Patent attributes
A case structure of a power equipment unit which contains power equipment mounted in a vehicle includes: a case body which contains the power equipment and an upper portion of which is open; a lid member which covers the upper portion of the case body; and a cover member which is attached to the lid member and which covers at least an opening part formed in the lid member, wherein: an intake port for taking in air from outside is formed in the cover member; a space part is formed between the cover member and the lid member; the opening part of the lid member is surrounded by a circumferential wall having a cylindrical shape; and a drain passage communicating with a drain port is connected with an outer circumference of the circumferential wall.