POWER TRANSMISSION DEVICE

摘要

A power transmission device includes an electromagnetic wave-shielding wall partitioning a first space and a second space adjacent to the first space and blocking propagation of an electromagnetic wave between the first space and the second space. The power transmission device also includes a first pulley arranged within the first space and a second pulley arranged within the second space. The power transmission device also includes a belt placed on the first pulley and the second pulley and extending through the electromagnetic wave-shielding wall to transmit rotational driving force between the first space and the second space. From the electromagnetic wave-shielding wall a hollow tubular member is protruded and allows the first space and the second space to communicate with each other. The belt extends through the inside of the tubular member.