Abstract: A photoelectric conversion device including a plurality of substrates in a stacked state, the plurality of substrates including a first substrate and a second substrate electrically connected to each other, the photoelectric conversion device comprising: a memory cell unit including row-selection lines that are to be driven upon selection of a row of a memory cell array and column-selection lines that are to be driven upon selection of a column of the memory cell array; and a memory peripheral circuit unit that includes row-selection line connection portions and column-selection line connection portions so as to drive the row-selection lines and to drive the column-selection lines, wherein a first portion that is at least a part of the memory peripheral circuit unit is formed on the first substrate and the memory cell unit is formed on the second substrate.

Abstract: A rotor is a rotor for a pump. The rotor includes a rotor core having a magnet insertion hole and having an annular shape about an axis, a permanent magnet inserted in the magnet insertion hole, and a rotor cover surrounding the rotor core from outside in a radial direction about the axis. The rotor core has a first core portion disposed on an inner side of the magnet insertion hole in the radial direction, a second core portion disposed on an outer side of the magnet insertion hole in the radial direction, and a hole separating the first core portion and the second core portion from each other. The rotor cover has a positioning portion that positions the first core portion and the second core portion in a circumferential direction about the axis.

Abstract: A mechanism that enables developer replenishment by a simpler structure and a mechanism that enables more user-friendly developer replenishment are provided. An attachment port to which a developer supply bottle containing a developer stored therein is detachably attachable is disposed in an interior of an image forming apparatus. The developer supply bottle can be attached when the cover is in an open state. According to this image forming apparatus, when the developer supply bottle is attached to the attachment port, the developer inside the developer supply bottle moves into a developer housing chamber by its own weight.

Abstract: A cartridge attachable to and detachable from an image forming apparatus forming an image on a recording material, the cartridge includes: an image bearing member; a developer container that contains therein a developer; a developing member that is rotatable and carries the developer supplied from the developer container and supplies the developer to the image bearing member; a developer supplying member that is rotatable and provided in the developer container and in contact with the developing member to supply the developer to a surface of the developing member; and a contact member provided in the developer container and in contact with a surface of the developer supplying member, wherein the developer remaining on the image bearing member after image formation is collected to the developing member, and the developer collected to the developing member is collected into the developer container.

Abstract: Provided are an image bearing member; a charging member that charges the image bearing member; an exposure unit that exposes the image bearing member; a developing unit that develops an electrostatic latent image as a developer image by supplying a developer, charged to regular polarity, to the image bearing member; a transfer member that transfers the developer image to a transfer-receiving body; and a collecting member that collects a deposit on the image bearing member downstream of a transfer portion of the image bearing member at which the developer image is transferred to the transfer-receiving body by the transfer member, and upstream of a charging portion of the image bearing member charged by the charging member, in a rotation direction of the image bearing member. After transfer of the developer image to the transfer-receiving body, the developer remaining on the image bearing member is collected by the developing unit.

Abstract: A rotor includes: a rotor core including first electromagnetic steel sheets and second electromagnetic steel sheets; and a permanent magnet. Each of the first electromagnetic steel sheets includes a first magnet insertion hole, a first thin portion, and a magnet locking portion that is in contact with an end portion of the permanent magnet. Each of the second electromagnetic steel sheets includes a second magnet insertion hole and a second thin portion. Each of the second electromagnetic steel sheets does not include a portion that is in contact with the end portion of the permanent magnet. W1>W2 is satisfied, where W1 is a minimum width of the first thin portion and W2 is a minimum width of the second thin portion.

Abstract: A rotor includes a rotor core formed of a stacked body in which two or more first electromagnetic steel sheets and a second electromagnetic steel sheet are stacked in a direction of an axis, the rotor core having a magnet insertion hole passing through the stacked body in the direction of the axis, and a first permanent magnet and a second permanent magnet disposed in the magnet insertion hole. The magnet insertion hole has a first region in which the first permanent magnet is inserted, and a second region in which the second permanent magnet is inserted. Each of the two or more first electromagnetic steel sheets has a bridge dividing the magnet insertion hole into the first region and the second region. The second electromagnetic steel sheet has the magnet insertion hole in which the first region and the second region are formed continuously with each other.

Abstract: A cartridge attachable to and detachable from an image forming apparatus forming an image on a recording material, the cartridge includes: an image bearing member; a developer container that contains therein a developer; a developing member that is rotatable and carries the developer supplied from the developer container and supplies the developer to the image bearing member; a developer supplying member that is rotatable and provided in the developer container and in contact with the developing member to supply the developer to a surface of the developing member; and a contact member provided in the developer container and in contact with a surface of the developer supplying member, wherein the developer remaining on the image bearing member after image formation is collected to the developing member, and the developer collected to the developing member is collected into the developer container.

Abstract: A photoelectric conversion device comprising: a first substrate that includes a pixel circuit including a photoelectric conversion element; a second substrate having a signal processing circuit that drives the pixel circuit or processes a signal from the pixel circuit; a connection part electrically connecting the first substrate and the second substrate; and an inspection circuit, wherein the inspection circuit is formed in one of the first and second substrates and is connected to a wire supplying a first potential and being provided in the one of the first and second substrates, and the inspection circuit is connected via the connection part to a wire supplying a second potential and being provided in the other of the first and second substrates.

