Abstract: A developing device includes a developer bearer the surface of which moves with a developer thereon, a development housing including the developer in an inner space thereof and an opening through which the surface of the developer bearer is partially exposed in a direction of surface movement thereof to face a latent image bearer a surface of which moves with a latent image thereon, a drive assembly disposed in the development housing, configured to drive members in the development housing driven by a driven force of the drive assembly, and a collision assembly including a collision member, the collision assembly being configured to move the collision member away from the development housing and toward the development housing to collide the collision member with the development housing, utilizing the drive force of the drive assembly.

Abstract: A developing device includes a casing to contain developer and define a developer circulation passage, a developing roller to bear the developer, and at least one developer conveyor to convey the developer. The developer conveyor is disposed in the developer circulation passage and lower than the developing roller. The developing device satisfies M1/L2>0.56 g/cm and M1/M2>0.50, where M1 represents an amount of developer borne on the developing roller, L1 represents a width in which the developing roller bears the developer in a longitudinal direction of the developing roller; and M2 represents an amount of developer stored in the casing and excluding the amount of developer borne.

Abstract: A powder conveying device includes: a conveying nozzle, provided with a powder receiving opening; an open/close member to open/close the powder receiving opening; a flange provided to the open/close member; a biasing member to bias the open/close member; and a container setting section to which a part of a powder container is to be fit. The powder container includes: a conveyor to convey the powder from a second end of the powder container to a first end; a container opening protruding from the first end; a nozzle receiving opening into which the conveying nozzle is to be inserted; and a butting portion provided in the container opening, to butt against the flange. When the powder container is attached to the powder conveying device, the container opening is fitted to the container setting section, and the flange and the biasing member are housed in an inner space of the container opening.

Abstract: A developing device includes a casing to contain developer and define a developer circulation passage, a developing roller to bear the developer, and at least one developer conveyor to convey the developer. The developer conveyor is disposed in the developer circulation passage and lower than the developing roller. The developing device satisfies M1/L2>0.56 g/cm and M1/M2>0.50, where M1 represents an amount of developer borne on the developing roller, L1 represents a width in which the developing roller bears the developer in a longitudinal direction of the developing roller; and M2 represents an amount of developer stored in the casing and excluding the amount of developer borne.

Abstract: A powder conveying device includes: a conveying nozzle, provided with a powder receiving opening; an open/close member to open/close the powder receiving opening; a flange provided to the open/close member; a biasing member to bias the open/close member; and a container setting section to which a part of a powder container is to be fit. The powder container includes: a conveyor to convey the powder from a second end of the powder container to a first end; a container opening protruding from the first end; a nozzle receiving opening into which the conveying nozzle is to be inserted; and a butting portion provided in the container opening, to butt against the flange. When the powder container is attached to the powder conveying device, the container opening is fitted to the container setting section, and the flange and the biasing member are housed in an inner space of the container opening.

Abstract: A developing device includes a developer bearer the surface of which moves with a developer thereon, a development housing including the developer in an inner space thereof and an opening through which the surface of the developer bearer is partially exposed in a direction of surface movement thereof to face a latent image bearer a surface of which moves with a latent image thereon, a drive assembly disposed in the development housing, configured to drive members in the development housing driven by a driven force of the drive assembly, and a collision assembly including a collision member, the collision assembly being configured to move the collision member away from the development housing and toward the development housing to collide the collision member with the development housing, utilizing the drive force of the drive assembly.

Abstract: A developing device includes a casing to contain developer, a developer bearer disposed in the casing and opposite a latent image bearer in a developing range, at least one developer contact face to which the developer adheres in image formation, and a vibrator to give vibration to the developer contact face in a non-image formation period. The developer bearer is to rotate to supply the developer to the latent image bearer in the developing range.

