Abstract: A damping component includes a base with an attachment portion to be attached to a vibrated member, a damping member disposed at an outer circumferential side of the base while being compressed, and a holding portion disposed at an outer circumferential side of the damping member and compressively holding the damping member. The damping member has rigidity lower than rigidity of the base and rigidity of the holding portion and has a loss factor, measured by a mechanical impedance method in a state being compressed between the base and the holding portion, of 0.05 or more.

Abstract: A damping structure includes a first frame on which a driving portion is mounted, a second frame provided at a position facing the first frame in a state being connected with the first frame, a projecting portion provided projectively from one frame toward the other frame of the first and second frames, and a damping member compressively held between the projecting portion and the other frame. The damping member has rigidity lower than rigidities of the first and second frames and of the projecting portion and has a loss factor, measured by a mechanical impedance method in the state being compressed between the projecting portion and the other frame, of 0.05 or more.

Abstract: An image forming apparatus includes a main body, a cover, a driving unit, and a film. The main body is configured to accommodate an image forming portion which forms an image on a recording material. The cover is provided on the main body and covers the image forming portion. The driving unit is provided on the main body and drives the image forming portion. The film is attached to the cover with a gap formed against an inner wall of the cover. The film faces the inner wall of the cover while a tension is given thereto and without coming into contact with the driving unit.

Abstract: A dumping structure includes a first frame on which a driving portion is mounted, a second frame, a fixture fixing the first frame to the second frame, a restrict portion, provided around the fixture and provided between the first and second frames, which restricts a distance between the first and second frames, and a damping member, provided around the restrict portion, which is compressed by the first and second frame. The damping member has rigidity lower than rigidity of the first frame, rigidity of the second frame and rigidity of the restrict portion, and has a loss factor, measured by a mechanical impedance method in the state being compressed between the first and second frames, of 0.05 or more.

Abstract: An image forming apparatus includes: a main body configured to accommodate an image forming portion which forms an image on a recording material; a cover which is provided on the main body and covers the image forming portion; a driving unit which is provided on the main body and drives the image forming portion; and a film attached to the cover with a gap formed against an inner wall of the cover, the film facing the inner wall of the cover while a tension is given thereto and without coming into contact with the driving unit.

Abstract: Included is a fixation portion having one end joined with a flat plate, and the other end fixed to a support plate that supports at least a part of a drive transmission portion including a drive transmission member that transits driving force caused in a drive source, and a length in a longitudinal direction and a length in a short direction are set such that a first vibration frequency vibrating in the longitudinal direction of the flat plate and a second vibration frequency vibrating in the short direction of the flat plate respectively resonate with mutually different vibration frequencies caused in the support plate around a portion where the fixation portion and the flat plate are joined.

Abstract: A damping structure includes a first frame on which a driving portion is mounted, a second frame provided at a position facing the first frame in a state being connected with the first frame, a project portion provided projectively from one frame toward the other frame among the first and second frames, and a damping member compressively held between the project portion and the other frame. The damping member has rigidity lower than rigidities of the first and second frames and of the project portion and has a loss factor, measured by a mechanical impedance method in the state being compressed between the project portion and the other frame, of 0.05 or more.

Abstract: A damping component includes a base with an attachment portion to be attached to a vibrated member, a damping member disposed at an outer circumferential side of the base while being compressed, and a holding portion disposed at an outer circumferential side of the damping member and compressively holding the damping member. The damping member has rigidity lower than rigidity of the base and rigidity of the holding portion and has a loss factor, measured by a mechanical impedance method in a state being compressed between the base and the holding portion, of 0.05 or more.

Abstract: A dumping structure includes a first frame on which a driving portion is mounted, a second frame, a fixture fixing the first frame to the second frame, a restrict portion, provided around the fixture and provided between the first and second frames, which restricts a distance between the first and second frames, and a damping member, provided around the restrict portion, which is compressed by the first and second frame. The damping member has rigidity lower than rigidity of the first frame, rigidity of the second frame and rigidity of the restrict portion, and has a loss factor, measured by a mechanical impedance method in the state being compressed between the first and second frames, of 0.05 or more.

Abstract: An amount-of-developer regulating apparatus configured to restrict the amount of developer carried on a developer bearing member. The amount-of-developer regulating apparatus includes a flexible developer amount regulation member having a contact portion configured to contact with a developer bearing member, and first and second holding portions configured to hold the developer amount regulation member and to contact with the developer amount regulation member at further upstream and further downstream in a direction where the developer bearing member is rotationally moved than the contact portion. With a pressure distribution of the contact portion as to the developer bearing member, there are a plurality of local maximum values in the direction where the developer bearing member is rotationally moved. Thus, the apparatus can be reduced in size, and also image concentration unevenness after long-term use can be prevented.

