer roller, a fixing device, a cleaner and a waste toner container. The main body housing includes a front wall and a rear wall opposite to the front wall in a horizontal direction. The photosensitive drum is located further from the front wall than the photosensitive being from the rear wall. The toner container includes a first front end. The waste toner container including a second front end. A distance between the second front end of the waste toner container and the front wall of the main body housing in the horizontal direction is smaller than a distance between the first front end of the toner container and the front wall of the main body housing in the horizontal direction.

An image forming apparatus, comprising: a body casing; a drum unit; a belt unit; and a waste toner storage unit, the drum unit comprising: a photosensitive drum; a cleaning unit; and a conveying unit configured to convey toner removed by the cleaning unit, the belt unit comprising: a belt and a unit electric contact, the conveying unit comprises: a conveying member to convey the toner removed by the cleaning unit in a moving direction of the drum unit; and a conveying tube having a discharging outlet configured to let toner carried by the conveying member be discharged to the waste toner storage unit, wherein the discharging outlet is disposed on a downstream side with respect to a body electric contact in a direction pointing from an inside position to an outside position of the drum unit in a state where the drum unit is disposed at the inside position.

A developing device includes a developer container to contain developer including toner and magnetic carrier, the developer container; a developer bearer to carry, by rotation, the developer to a developing range facing a latent image bearer; a communication opening in a wall defining the developer container; a toner conveyance passage connected to the communication opening; and a cylindrical magnet having a magnetic pole arrangement parallel to an axis of the cylindrical magnet. The cylindrical magnet is disposed to enclose a space overlapping with the communication opening on a cross section perpendicular to the axis of the cylindrical magnet.

A rotational force is transmitted to a main assembly side feeding member for feeding the toner into a main assembly side toner accommodating portion from a coupling member provided on a cartridge.

The cartridge includes a photosensitive drum, a discharge opening configured to discharge the toner removed from the photosensitive drum toward the main assembly side feeding member, and a coupling member configured to transmit the rotational force to the main assembly side feeding member. The coupling member is movable between a first position for transmitting the rotational force to the main assembly side feeding member and a second position retracted from the first position.

A toner conveying device includes a case that can store therein toner to be conveyed, a conveyance member rotatably supported at both ends thereof by the case and configured to rotate to convey the toner inside the case in a conveying direction set in advance, and a pushing member pushed against the conveyance member and configured to slide on an outer peripheral portion of the conveyance member as the conveyance member rotates. The pushing member includes a first sheet member having flexibility and abutting on the outer peripheral portion in a first direction intersecting with a rotational axis direction of the conveyance member to push the conveyance member and a second sheet member having flexibility and abutting on the outer peripheral portion in a second direction, which is different from the first direction, intersecting with the rotational axis direction to push the conveyance member.

A first cartridge support is configured to support a drum cartridge. The first cartridge support is configured to move in a first direction between a first position at which the drum cartridge is mounted on a housing and a second position at which the drum cartridge is detachable. A second cartridge support is configured to support a development cartridge. The second cartridge support is configured to move in the first direction between a third position at which the development cartridge is mounted on the drum cartridge and a fourth position at which the development cartridge is detachable. In a state where the second cartridge support is located at the third position, the second cartridge support is located between the first cartridge support located at the first position and a cover located at a closed position with respect to the first direction.

An image forming apparatus (1) includes a casing (21) having a toner conveyance path (34); a screw (24) conveying a toner in the toner conveyance path (34) in a predetermined conveyance direction; and a downstream side bearing (25) rotatably supporting a downstream side end portion of the screw (24) in the conveyance direction, wherein the screw (24) includes: a shaft (51) extending in the conveyance direction; and a spiral fin (52) provided around an outer circumferential face of the shaft (51), the shaft (51) has a downstream side insertion part (54) inserted into the downstream side bearing (25), and the downstream side insertion part (54) has an outer diameter larger than an outer diameter of a downstream side end portion of the fin (52) in the conveyance direction.

A waste toner storage case includes a case main body, a waste toner path, a conveyance portion, a conversion portion, and a moving member. The waste toner path is provided in the case main body. The conversion portion converts a rotary motion into a reciprocating motion in conjunction with a rotation of the rotation shaft. The moving member is coupled with the conversion portion, reciprocatingly moves in a direction along the inclined guide surface in accordance with the reciprocating motion from the conversion portion, and includes: a first extending portion extending from the coupling portion to the reception port; and a second extending portion extending from the coupling portion to the reception port to make a predetermined angle with respect to the first extending portion in a first direction separating from the inclined guide surface.

In an image forming apparatus, a drum cartridge includes a photosensitive drum, a developing device, a drum cleaner, a waste toner tube, and a flange. The waste toner tube includes a first end portion communicating with the drum cleaner and a second end portion connected to the flange. The developing device includes a protruding portion facing the flange. The cushion member is located between the flange and the protruding portion. The cushion member allows a cartridge mounting part of the developing device to move with respect to the flange in a case where the developing device moves with respect to the photosensitive drum.