Abstract: A nozzle insertion member is in a powder container that includes a nozzle insertion opening into which a conveying nozzle is inserted. The nozzle insertion member includes an opening/closing structure to move to an opening position to open the nozzle insertion opening by being pressed by the inserted conveying nozzle, and to a closing position to close the nozzle insertion opening when the conveying nozzle is separated from the nozzle insertion member, and a seal arranged at the nozzle insertion opening and including a through hole into which the conveying nozzle is insertable. The opening/closing structure includes a front cylindrical portion to contact with an inner surface of the through hole, and a slide area formed on another side relative to the front cylindrical portion. W1<W4 is satisfied, where W1 is an inner diameter of the through hole, and W4 is an outer diameter of the slide area.

Abstract: A developing device includes a developer bearer including a magnetic field generator, a developer regulator disposed opposite the developer bearer across a regulation gap, a developer containing compartment disposed below the developer bearer, and a conveying screw disposed in the developer containing compartment and including a shaft having a diameter greater than a radius of the conveying screw. On a cross section perpendicular to an axial direction of the conveying screw, a developer scooping pole of the magnetic field generator to scoop the developer from the developer containing compartment onto the developer bearer is disposed between the regulation gap and a bisector dividing an angle extending from a first line, which connects a center of the developer bearer and a center of the conveying screw, to a second line, which connects the center of the developer bearer and the regulation gap, in a rotation direction of the developer bearer.

Abstract: A nozzle insertion member arranged in a powder container includes a nozzle insertion opening; an opening/closing member opening/closing the nozzle insertion opening; a supporting member supporting the opening/closing member; and a biasing member provided to the supporting member to bias the opening/closing member toward a closing position. When the powder is supplied to the conveying nozzle along with rotation of a rotary conveyor arranged inside the powder container, the supporting member rotates with the rotation of the conveyor. The opening/closing member is rotated by a drive transmitting mechanism with rotation of the supporting member. The mechanism includes an elongated member arranged on the opening/closing member and penetrating through an opening formed on the supporting member; and a drive transmitted portion formed on the elongated member; and a drive transmitting portion formed on an inner surface of the opening and configured to come into contact with the drive transmitted portion.

Abstract: A developing device includes a casing to contain developer, a developer bearer disposed in the casing and opposite a latent image bearer in a developing range, at least one developer contact face to which the developer adheres in image formation, and a vibrator to give vibration to the developer contact face in a non-image formation period. The developer bearer is to rotate to supply the developer to the latent image bearer in the developing range.

Abstract: A nozzle insertion member arranged in a powder container includes a nozzle insertion opening; an opening/closing member opening/closing the nozzle insertion opening; a supporting member supporting the opening/closing member; and a biasing member provided to the supporting member to bias the opening/closing member toward a closing position. When the powder is supplied to the conveying nozzle along with rotation of a rotary conveyor arranged inside the powder container, the supporting member rotates with the rotation of the conveyor. The opening/closing member is rotated by a drive transmitting mechanism with rotation of the supporting member. The mechanism includes an elongated member arranged on the opening/closing member and penetrating through an opening formed on the supporting member; and a drive transmitted portion formed on the elongated member; and a drive transmitting portion formed on an inner surface of the opening and configured to come into contact with the drive transmitted portion.

Abstract: A nozzle insertion member arranged in a powder container includes a nozzle insertion opening; an opening/closing member opening/closing the nozzle insertion opening; a supporting member supporting the opening/closing member; and a biasing member provided to the supporting member to bias the opening/closing member toward a closing position. When the powder is supplied to the conveying nozzle along with rotation of a rotary conveyor arranged inside the powder container, the supporting member rotates with the rotation of the conveyor. The opening/closing member is rotated by a drive transmitting mechanism with rotation of the supporting member. The mechanism includes an elongated member arranged on the opening/closing member and penetrating through an opening formed on the supporting member; and a drive transmitted portion formed on the elongated member; and a drive transmitting portion formed on an inner surface of the opening and configured to come into contact with the drive transmitted portion.

