The disclosure relates to a pressure generation unit for a braking system. The pressure generation unit comprises an electric drive motor and a hydraulic piston which is displaceable by the electric drive motor in order to selectively apply pressure to or relieve pressure from a pressure fluid circuit delimited by the hydraulic piston. For this purpose, the electric drive motor is drivingly coupled to the hydraulic piston via a planetary gear mechanism and a rack-and-pinion gear mechanism.

A sheet conveying apparatus includes a conveying member conveying and rotating a sheet, a moving member configured to be movable between a first guiding position and a second guiding position, a first abutting portion configured to stop the moving member at the first guiding position, a second abutting portion configured to stop the moving member at the second guiding position, and a planetary gear mechanism. The planetary gear mechanism includes a first rotating element configured to rotate in a first direction and a second direction which is opposite to the first direction, a second rotating element configured to rotate the conveying member by drivenly rotating with the first rotating element, and a third rotating element configured to move the moving member from the second guiding position to the first guiding position by drivenly rotating with the first rotating element rotating in the first direction, and move the moving member from the first guiding position to the second guiding position by drivenly rotating with the first rotating element rotating in the second direction.

A lens drive unit includes: a driven member that moves a lens in an optical axis direction; a first gear rotated by a drive force of a drive motor; a second gear rotated by a drive force of a manual operation section; a third gear that engages with the first gear and the second gear and is rotated when the first gear is rotated but the second gear is not rotated whereas rotated when the second gear is rotated but the first gear is not rotated; and a fourth gear rotated when the third gear is rotated to transmit the drive force of the drive motor or the drive force of the manual operation section to the driven member, wherein the reduction ratio of the fourth gear to the first gear is set to be greater than the reduction ratio of the fourth gear to the second gear.