Abstract: An image forming apparatus including a main body casing, a drum cartridge, a developing cartridge, and an intermediate transfer belt. The drum cartridge includes a photosensitive drum, a drum frame, and a first memory. The intermediate transfer belt is positioned above of the drum cartridge and the developing cartridge in a state where the drum cartridge and the developing cartridge are attached to the main body casing. The drum frame includes a first end and a second end being apart from the first end in an up-down direction. The photosensitive drum is positioned at the first end. The first memory is positioned at the second end.

Abstract: An image forming apparatus, having a photosensitive drum assembly, an exposure head, and a bearing, is provided. The photosensitive drum assembly includes a photosensitive drum and a flange disposed at an end of the photosensitive drum in an axial direction of an axis of the photosensitive drum. The flange contacts an inner surface of the photosensitive drum. The exposure head includes a plurality of light emitters aligned along the axial direction of the photosensitive drum, a lens array focusing light from the light emitters on the photosensitive drum, and a head frame to support the light emitters and the lens array. The bearing has a first contact face to contact the exposure head to define a distance between the lens array and the photosensitive drum along a direction of an optical axis of the light.

Abstract: A wiring member includes a wiring body and a pattern. The wiring body includes a plurality of wire-like transmission members and a base material. The plurality of wire-like transmission members are fixed to the base material in an aligned state, and the pattern is provided on the wiring body. The pattern makes a two-dimensional position of at least a part of a portion related to the base material recognizable in the wiring body.

Abstract: A scanning optical system receives a light beam deflected by an optical deflector and forms an image on an image surface. A window member transmits the light beam deflected by the optical deflector. An optical sensor detects the light beam that passes through the window member. A frame has a mount surface on which the optical deflector is mounted. The frame includes a first wall having a first opening and a second opening. The light beam directed from the optical deflector toward the scanning optical system passes through the first opening. The light beam directed from the optical deflector toward the optical sensor passes through the second opening. The first opening is closed by a closest scanning lens to the optical deflector in the scanning optical system. The second opening is closed by the window member.

Abstract: A scanning optical device includes a semiconductor laser, a coupling lens, a polygon mirror, a motor circuit board, a cable harness, and a scanning optical system. The semiconductor laser is configured to emit light. The coupling lens is configured to convert the light emitted by the semiconductor laser into a light beam. The polygon mirror is configured to deflect the light beam converted by the coupling lens. The motor circuit board includes a motor configured to rotate the polygon mirror. The cable harness is configured to supply signals to the motor circuit board. The scanning optical system is configured to receive the light beam from the polygon mirror and to form an image on an image surface. The cable harness overlaps the light beam directed from the coupling lens toward the polygon mirror when viewed from an axial direction of a rotation axis of the polygon mirror.

Abstract: An image-forming apparatus includes: a housing having an opening; a top cover configured to cover the opening; a short-range wireless communication circuit board attached to the top cover; a relay circuit board attached to the top cover; and a first wiring connecting the short-range wireless communication circuit board and the relay circuit board to each other. The short-range wireless communication circuit board includes: an antenna configured to transmit/receive radio waves; and a circuit electrically connected to the antenna. At least a part of the circuit and at least a part of the relay circuit board are overlapped with each other in an up-down direction.

Abstract: A developing cartridge may include: a casing to accommodate developer; a storage medium including an electric contact surface; an elastic member extending in a first direction crossing the electric contact surface, and configured to be compressed or stretched in the first direction between a first state and a second state; and a holder including an outer surface positioned toward a side of the holder in the first direction, the electric contact surface positioned at the outer surface, and movable between first and second positions in the first direction relative to the casing. A length of the elastic member in the first direction is greater in the first state than in the second state. The electric contact surface is in the first position when the elastic member is in the first state, and the electric contact surface is in the second position when the elastic member is in the second state.

Abstract: A developing cartridge may include: a casing to accommodate developer; a storage medium including an electric contact surface; an elastic member extending in a first direction crossing the electric contact surface, and configured to be compressed or stretched in the first direction between a first state and a second state; and a holder including an outer surface positioned toward a side of the holder in the first direction, the electric contact surface positioned at the outer surface, and movable between first and second positions in the first direction relative to the casing. A length of the elastic member in the first direction is greater in the first state than in the second state. The electric contact surface is in the first position when the elastic member is in the first state, and the electric contact surface is in the second position when the elastic member is in the second state.

Abstract: An image forming apparatus including a main body casing, a drum cartridge, a developing cartridge, and an intermediate transfer belt. The drum cartridge includes a photosensitive drum, a drum frame, and a first memory. The intermediate transfer belt is positioned above of the drum cartridge and the developing cartridge in a state where the drum cartridge and the developing cartridge are attached to the main body casing. The drum frame includes a first end and a second end being apart from the first end in an up-down direction. The photosensitive drum is positioned at the first end. The first memory is positioned at the second end.

Abstract: In an image forming device, a controller converts continuous-tone image data to raster image data using a dither matrix. The continuous-tone image data includes pixels each has a tone value. The raster image data is binary image data corresponding to exposure areas. The dither matrix includes threshold values. The dither matrix is configured so that as an exposure area percentage of the raster image data increases, growth of the exposure area progresses according to a growth process including: a stage at which an exposure area extends in a predetermined screen direction from an isolated exposure area to connect with another isolated exposure area; and a stage at which after the isolated exposure area connects with another isolated exposure area, the exposure area extends in a crossing direction crossing the predetermined screen direction. The controller controls the exposure device to expose the photosensitive drum based on the raster image data.