Abstract: An electrophotographic photosensitive drum with a simple structure for realizing a seamless digital photosensitive drum having an exposure source and a photosensitive member which are integrated with each other. The electrophotographic photosensitive drum includes a self-luminous device portion, a functional separation portion, and a photosensitive portion. The self-luminous device portion includes a first electrode wire layer including multiple first electrode wires provided in a circumferential direction of a cylindrical substrate and arrayed in a longitudinal direction of the cylindrical substrate so as to be separated from each other by an insulating member, and each of the multiple first electrode wires is annularly formed.

Abstract: An amount-of-developer regulating apparatus configured to restrict the amount of developer carried on a developer bearing member. The amount-of-developer regulating apparatus includes a flexible developer amount regulation member having a contact portion configured to contact with a developer bearing member, and first and second holding portions configured to hold the developer amount regulation member and to contact with the developer amount regulation member at further upstream and further downstream in a direction where the developer bearing member is rotationally moved than the contact portion. With a pressure distribution of the contact portion as to the developer bearing member, there are a plurality of local maximum values in the direction where the developer bearing member is rotationally moved. Thus, the apparatus can be reduced in size, and also image concentration unevenness after long-term use can be prevented.

Abstract: An amount-of-developer regulating apparatus configured to restrict the amount of developer carried on a developer bearing member. The amount-of-developer regulating apparatus includes a flexible developer amount regulation member having a contact portion configured to contact with a developer bearing member, and first and second holding portions configured to hold the developer amount regulation member and to contact with the developer amount regulation member at further upstream and further downstream in a direction where the developer bearing member is rotationally moved than the contact portion. With a pressure distribution of the contact portion as to the developer bearing member, there are a plurality of local maximum values in the direction where the developer bearing member is rotationally moved. Thus, the apparatus can be reduced in size, and also image concentration unevenness after long-term use can be prevented.

Abstract: A simple structure of a digital photosensitive drum having an exposure source and a photosensitive member which are integrated with each other. The drum is mountable to a structure of a conventional electrophotographic image forming process. An interval between phase detecting patterns of an encoder wheel portion which is rotated with the drum is equal to or smaller than an interval between a charging position and a developing position. During an image forming process, a timing for each pixel to be driven to emit light is controlled based on a phase detection value.

Abstract: A sheet-shaped regulation member is supported by a supporting unit with an elastic force occurring by bending a sheet-shaped regulation member in the longitudinal direction thereof, and a force received as a result of being pressed by a developing roller. Thus, direct contact can be securely made onto a developer bearing member, and a regulation member can be provided which enables easily attaching thereof to the supporting member, as well as enabling a developing apparatus, processing cartridge, and image forming apparatus, to be reduced in size.

Abstract: A cleaning member configured to remove developer from an electrophotographic photosensitive member includes a longitudinally-shaped planar elastic blade that comes into contact with the electrophotographic photosensitive member to remove the developer from a surface thereof; and a holder supporting the elastic blade. The holder includes an engaging part that engages with the frame to secure the cleaning member to the frame; and a supporting part that holds the elastic blade inside the engaging part to support the elastic blade in the thickness direction thereof.

Abstract: A simple structure of a digital photosensitive drum having an exposure source and a photosensitive member which are integrated with each other. The drum is mountable to a structure of a conventional electrophotographic image forming process. An interval between phase detecting patterns of an encoder wheel portion which is rotated with the drum is equal to or smaller than an interval between a charging position and a developing position. During an image forming process, a timing for each pixel to be driven to emit light is controlled based on a phase detection value.

Abstract: An electrophotographic photosensitive drum with a simple structure for realizing a seamless digital photosensitive drum having an exposure source and a photosensitive member which are integrated with each other. The electrophotographic photosensitive drum includes a self-luminous device portion, a functional separation portion, and a photosensitive portion. The self-luminous device portion includes a first electrode wire layer including multiple first electrode wires provided in a circumferential direction of a cylindrical substrate and arrayed in a longitudinal direction of the cylindrical substrate so as to be separated from each other by an insulating member, and each of the multiple first electrode wires is annularly formed.

Abstract: A developer feeding screw, which includes a shaft and a helical shape portion around said shaft, for feeding a developer in a direction of an axis of said shaft by rotation about the axis, said feeding screw, the improvement residing in that: a sectional configuration of said helical shape portion in a plane including the axis satisfies: Z(r)=kln(ro/r) where z(r) is a height of said sectional configuration at radius r with z(ro)=0 (ro is an outer radius of the helical configuration): r is a radius (0<r?ro) k is a constant.

Abstract: An amount-of-developer regulating apparatus configured to restrict the amount of developer carried on a developer bearing member. The amount-of-developer regulating apparatus includes a flexible developer amount regulation member having a contact portion configured to contact with a developer bearing member, and first and second holding portions configured to hold the developer amount regulation member and to contact with the developer amount regulation member at further upstream and further downstream in a direction where the developer bearing member is rotationally moved than the contact portion. With a pressure distribution of the contact portion as to the developer bearing member, there are a plurality of local maximum values in the direction where the developer bearing member is rotationally moved. Thus, the apparatus can be reduced in size, and also image concentration unevenness after long-term use can be prevented.