Waterproof casing

Abstract

A waterproof casing including a casing body which has a substantial box-shape and a lid which openably closes an open portion of the casing body. The casing body end the lid include respective first peripheral walls butted against each other to thereby prevent the intrusion of water into a receiving space for electrical parts, and also include respective second peripheral walls which are spaced outwardly from the first peripheral walls to form a space around the first peripheral walls, and are butted against each other, so that each of the joint portion between the first peripheral walls and the joint portion between the second peripheral walls forms a waterproof structure which limits the intrusion of water. The two joint portions are offset from each other in a vertical direction, and drain holes are formed through a bottom portion of the second peripheral wall of the casing body so as to reduce the pressure of a high-pressure water stream within the space and also to discharge the water from the space.

Dependencies are inferred from the claim text.