Abstract: An image forming apparatus includes an apparatus main body; a cover member that is provided rotatable in a rotation direction about a rotation axis with respect to the apparatus main body, having an opening part, a fuser that fuses a toner image formed on each medium of media wherein the fuser is attached to the apparatus main body by being inserted through the opening part and detached from the apparatus main body by being pulled out of the opening part; and a sub cover member that has an surface portion and is attached to the fuser, wherein in a state in which the fuser is attached to the image forming apparatus, the surface portion of the sub cover is arranged within the opening part, the sub cover member moves in the rotation direction in correspondence with the rotation of the cover member.

Abstract: An image forming apparatus includes an apparatus main body; a cover member that is provided rotatable in a rotation direction about a rotation axis with respect to the apparatus main body, having an opening part, a fuser that fuses a toner image formed on each medium of media wherein the fuser is attached to the apparatus main body by being inserted through the opening part and detached from the apparatus main body by being pulled out of the opening part; and a sub cover member that has an surface portion and is attached to the fuser, wherein in a state in which the fuser is attached to the image forming apparatus, the surface portion of the sub cover is arranged within the opening part, the sub cover member moves in the rotation direction in correspondence with the rotation of the cover member.

Abstract: A drive transmission device according to an embodiment may include: a driving shaft configured to be rotated by a driving source; a driven shaft; and a coupling device including a driving side coupling connected to the driving shaft and a driven side coupling connected to the driven shaft, and configured to selectively couple the driving shaft and the driven shaft with each other to transmit a rotation of the driving shaft to the driven shaft. The driving side coupling may include an Oldham's coupling including a driving side rotor, an intermediate rotor, and a driven side rotor and configured to absorb an eccentricity between the driving shaft and the driven shaft, wherein the driving side coupling further comprises a bias member provided inside of the driving side coupling, the bias member biasing the driven side rotor toward the driven side coupling.

Abstract: A drive transmission device according to an embodiment may include: a driving shaft configured to be rotated by a driving source; a driven shaft; and a coupling device including a driving side coupling connected to the driving shaft and a driven side coupling connected to the driven shaft, and configured to selectively couple the driving shaft and the driven shaft with each other to transmit a rotation of the driving shaft to the driven shaft. The driving side coupling may include an Oldham's coupling including a driving side rotor, an intermediate rotor, and a driven side rotor and configured to absorb an eccentricity between the driving shaft and the driven shaft, wherein the driving side coupling further comprises a bias member provided inside of the driving side coupling, the bias member biasing the driven side rotor toward the driven side coupling.

Abstract: Lift of the rotation fulcrum of the armature is prevented. In the print head in which a print wire is furnished at an end portion, and that has an armature that is furnished rotatably, a yoke touches a rotation fulcrum of the armature; an elasticity member of a cantilever structure presses the rotation fulcrum of the armature to the yoke by sandwiching the armature between the yoke and the elasticity member; a housing fixes an end portion of the elasticity member and covers the elasticity member through forming a gap between the elasticity member and the housing; and a pressing member is arranged between the housing and the elasticity member and touches the housing and the elasticity member.

Abstract: Lift of the rotation fulcrum of the armature is prevented. In the print head in which a print wire is furnished at an end portion, and that has an armature that is furnished rotatably, a yoke touches a rotation fulcrum of the armature; an elasticity member of a cantilever structure presses the rotation fulcrum of the armature to the yoke by sandwiching the armature between the yoke and the elasticity member; a housing fixes an end portion of the elasticity member and covers the elasticity member through forming a gap between the elasticity member and the housing; and a pressing member is arranged between the housing and the elasticity member and touches the housing and the elasticity member.