Abstract: A foldable display device can include a first support plate and a second support plate, a display panel disposed on the first support plate and the second support plate, and a hinge assembly disposed between the first support plate and the second support plate. The hinge assembly can include a first hinge arm and a second hinge arm rotatably connected to each other, a first bevel gear and a second bevel gear respectively coupled to the first hinge arm and the second hinge arm, and a first gear arm and a second gear arm fastened to interlock with the first hinge arm and the second hinge arm. The display panel can be folded or unfolded about a rotation axis different from central axes of the first bevel gear and the second bevel gear.

Abstract: An electric bicycle includes a motor that includes a stator and a rotor and that is driven by a battery, a reduction gear, an output shaft configured to output power of the motor, a sprocket fixed to the output shaft, a housing, and a water jacket configured to cool the motor. The water jacket includes a flange section protruding outward in a radial direction of the stator, the flange section being formed in the water jacket at a side opposite to the reduction gear in a vehicle width direction.

Abstract: An electric bicycle includes a battery, a high voltage electric wire extending from the battery, a motor driven by electricity supplied from the battery, and a reduction gear configured to reduce a speed of output of the motor. The battery is disposed in front of and above the motor. The reduction gear is disposed outside the motor in a vehicle width direction. The high voltage electric wire is disposed in a gap between the reduction gear and the battery in a forward/rearward direction at outer side of the motor in the vehicle width direction.