Abstract: A holding member includes a first side wall portion and a second side wall portion, and a part of a surface of a substrate on a side opposite from a mounting surface and a holding member are fixed to each other by an adhesive. In the first side wall portion, an inserting hole is disposed opposing a corner portion as of the substrate in a widthwise direction of the substrate and also, in the second side wall portion, another inserting hole is disposed opposing another corner portion of the substrate.

Abstract: A light-emitting diode exposure head includes a lens array, a long holder to hold the lens array, and a substrate having light-emitting diodes that emit light to expose a photosensitive member. The lens array includes lenses and condenses the light emitted from the light-emitting diodes on the photosensitive member. The long holder includes a base portion having an opening into which the lens array is inserted, and a pair of extended portions extended in a direction that is opposite of an emitting direction of the light along an optical axis of each of the lenses from both ends of the base portion in a transverse direction of the long holder. The pair of extended portions and the substrate are bonded in a state where leading edges of the pair of extended portions are in contact with a light-emitting surface of the substrate that serves as a surface of the substrate.

Abstract: A cleaning rod includes a rod-like member, a slidable portion which is provided on a free end side of the rod-like member with respect to a direction in which the cleaning rod is inserted and which is slidable on a light emergent surface of a lens of an image forming apparatus, and a restricting portion configured to restrict movement of the slidable portion in a direction away from the light emergent surface with respect to an optical axis direction by contacting the holder at each of free ends of opposing wall portions of a holder of the image forming apparatus from a side opposite from a side where a photosensitive member of the image forming apparatus is provided with respect to the optical axis direction in a state in which the slidable portion contacts the light emergent surface.

Abstract: A holding member includes a first opposing portion (first inner wall surface) and a second opposing portion (second inner wall surface) which oppose side wall surfaces of a lens array. Side wall surfaces of the lens array on opposite end sides with respect to a longitudinal direction of the lens array are exposed from opposite ends of the first opposing portion and opposite ends of the second opposing portion.

Abstract: In a configuration in which a metal holder is supported by a resin member, the metal holder cannot be grounded, so that electricity may be discharged from the charged holder to a substrate held by the holder. The holder is provided with a pin to determine a position of the holder with respect to a photosensitive member. A conductive member that is made of metal and is grounded, is brought into contact with the pin to thereby enable the holder to be grounded through the pin.

Abstract: A cleaning rod includes a rod-like member, a slidable portion which is provided on a free end side of the rod-like member with respect to a direction in which the cleaning rod is inserted and which is slidable on a light emergent surface of a lens of an image forming apparatus, and a restricting portion configured to restrict movement of the slidable portion in a direction away from the light emergent surface with respect to an optical axis direction by contacting the holder at each of free ends of opposing wall portions of a holder of the image forming apparatus from a side opposite from a side where a photosensitive member of the image forming apparatus is provided with respect to the optical axis direction in a state in which the slidable portion contacts the light emergent surface.

Abstract: A holding member 505 includes a first side wall portion 505a and a second side wall portion 505b, and a part of a surface 803b of a substrate 502 on a side opposite from a mounting surface 803 and a holding member 505 are fixed to each other by an adhesive. In the first side wall portion 505a, an inserting hole 801 opposing a corner portion 502 as of the substrate 502 in a widthwise direction of the substrate 502, and also, in the second side wall portion 505b, an inserting hole 801 opposing a corner portion 502bs of the substrate 502.

Abstract: In an image forming apparatus including an optical print head, a length of a cable from a regulating portion to a connecting portion in a state where the connecting portion is connected to a connector is set to a length that enables the connector to be located on a front side of an opening when the optical print head moves to a pull-out position in the state where the connecting portion is connected to the connector.

Abstract: A light-emitting diode exposure head includes a lens array, a long holder to hold the lens array, and a substrate having light-emitting diodes that emit light to expose a photosensitive member. The lens array includes lenses and condenses the light emitted from the light-emitting diodes on the photosensitive member. The long holder includes a base portion having an opening into which the lens array is inserted, and a pair of extended portions extended in a direction that is opposite of an emitting direction of the light along an optical axis of each of the lenses from both ends of the base portion in a transverse direction of the long holder. The pair of extended portions and the substrate are bonded in a state where leading edges of the pair of extended portions are in contact with a light-emitting surface of the substrate that serves as a surface of the substrate.

Abstract: A cleaning member that is used in an image forming apparatus and that is inserted from outside the image forming apparatus, the apparatus including a holding body that holds a substrate on which light emitting elements that expose a photosensitive drum are aligned and that holds lenses, the cleaning member including a rod-shaped rhabdoid formed of resin, a cleaning portion provided in the rhabdoid to clean a light emission surface of each lens, the cleaning portion moving together with the rhabdoid inserted in the image forming apparatus and opposing the light emission surface in an optical axis direction of the lens, and a magnet provided on the rhabdoid, the magnet emitting magnetic force that generates force drawing the holding body thereto so that the cleaning portion continues to contact the light emission surface.