Abstract: The powder container includes a container body containing a powder for image formation, the powder being to be supplied to a powder replenishing device; a conveyor configured to convey the powder from one end in a longitudinal direction to the other end at which a cylindrical container opening is formed, the conveyor being provided inside the container body; a gear configured to rotate the conveyor with an external driving force; a container cover configured to cover the gear, the container cover having a gear exposing hole for partially exposing a gear tooth; and a nozzle receiver configured to guide the conveying nozzle inside of the container body, the nozzle receiver being provided on the container opening. The container cover includes a container engaged portion provided outer than the tooth of the gear in a radial direction.

Abstract: The powder container includes a container body containing a powder for image formation, the powder being to be supplied to a powder replenishing device; a conveyor configured to convey the powder from one end in a longitudinal direction to the other end at which a cylindrical container opening is formed, the conveyor being provided inside the container body; a gear configured to rotate the conveyor with an external driving force; a container cover configured to cover the gear, the container cover having a gear exposing hole for partially exposing a gear tooth; and a nozzle receiver configured to guide the conveying nozzle inside of the container body, the nozzle receiver being provided on the container opening. The container cover includes a container engaged portion provided outer than the tooth of the gear in a radial direction.

Abstract: A developing device includes a developer bearer including a magnetic field generator, a developer regulator disposed opposite the developer bearer across a regulation gap, a developer containing compartment disposed below the developer bearer, and a conveying screw disposed in the developer containing compartment and including a shaft having a diameter greater than a radius of the conveying screw. On a cross section perpendicular to an axial direction of the conveying screw, a developer scooping pole of the magnetic field generator to scoop the developer from the developer containing compartment onto the developer bearer is disposed between the regulation gap and a bisector dividing an angle extending from a first line, which connects a center of the developer bearer and a center of the conveying screw, to a second line, which connects the center of the developer bearer and the regulation gap, in a rotation direction of the developer bearer.

Abstract: A developing device includes a developer bearer to bear developer, a developer containing compartment disposed lower than the developer bearer, and a conveying screw disposed in the developer containing compartment. The developing device further includes an inclined face extending from an inner wall of the developer containing compartment obliquely upward toward the developer bearer, and the inclined face opposes the conveying screw from above.

Abstract: A powder conveying device includes: a conveying nozzle, provided with a powder receiving opening; an open/close member to open/close the powder receiving opening; a flange provided to the open/close member; a biasing member to bias the open/close member; and a container setting section to which a part of a powder container is to be fit. The powder container includes: a conveyor to convey the powder from a second end of the powder container to a first end; a container opening protruding from the first end; a nozzle receiving opening into which the conveying nozzle is to be inserted; and a butting portion provided in the container opening, to butt against the flange. When the powder container is attached to the powder conveying device, the container opening is fitted to the container setting section, and the flange and the biasing member are housed in an inner space of the container opening.

Abstract: A powder container contains powder and is attached to an image forming apparatus including: a conveying nozzle to convey the powder; a powder receiving hole of the conveying nozzle to receive the powder from the powder container; an apparatus main-body gear to transmit a driving force to the powder container; and a container receiving section including the conveying nozzle and receiving the powder container. The powder container includes: an opening at one end of the powder container in a longitudinal direction; a nozzle receiver at the opening to receive the conveying nozzle; a conveyor to convey the powder; and a container gear to drive the conveyor by meshing with the apparatus main-body gear. The container gear is to mesh with the apparatus main-body gear at a position closer to the opening than the powder receiving hole in the longitudinal direction. The opening is to mate with the container receiving section.

Abstract: A powder conveying device includes: a conveying nozzle, provided with a powder receiving opening; an open/close member to open/close the powder receiving opening; a flange provided to the open/close member; a biasing member to bias the open/close member; and a container setting section to which a part of a powder container is to be fit. The powder container includes: a conveyor to convey the powder from a second end of the powder container to a first end; a container opening protruding from the first end; a nozzle receiving opening into which the conveying nozzle is to be inserted; and a butting portion provided in the container opening, to butt against the flange. When the powder container is attached to the powder conveying device, the container opening is fitted to the container setting section, and the flange and the biasing member are housed in an inner space of the container opening.