Abstract: A rotor includes at least one first permanent magnet and a second permanent magnet and has 2n (n is a natural number) magnetic poles. The at least one first permanent magnet forms part of an outer peripheral surface of the rotor and is magnetized to have polar anisotropy. The second permanent magnet is adjacent to the at least one first permanent magnet in a circumferential direction of the rotor, and has lower magnetic force than magnetic force of the at least one first permanent magnet. The second permanent magnet has 3×2n magnetic poles.

Abstract: Provided are an image bearing member; a charging member that charges the image bearing member; an exposure unit that exposes the image bearing member; a developing unit that develops an electrostatic latent image as a developer image by supplying a developer, charged to regular polarity, to the image bearing member; a transfer member that transfers the developer image to a transfer-receiving body; and a collecting member that collects a deposit on the image bearing member downstream of a transfer portion of the image bearing member at which the developer image is transferred to the transfer-receiving body by the transfer member, and upstream of a charging portion of the image bearing member charged by the charging member, in a rotation direction of the image bearing member. After transfer of the developer image to the transfer-receiving body, the developer remaining on the image bearing member is collected by the developing unit.

Abstract: A magnetization ring is disposed between a rotor and a core portion surrounding the rotor, the rotor having permanent magnets and inter-pole portions which are arranged in a circumferential direction about an axis. The magnetization ring has a magnetic portion facing the center of the permanent magnet in the circumferential direction, and a nonmagnetic portion facing the inter-pole portion of the rotor.

Abstract: An electric motor includes a stator assembly, a rotor provided inside the stator assembly, and a heat sink to radiate heat from the stator assembly. The heat sink includes a base portion, and a heat radiating portion formed integrally with the base portion.

Abstract: A sensor magnet includes a first magnetic pole part including a magnetic pole of a first polarity and a second magnetic pole part including a magnetic pole of a second polarity. A thickness of the first magnetic pole part in a direction toward a magnetic sensor is larger than a thickness of the second magnetic pole part in a direction toward the magnetic sensor.

Abstract: A rotor includes a rotor core including a magnet insertion hole and an opening and a permanent magnet inserted in the magnet insertion hole and forming a first magnetic pole. The rotor satisfies L1<L2, where L1 is a first maximum width of the opening in a direction perpendicular to a radial direction and L2 is a second maximum width of the opening in the radial direction. A distance from the opening to the magnet insertion hole is smallest at a magnetic pole center of the first magnetic pole.

Abstract: An image forming apparatus to and from which a replenishment container accommodating toner is attachable and detachable includes an opening/closing portion moving from a closed position to an open position in a case where the toner replenishment container attached to a replenishment port is rotated, and a locking membered to move between a restricting position restricting movement of the opening/closing portion from the closed position to the open position, and an allowing position in which the movement of the opening/closing portion from the closed position to the open position is allowed. In addition, a controller, in a case where a replenishment operation, in which toner is supplied from the replenishment container to the replenishment port, displays, on a display, a ratio corresponding to an amount of toner accommodated in the developer container after the replenishment operation.

Abstract: A rotor includes a rotor core and a permanent magnet. The rotor core includes an outside slit provided between a permanent magnet insertion hole and an outer peripheral surface of the rotor core, and inside slits provided between a magnetic pole center part and the outside slit. A minimum distance from a first inside slit to the outer peripheral surface of the rotor core is longer than a minimum distance from any other inside slit except the first inside slit to the outer peripheral surface of the rotor core.

Abstract: An image forming apparatus includes a photosensitive member, a transfer member, a transfer power source, and a control unit. At a start time of a start-up operation at the time of starting an image forming operation, on the surface of the photosensitive member, a first position coincides with a charging position, and a third position coincides with a transfer position. During a period in which an area on the photosensitive member located between the first position and the third position in a rotation direction of the photosensitive member passes the transfer position, the control unit performs control of applying a first voltage having the same polarity as a normal charging polarity of toner to the transfer member by the transfer power source, and, at a predetermined timing, changing a voltage from the first voltage to a second voltage having an absolute value less than that of the first voltage.

Abstract: A rotor includes a rotor core having an outer circumference extending in a circumferential direction about an axis, and having a magnet insertion hole along the outer circumference, and a permanent magnet disposed in the magnet insertion hole. The rotor core has a plurality of slits formed on an outer side of the magnet insertion hole in a radial direction about the axis, and a bridge extending to connect an inner side and an outer side of the magnet insertion hole in the radial direction. The plurality of slits have a first slit closest to an end of the magnet insertion hole in the circumferential direction, and a second slit closest to the bridge. When T1 represents a shortest distance from the magnet insertion hole to the first slit and R1 represents a shortest distance from the reference point to the second slit, R1>T1 is satisfied.

Abstract: An image forming apparatus includes a first display portion to display a ratio of an amount of toner accommodated in the developer container to a maximum amount of toner that the developer container is capable of accommodating, and a controller to, in a case where a replenishment operation, in which toner is supplied from the replenishment container to the replenishment port, is performed when a second display portion is in a second state, switch the second display portion from the second state to a first state and perform a display processing of displaying, on the first display portion, the ratio corresponding to an amount of toner accommodated in the developer container after the replenishment operation.