Abstract: A cleaning rod includes a rod-like member, a slidable portion which is provided on a free end side of the rod-like member with respect to a direction in which the cleaning rod is inserted and which is slidable on a light emergent surface of a lens of an image forming apparatus, and a restricting portion configured to restrict movement of the slidable portion in a direction away from the light emergent surface with respect to an optical axis direction by contacting the holder at each of free ends of opposing wall portions of a holder of the image forming apparatus from a side opposite from a side where a photosensitive member of the image forming apparatus is provided with respect to the optical axis direction in a state in which the slidable portion contacts the light emergent surface.

Abstract: In a configuration in which a metal holder is supported by a resin member, the metal holder cannot be grounded, so that electricity may be discharged from the charged holder to a substrate held by the holder. The holder is provided with a pin to determine a position of the holder with respect to a photosensitive member. A conductive member that is made of metal and is grounded, is brought into contact with the pin to thereby enable the holder to be grounded through the pin.

Abstract: An image forming apparatus includes a drum unit, an optical print head, a moving mechanism, a moving mechanism supporting member, a main assembly, a flexible flat cable, a first cover portion made of a resin material and provided in the supporting member so as to cover a first portion of a cutting plane of the opening, the first portion opposing one surface of the flexible flat cable, and a second cover portion made of a resin material and provided in the supporting member so as to cover a second portion of the cutting plane of the opening, the second portion opposing the other surface of the flexible flat cable.

Abstract: An image forming apparatus includes a third link portion which is rotatably connected to said first link portion at a position between said first connecting portion and said first moving portion so that said first moving portion and said second moving portion are moved toward said drum unit by rotation of said first link portion about said first connecting portion as a rotation shaft and by rotation of said second link portion about said second connecting portion as a rotation shaft in interrelation with slide of said slidable portion, and which is rotatable relative to the apparatus main assembly. The third link portion is out of contact with the optical print head at a portion corresponding to an end portion on the optical print head side.

Abstract: An image forming apparatus includes a cover pivotable on a body to close an opening at a closed position and open the opening at an open position, first and second replacement units having photosensitive drums, an optical print head pivotable in one direction, a spring, and a stopper. The spring applies, to the optical print head, a force for allowing the optical print head to pivot toward the one direction so that a movement of the optical print head with a pivotal movement of the cover from the open position to the closed position is prevented from being inhibited by the first developing cartridge. The optical print head, having the force applied the optical print head by the spring, so that movement of the optical print head with pivotal movement of the cover from the open to the closed position is prevented from being inhibited by the second developing cartridge.

Abstract: An image forming apparatus includes a drum cartridge including a photosensitive drum, a movable optical print head including a light emitting element and a lens array, and a portion-to-be-contacted. The photosensitive drum and a light emergent surface of the lens array are spaced from each other to permit insertion of a cleaning member therebetween from an outside of the main assembly. The portion-to-be-contacted provided in a main assembly and configured to be contacted by the cleaning member to prevent further insertion of said cleaning member after said cleaning member cleans said light emergent surface by sliding on the light emergent surface from one end side toward the other end side of the light emergent surface with respect to a longitudinal direction of said lens array.

Abstract: A cleaning member for use in an image forming apparatus and configured to be inserted into the apparatus, the apparatus comprising a holding body that holds a substrate and lenses, the cleaning member comprising a rod, a cleaning portion provided in the rod to clean a light emission surface of each lens, a magnet attached to the rod, the magnet emitting a magnetic field to generates a magnetic force to draw the holding body thereto so that the cleaning portion maintains contact with the light emission surface, a yoke member attached to the rod and in contact with the magnet. The yoke member is configured to protrude, with respect to the magnet, towards a side on which the holding body is disposed, and a contact portion that is configured to contact the holding body and that to protrude, with respect to the yoke member, towards the above side.

Abstract: A cleaning member that is used in an image forming apparatus and that is inserted from outside the image forming apparatus, the apparatus including a holding body that holds a substrate on which light emitting elements that expose a photosensitive drum are aligned and that holds lenses, the cleaning member including a rod-shaped rhabdoid formed of resin, a cleaning portion provided in the rhabdoid to clean a light emission surface of each lens, the cleaning portion moving together with the rhabdoid inserted in the image forming apparatus and opposing the light emission surface in an optical axis direction of the lens, and a magnet provided on the rhabdoid, the magnet emitting magnetic force that generates force drawing the holding body thereto so that the cleaning portion continues to contact the light emission surface.

Abstract: A cleaning member for use in an image forming apparatus and configured to be inserted into the apparatus, the apparatus comprising a holding body that holds a substrate and lenses, the cleaning member comprising a rod, a cleaning portion provided in the rod to clean a light emission surface of each lens, a magnet attached to the rod, the magnet emitting a magnetic field to generates a magnetic force to draw the holding body thereto so that the cleaning portion maintains contact with the light emission surface, a yoke member attached to the rod and in contact with the magnet. The yoke member is configured to protrude, with respect to the magnet, towards a side on which the holding body is disposed, and a contact portion that is configured to contact the holding body and that to protrude, with respect to the yoke member, towards the above side.

Abstract: Provided are a first seating face and a second seating face, to which a lower side of a holding member of an optical print head being moved from an exposure position toward a retracted position by a movement mechanism strikes in the direction of movement thereof. A light emission face of a lens array of the holding member that has abutted the first seating face and second seating face is thereby positioned on a movement path of a rubbing portion provided on a cleaning member that is inserted from an opening.