Abstract: A developing cartridge may include: a casing configured to accommodate developer therein, the casing extending in the first direction; a coupling rotatable about a first axis extending in the first direction, the coupling being positioned at one side of the casing in the first direction; a detection gear rotatable about a second axis extending in the first direction, the detection gear being positioned at another side of the casing in the first direction; and a storage medium including an electric contact surface, the electric contact surface being positioned at the one side of the casing in the first direction.

Abstract: An image forming apparatus, having a photosensitive drum assembly, an exposure head, and a bearing, is provided. The photosensitive drum assembly includes a photosensitive drum and a flange disposed at an end of the photosensitive drum in an axial direction of an axis of the photosensitive drum. The flange contacts an inner surface of the photosensitive drum. The exposure head includes a plurality of light emitters aligned along the axial direction of the photosensitive drum, a lens array focusing light from the light emitters on the photosensitive drum, and a head frame to support the light emitters and the lens array. The bearing has a first contact face to contact the exposure head to define a distance between the lens array and the photosensitive drum along a direction of an optical axis of the light.

Abstract: A developing cartridge may include: a casing configured to accommodate developer therein, the casing extending in the first direction; a coupling rotatable about a first axis extending in the first direction, the coupling being positioned at one side of the casing in the first direction; a detection gear rotatable about a second axis extending in the first direction, the detection gear being positioned at another side of the casing in the first direction; and a storage medium including an electric contact surface, the electric contact surface being positioned at the one side of the casing in the first direction.

Abstract: A scanning optical device proposed herein includes first and second semiconductor lasers, first and second coupling lenses, a polygon mirror, and first and second holders. The first and second coupling lenses convert light emitted by the first and second semiconductor lasers into light beams, respectively. The polygon mirror deflects the light beams received from the first and second coupling lenses. The first holder has a seating surface on which the first coupling lens is fixed by a photo-curable resin. The second holder is configured to hold the second coupling lens in such a position that the first and second coupling lenses are arranged in a line parallel to a rotation axis of the polygon mirror. The second holder is fixed to the first holder by a photo-curable resin.

Abstract: A scanning optical device includes a light source, a polygon mirror, a motor, a scanning optical system, a frame, and a seating surface. The scanning optical system comprises a first scan lens, a second scan lens, and a reflecting mirror. The reflecting mirror is arranged to reflect a light beam toward the second scan lens. The reflecting mirror is supported on the seating surface. The seating surface allows adjustment of an angle of the reflecting mirror. The reflecting mirror reflects the light beam in a direction from the base wall toward the open side. A part of the reflecting mirror that overlaps the seating surface as viewed in a direction of thickness of the reflecting mirror is exposed to an outside of the frame and accessible from a side of the frame opposite to an open side of the frame.

Abstract: A scanning optical device includes a semiconductor laser, a coupling lens, a condenser lens, a deflector, a scanning optical system, a frame, and a first cover. The coupling lens converts light emitted by the first semiconductor laser to a light beam. The light beam received from the coupling lens is concentrated through the condenser lens. The deflector includes a polygon mirror configured to deflect the light beam received from the condenser lens. The scanning optical system directs the light beam deflected by the deflector toward an image plane. The deflector and the scanning optical system are fixed to the frame. The first cover covers at least a portion of the frame on which the deflector is located. The frame includes a wall having an opening through which a light beam traveling toward the polygon mirror passes. The condenser lens closes the opening.

Abstract: A developing cartridge may include: a casing configured to accommodate developer therein, the casing extending in the first direction; a coupling rotatable about a first axis extending in the first direction, the coupling being positioned at one side of the casing in the first direction; a detection gear rotatable about a second axis extending in the first direction, the detection gear being positioned at another side of the casing in the first direction; and a storage medium including an electric contact surface, the electric contact surface being positioned at the one side of the casing in the first direction.

Abstract: In an image forming device, a controller converts continuous-tone image data to raster image data using a dither matrix. The continuous-tone image data includes pixels each has a tone value. The raster image data is binary image data corresponding to exposure areas. The dither matrix includes threshold values. The dither matrix is configured so that as an exposure area percentage of the raster image data increases, growth of the exposure area progresses according to a growth process including: a stage at which an exposure area extends in a predetermined screen direction from an isolated exposure area to connect with another isolated exposure area; and a stage at which after the isolated exposure area connects with another isolated exposure area, the exposure area extends in a crossing direction crossing the predetermined screen direction. The controller controls the exposure device to expose the photosensitive drum based on the raster image data.

Abstract: An image forming apparatus, having a photosensitive drum assembly, an exposure head, and a bearing, is provided. The photosensitive drum assembly includes a photosensitive drum and a flange disposed at an end of the photosensitive drum in an axial direction of an axis of the photosensitive drum. The flange contacts an inner surface of the photosensitive drum. The exposure head includes a plurality of light emitters aligned along the axial direction of the photosensitive drum, a lens array focusing light from the light emitters on the photosensitive drum, and a head frame to support the light emitters and the lens array. The bearing has a first contact face to contact the exposure head to define a distance between the lens array and the photosensitive drum along a direction of an optical axis of the light.

Abstract: An image forming apparatus, having a photosensitive drum assembly, an exposure head, and a bearing, is provided. The photosensitive drum assembly includes a photosensitive drum and a flange disposed at an end of the photosensitive drum in an axial direction of an axis of the photosensitive drum. The flange contacts an inner surface of the photosensitive drum. The exposure head includes a plurality of light emitters aligned along the axial direction of the photosensitive drum, a lens array focusing light from the light emitters on the photosensitive drum, and a head frame to support the light emitters and the lens array. The bearing has a first contact face to contact the exposure head to define a distance between the lens array and the photosensitive drum along a direction of an optical axis of the light.