Abstract: A packaging structure disclosed herein includes a box in which a component is accommodated and a lower layer tray and a middle layer tray formed of a cardboard sheet. The lower layer tray is provided inside the box. The middle layer tray is provided above the lower layer tray inside the box. The lower layer tray includes a lower layer opening into which the component is inserted and fixed, and a lower layer first tab provided at an edge of the lower layer opening and folded downward. The middle layer tray includes a middle layer opening into which the component is inserted and fixed, and a middle layer first tab provided at an edge of the middle layer opening, folded downward, and engaged with the lower layer opening in a state of overlapping the lower layer first tab.

Abstract: A gearbox includes: a gearbox main body made of resin that constitutes a part of a speed reducer to which a motor is mounted; and a terminal that conducts power supplied from an external source to the motor. The gearbox main body includes a through hole formed to correspond to a mold that is used to maintain a position of the terminal while the terminal is being integrated with the gearbox main body by insert molding. The through hole may function as a vent hole in the gearbox main body.

Abstract: A gearbox includes: a gearbox main body made of resin that constitutes a part of a speed reducer to which a motor is mounted; and a terminal that conducts power supplied from an external source to the motor. The gearbox main body includes a through hole formed to correspond to a mold that is used to maintain a position of the terminal while the terminal is being integrated with the gearbox main body by insert molding. The through hole may function as a vent hole in the gearbox main body.