Abstract: The present disclosure provides a semiconductor element, which is a switching element. The switching element includes an element front surface on which a gate pad, a plurality of drain pads, and a plurality of source pads are disposed. A source area which is the total area of the plurality of source pads, is larger than a drain area, which is the total area of the plurality of drain pads.

Abstract: A stator includes: a plurality of stator blocks; a plurality of coils; and a supporter supporting the plurality of stator blocks. Each of the plurality of stator blocks includes: a yoke portion located at its outermost perimeter; and a teeth portion protruding from an inner peripheral surface of the yoke portion. The yoke portion has a width dimension along the circumferential direction, and the width dimension of the yoke portion is greater than a width dimension of the teeth portion along the circumferential direction. The supporter is closed in the circumferential direction. The supporter holds the plurality of stator blocks such that the plurality of stator blocks are housed in an interior of the supporter. The supporter has an inner peripheral surface in contact with at least an outer peripheral surface of the yoke portion of each of the plurality of stator blocks.

Abstract: A stator includes a plurality of stator blocks aligned in a circumferential direction and a plurality of coils each made of a winding wound around a corresponding one of the plurality of stator blocks. The stator includes a plurality of insulation members electrically insulating from the plurality of stator blocks from the plurality of coils for respective groups of the plurality of stator blocks and the plurality of coils. Each of the plurality of stator blocks includes a yoke portion located at its outermost perimeter and a teeth portion protruding from an inner peripheral surface of the yoke portion. Each of the plurality of insulation members includes a pair of insulating plates arranged to face each other across the teeth portion. Each of the pair of insulating plates has a width greater than a width of the teeth portion.

Abstract: A stator includes a plurality of stator blocks aligned in a circumferential direction and a plurality of coils each made of a winding wound around a corresponding one of the plurality of stator blocks. The stator includes a plurality of insulation members electrically insulating from the plurality of stator blocks from the plurality of coils for respective groups of the plurality of stator blocks and the plurality of coils. Each of the plurality of stator blocks includes a yoke portion located at its outermost perimeter, a teeth portion protruding from an inner peripheral surface of the yoke portion, and an insulating portion being electrically insulating and covering a surface of the teeth portion. Each of the plurality of insulation members includes a pair of insulating plates. Each of the pair of insulating plates has a width greater than a width of the teeth portion, and the pair of insulating plates are arranged to face each other across the teeth portion.

Abstract: An electric tool includes a motor. The motor includes a stator and a rotor. The rotor rotates with respect to the stator. At least one of the stator or the rotor includes a core (stator core or rotor core) that includes an oriented steel sheet.

Abstract: A semiconductor device includes an electron transit layer formed on first principal surface of the semiconductor layer, an electron supply layer formed on the electron transit layer, a gate conductive layer formed on the electron supply layer, a source conductive layer and a drain conductive layer that are formed on the electron supply layer such that the gate conductive layer is interposed between the source conductive layer and the drain conductive layer, an anode conductive layer that is formed on second principal surface of the semiconductor layer and that is electrically connected to the source conductive layer, a cathode conductive layer that is formed on the first principal surface of the semiconductor layer and that is electrically connected to the drain conductive layer, and a rectifying element formed by a part of the semiconductor layer such that the rectifying element is electrically connected to the anode and cathode conductive layers.

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: An image forming apparatus that includes a cover. By rotation of the cover from a closed position toward an open position, a pressing portion urges a portion-to-be-urged, and a slidable portion is slid (moved) from one end side toward the other end side with respect to a rotational axis direction of a photosensitive drum by the urging, so that an optical print head moves from an exposure position toward a retracted position.

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 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: In an image forming apparatus, a cover 558 rotates from an open position to a closed position, so that an urging portion 561 urges a first portion-to-be-urged 566, and a slidable portion 525 moves from a rear side toward a front side. By this, an optical print head 105 moves from a retracted position toward an exposure position. Thereafter, when the cover 558 further rotates, the urging portion 561 moves from the first portion-to-be-urged 566 onto a second portion-to-be-urged 567 and moves on the second portion-to-be-urged 567. By this, the slidable portion 525 and link portions 651-654 are kept in a rest state without being moved with rotation of the cover 558.

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: In the image forming apparatus, by rotation of a cover 558 from a closed position toward an open position, a pressing portion 561 urges a fourth portion-to-be-urged 568 (portion-to-be-urged), and a slidable portion 525 is slid (moved) from one end side toward the other end side with respect to a rotational axis direction of a photosensitive drum 103 by the urging, so that an optical print head 105 moves from an exposure position toward a retracted position.

Abstract: In an image forming apparatus, a cover 558 rotates from an open position to a closed position, so that an urging portion 561 urges a first portion-to-be-urged 566, and a slidable portion 525 moves from a rear side toward a front side. By this, an optical print head 105 moves from a retracted position toward an exposure position. Thereafter, when the cover 558 further rotates, the urging portion 561 moves from the first portion-to-be-urged 566 onto a second portion-to-be-urged 567 and moves on the second portion-to-be-urged 567. By this, the slidable portion 525 and link portions 651-654 are kept in a rest state without being moved with rotation of the cover 558.

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: An image forming apparatus includes a main assembly, a photosensitive drum, an optical print head, a receiving portion, a portion-to-be-engaged, and a guiding portion. The guiding portion is provided between the portion-to-be-engaged and the receiving portion with an interval from both the portion-to-be-engaged and the receiving portion. The guiding portion guides movement of a cleaning member in a direction from the receiving portion toward the portion-to-be-engaged while limiting movement of the cleaning member in a direction different from the longitudinal direction of the cleaning member to engage the engaging portion with the portion-to-be-engaged.

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 outside of the main assembly. The portion-to-be-contacted is provided in the main assembly and configured to be contacted by the cleaning member to prevent further insertion of the cleaning member after the cleaning member cleans the 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 the lens array.

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: An image forming apparatus includes an optical print head, an optical print head moving mechanism, an abutting portion, a projected portion, an opposing portion, and a preventing portion provided on the projected portion so that in a state in which a drum cartridge is dismounted from a main assembly of the image forming apparatus, the preventing portion is contacted to the opposing portion by movement of the optical print head moved by the moving mechanism toward a side downstream of the exposure position with respect to the movement direction and prevents further movement of the optical print head in the movement direction and so that in a state in which the drum cartridge is mounted in the main assembly and the abutting portion contacts the drum cartridge, the preventing portion is in non-contact with the opposing portion.