Abstract: A pattern drawing device is provided with: a first cylindrical lens on which a beam from a light source device is incident and which has an anisotropic refractive power for converging, in a sub-scanning direction orthogonal to a main scanning direction, the beam traveling toward a reflection surface of a polygon mirror; an f? lens system for causing the beam having been deflected by the reflection surface of the polygon mirror to be incident thereon, and for condensing the beam as a spot light on a surface of an object to be irradiated; and a second cylindrical lens having an anisotropic refractive power for converging, in the sub-scanning direction, the beam traveling toward the surface after being emitted from the f? lens system.

Abstract: A pattern drawing device is provided with: a first cylindrical lens on which a beam from a light source device is incident and which has an anisotropic refractive power for converging, in a sub-scanning direction orthogonal to a main scanning direction, the beam traveling toward a reflection surface of a polygon mirror; an f? lens system for causing the beam having been deflected by the reflection surface of the polygon mirror to be incident thereon, and for condensing the beam as a spot light on a surface of an object to be irradiated; and a second cylindrical lens having an anisotropic refractive power for converging, in the sub-scanning direction, the beam traveling toward the surface after being emitted from the f? lens system.

Abstract: Disclosed is a stator capable of reducing stress generated in the resin mold of the stator. A stator is provided with a coil formed by coiling a flat conductor, a split stator core provided with a teeth unit for inserting the coil, and a resin mold, which has resin covering the coil ends of the coil inserted into the split stator core. In the stator, an insulator is formed between the split stator core and the coil by way of insert molding, and the resin mold has a cavity, formed in the radial direction of the stator, in between the coil and the end face of the split stator core.

Abstract: Disclosed is a stator capable of reducing stress generated in the resin mold of the stator. A stator is provided with a coil formed by coiling a flat conductor, a split stator core provided with a teeth unit for inserting the coil, and a resin mold, which has resin covering the coil ends of the coil inserted into the split stator core. In the stator, an insulator is formed between the split stator core and the coil by way of insert molding, and the resin mold has a cavity, formed in the radial direction of the stator, in between the coil and the end face of the split stator core.

Abstract: An actuation system includes a pump assembly configured to form a pump chamber, an actuator having first and second chambers and a movable member and configured to convert pressures applied to the first and second chambers into a movement of the movable member, and a valve section. The valve section has a plurality of positions set by a controller, and the plurality of positions includes a first position in which the valve section opens the first flow path and closes the second flow path, a second position in which the valve section closes the first flow path and opens the second flow path, and a neutral position in which the valve section closes the first and second flow paths.

Abstract: A tail boom capable of creating propulsive force during forward flight to increase the forward speed is provided. A tail boom producing a force that cancels out a torque effect due to the Coanda effect by forcing airflow generated by a propeller disposed on an upstream side downward through a slit penetrating in the thickness direction and provided at a lower part of one side surface is configured such that the airflow generated by the propeller contributes to the propulsive force during forward flight.

Abstract: A planetary gear system contains: a sun gear as an input; a fixed ring gear; a planetary career as an output, a first planetary gear supported by the planetary career and engaging the sun gear; and a second planetary gear supported by the planetary career and engaging the ring gear. A first spin axis of the first planetary gear is arranged closer to a planetary career rotation axis of the planetary career than a second spin axis of the second planetary gear. Torque is transmitted from the first planetary gear to the second planetary gear.

Abstract: A planetary gear system contains: a sun gear as an input; a fixed ring gear; a planetary career as an output; and a planetary gear unit supported by the planetary career. The planetary gear unit includes: a shaft; a first planetary gear coupled to the shaft and engaging the sun gear; and a second planetary gear coupled to the shaft and engaging the ring gear. The planetary gear unit rotates around a first rotation axis with respect to the planetary career. The planetary career rotates around a second rotation axis. The first rotation axis intersects the second rotation axis.

Abstract: A helicopter capable of preventing an increase in size of an airframe and achieving high-speed flight is provided. Provided is an airframe for supporting a main rotor so as to be rotatable, a propeller having a plane of rotation intersecting a plane of rotation of the main rotor, a propeller supporting portion that supports the propeller so as to be movable between positions behind and at the side of the airframe, and a tail disposed on the airframe, having a surface intersecting the plane of rotation of the main rotor.

Abstract: An actuation system includes a pump assembly configured to form a pump chamber; an actuator having first and second chambers and a movable member and configured to convert pressures applied to the first and second chambers into a movement of the movable member; and a valve section. A controller controls the valve section to open a first flow path between the pump chamber and the first chamber and close a second flow path between the pump chamber with the second chamber, during a discharge period during which the pump chamber is pressurized, in a first mode; to close the first flow path and open the second flow path during an intake period during which the pump chamber is depressurized, in the first mode; to close the first flow path and open the second flow path during the discharge period in a second mode; and to open the first flow path and close the second flow path during the intake period in the second mode.