Electrical device

摘要

An electrical device has a housing that includes a main body and a lid both of which are electrically conductive. The lid is fastened to a top surface of a sidewall of the main body so as to cover the main body. On at least one of a bottom surface of the lid and the top surface of the sidewall of the main body, there are formed a plurality of protrusions at predetermined positions; each of the protrusions abuts against that one of the bottom surface of the lid and the top surface of the sidewall which is opposed to the protrusion. Except at those predetermined positions where the protrusions are formed, there is provided, between the bottom surface of the lid and the top surface of the sidewall of the main body, a gap via which the internal and external spaces of the housing communicate with each other.

主权项

1. An electrical device comprising:
at least one electrical component; a housing that receives the at least one electrical component therein, the housing including a main body and a lid both of which are electrically conductive, the main body having a bottom wall and a sidewall that is formed along a circumferential periphery of the bottom wall so as to stand upward from the bottom wall, the lid being fastened to a top surface of the sidewall of the main body so as to cover the main body; and means for fastening the lid to the top surface of the sidewall of the main body of the housing, wherein on at least one of a bottom surface of the lid and the top surface of the sidewall of the main body of the housing, there are formed a plurality of protrusions at predetermined positions, each of the protrusions abutting against that one of the bottom surface of the lid and the top surface of the sidewall which is opposed to the protrusion, and except at those predetermined positions where the protrusions are formed, there is formed a gap between the bottom surface of the lid and the top surface of the sidewall of the main body, thereby allowing internal and external spaces of the housing which are separated by the sidewall of the main body to communicate with each other via the gap, wherein a direction of contact between the main body and the lid at the protrusions coincides with a direction of fastening the lid to the main body, wherein the means for fastening contacts the top surface of the sidewall of the main body of the housing.