A sheet feeding device includes a tray, a feeding member, a conveying member, a separation member, a transmission unit, and a biasing member. The separation member abuts the conveying member and separates a single sheet from sheets fed by the feeding member. The transmission unit includes first and second portions respectively having first and second transmission surfaces. Where the first and second transmission surfaces abut each other, the first portion drives the second portion that drives the feeding member. The biasing member biases either of the first and second portions so that the first and second transmission surfaces move away from each other. The conveying member is driven in a state where the separation member abuts the conveying member and the feeding member abuts the sheet stacked on the tray and is stopped. Thereafter, the first and second transmission surfaces abut each other, and the feeding member is driven.

A sheet conveying apparatus includes a rotating member to covey a sheet and a drive transmission having a first, gear in a first engaging portion, a second gear in a second engaging portion, and an urging member. In a state where the first engaging portion and the second engaging portion are engaged with each other and the first gear is rotating in a first direction, a first surface of the first engaging portion transmits a driving force of a driving source from the first gear to the second gear. The first surface is inclined so that either engaging portion can retract, in the direction against the urging force of the urging member, to disengage with the other engaging portion while the first engaging portion rotates. A direction of twist of helical teeth in the first gear is configured to generate an axial force with respect to the urging direction.

A sheet accommodating cassette includes a sheet accommodating section, a sheet loading plate, and a lift mechanism. The lift mechanism includes a rotary shaft, a push-up plate, a coupling member, an actuator, and an urging member. The push-up plate lifts up and down the sheet loading plate by pivoting about the rotary shaft. Driving force is input from a cassette attachment section to the coupling member. The actuator projects from an end of the rotary shaft. The urging member urges the actuator in a direction in which the sheet loading plate pivots toward the lowered position.

In an example, a torque key may include a body to mate with a wheel, a plurality of driving lugs extending radially outward from the body, and a plurality of key lugs extending radially into the body. The body may have an inner bore to receive a shaft, each driving lug may engage with a driven lug protruding from an axial face of the wheel, and each key lug may engage with a slot of the shaft.

There is provided an image reading device including a power transmission unit that transmits power of a driving source to a transportation roller and a discharging roller, in which the power transmission unit is configured to include a first gear group that constitutes a first power transmission route and a second gear group that constitutes a second power transmission route and that is configured to include a smaller number of gears than the first gear group, the second gear group includes a transportation roller driving gear and is disposed inside a curved inversion route as seen from an axial direction of a rotation shaft, and at least a portion of the transportation roller driving gear is positioned inside a medium transportation region in a width direction of a medium.

A drive transmission device includes a drive transmission member and a rotation shaft. The drive transmission member has an insertion portion. The rotation shaft includes a press-fit portion and another flat portion. The press-fit portion press-fits into the insertion portion after insertion of an axial tip of the rotation shaft into the insertion portion and includes a press-fit flat portion parallel to an axial direction of the rotation shaft. The other flat portion is at a position closer to the axial tip than the press-fit flat portion. The insertion portion has an inner-wall flat portion to contact the press-fit flat portion when the press-fit portion is press-fitted into the insertion portion. The other flat portion is parallel to the press-fit flat portion that has a distance from an axial center of the rotation shaft smaller than the press-fit flat portion.

A suspended surface assembly is provided having a trainable surface support element, a spindle component configured for training of the trainable surface support element therearound, a take-up action module configured to drivingly rotate the spindle component to thereby effect winding of the trainable surface support element onto the spindle component or to effect unwinding of the trainable surface support element from a partially or fully wound-up condition, and a lift complex for adjusting the vertical position of the trainable surface support element and the spindle component, the lift complex including a motive power element operable to both drivingly rotate the spindle component and to drivingly raise and lower the trainable surface support element and the spindle component. A method for operating the suspended surface assembly is also provided.

A banknote storage unit comprising: a first tape reel banknote storage device; a second tape reel banknote storage device; and a drive transmission means pivotable between engagement with said first tape reel banknote storage device and engagement with said second tape reel banknote storage device.

A sheet accommodating cassette includes a sheet accommodating section, a sheet loading plate, and a lift mechanism. The lift mechanism includes a rotary shaft, a push-up plate, a coupling member, an actuator, and an urging member. The push-up plate lifts up and down the sheet loading plate by pivoting about the rotary shaft. Driving force is input from a cassette attachment section to the coupling member. The actuator projects from an end of the rotary shaft. The urging member urges the actuator in a direction in which the sheet loading plate pivots toward the lowered position.

A first roller is driven, by a conveying motor rotating in a normal direction and in a reverse direction, to rotate in a forward direction and in a backward direction, respectively. The first roller and a second roller convey a sheet in a conveying direction by rotating in the forward direction. The transmission unit transmits a driving force of the conveying motor to the second roller and includes a first rotary member. The transmission unit has such play that when the conveying motor is switched from rotation in a normal direction to rotation in a reverse direction, rotation of the second roller in a backward direction is delayed by a predetermined time period from rotation of the first roller in the backward direction. The predetermined time period is greater than a time period corresponding to one tooth of the first rotary member.