Abstract:
A sheet feeding cassette is capable of being mounted to and removed from an apparatus body along a specified mounting direction. The sheet accommodated within a sheet accommodating portion is conveyed through a sheet conveyance path in a sheet conveyance direction extending along the mounting direction. A sheet feeding roller is disposed at an inlet side of the sheet conveyance path so as to face the sheet accommodating portion. A retard roller is disposed so as to face the sheet feeding roller. The sheet feeding roller forms a sheet feeding nip between the sheet feeding roller and the retard roller. A lock mechanism locks drawing-out of the sheet feeding cassette from the apparatus body or releases the lock. A separator moves the retard roller away from the sheet feeding roller prior to or simultaneously with the lock being released by the lock mechanism.
Abstract:
A switch mechanism of the present disclosure includes a first member, a second member, a switch, a pressing-down member and an operation member. The second member can be moved with respect to the first member. The switch is provided in the first member. The pressing-down member is provided in the first member so as to press down the switch, and in the pressing-down member, a regulation portion that restricts the amount of pressing of the switch is formed. The operation member is provided in the second member such that the operation member can be operated by a user and is pressed down by the user so as to press the pressing-down member.
Abstract:
A sheet feeder includes a sheet accommodating section, a sheet loading plate, an operating plate, a sector gear, and a pressing member. The sheet loading plate is turnably supported on a bottom surface of the sheet accommodating section. The operating plate lifts up and down the sheet loading plate. The sector gear transmits drive power from a main body of an image forming apparatus to the operating plate. The pressing member is located at a first location when the sheet loading plate is positioned at the lying down position, and moves to a second location by rotation of the sector gear by a predetermined amount. The first location is a location where the pressing member comes in contact from above with the sheet loading plate at the lying down position, and the second location is a location where the pressing member retreats from the sheet loading plate.
Abstract:
An image forming apparatus includes an apparatus main body, a drum unit, and a developing unit. The developing unit includes a developing unit projection projecting out from opposite sides of the developing unit along an extension line of a rotation shaft of a developing roller. The apparatus main body includes a first developing projection guide portion configured to guide the developing unit projection from a first start position to a relay position in the apparatus main body, the relay position located closer to the photoconductor drum than the first start position. The drum unit includes a second developing projection guide portion configured to, succeeding from the first developing projection guide portion, guide the developing unit projection from the relay position to a first end position, the first end position located closer to the photoconductor drum than the relay position.
Abstract:
An image forming apparatus includes an apparatus main body, a drum unit, and a developing unit. The developing unit includes a developing unit projection projecting out from opposite sides of the developing unit along an extension line of a rotation shaft of a developing roller. The apparatus main body includes a first developing projection guide portion configured to guide the developing unit projection from a first start position to a relay position in the apparatus main body, the relay position located closer to the photoconductor drum than the first start position. The drum unit includes a second developing projection guide portion configured to, succeeding from the first developing projection guide portion, guide the developing unit projection from the relay position to a first end position, the first end position located closer to the photoconductor drum than the relay position.
Abstract:
A roller drive transmission device includes a drive input gear, a drive transmission gear, a roller unit and a ratchet mechanism. When a rotational drive force is input to the drive input gear and the drive transmission gear is slid to a first position, the drive input gear, the drive transmission gear and the roller unit are integrally rotated in a first rotational direction. When the input of the rotational drive force to the drive input gear is cut off and the roller unit is rotated, following a sheet, the drive transmission gear is slid to a second position and the roller unit and the drive transmission gear are decoupled. The ratchet mechanism includes a load adjustment mechanism configured to make a rotational load in the first rotational direction of the drive transmission gear arranged at the second position larger than a movement load in an axial direction.
Abstract:
A roller drive transmission device includes a drive input gear, a drive transmission gear, a roller unit and a ratchet mechanism. When a rotational drive force is input to the drive input gear and the drive transmission gear is slid to a first position, the drive input gear, the drive transmission gear and the roller unit are integrally rotated in a first rotational direction. When the input of the rotational drive force to the drive input gear is cut off and the roller unit is rotated, following a sheet, the drive transmission gear is slid to a second position and the roller unit and the drive transmission gear are decoupled. The ratchet mechanism includes a load adjustment mechanism configured to make a rotational load in the first rotational direction of the drive transmission gear arranged at the second position larger than a movement load in an axial direction.
Abstract:
An image forming apparatus includes a body, a paper feed cassette, a rotary operating member, an engaging portion, engaged portions, and a size detection switch. The rotational operating member is rotatable. The engaging portion engages the rotary operating member with the paper feed cassette. Any one of the engaged portions is engaged by the engaging portion. The size detection switch is used to detect the size of a recording medium stored in the paper feed cassette. The rotational operating member includes a pressure portion that activates the size detection switch. The rotational force in the first direction necessary for causing the engagement to be released is greater than the rotational force in the second direction necessary for causing the engagement to be released.
Abstract:
An image forming apparatus includes an apparatus main body, a sheet feeding cassette, an image forming section, a delivery member, a conveying member, a lift plate, a driving section, a first switching section, a second switching section, and a driving control section. The conveying member is disposed in the reverse conveying path. The lift plate is enabled to change a position thereof between a sheet feeding position and a retracting position. The first switching section transmits the driving force to the delivery member and the conveying member. The second switching section transmits the driving force to the lift plate. The driving control section controls the first switching section, with the lift plate being placed in the sheet feeding position, to rotate the delivery member, and when the sheet is conveyed through the reverse conveying path, moves the lift plate from the sheet feeding position to the retracting position.