Patent ID: 8576533

Claim:
A power supply device comprising: a discharge gap device which discharges a lightning surge or static electricity, said discharge gap device comprising: a first wiring pattern including a discharge area; and a discharge pattern connected to a second wiring pattern electrically connected to an internal circuit side and projecting from the second wiring pattern, the discharge pattern confronting a portion of the first wiring pattern corresponding to the discharge area, and the discharge pattern being electrically insulated from the first wiring pattern, wherein a gap is formed between the portion of the first wiring pattern corresponding to the discharge area and the discharge pattern to have a predetermined interval therebetween and used to discharge a lighting surge or static electricity, wherein the portion of the first wiring pattern corresponding to the discharge area includes a side face which confronts the discharge pattern, the discharge pattern includes a discharge side face which confronts the side face of the portion of the first wiring pattern, and the discharge side face of the discharge pattern and the side face of the first wiring pattern are arranged to be parallel to each other, wherein the discharge pattern is in a rectangular form with angular edges, and wherein a width of the side face of the first wiring pattern is larger than a width of the discharge side face of the discharge pattern, wherein the discharge area is integrated into the first wiring pattern so as not to project from the side face of the first wiring pattern; and wherein the power supply device further comprises: a power supply electrically connected to the first wiring pattern of the discharge gap device; an internal circuit electrically connected to the second wiring pattern of the discharge gap device; and a line filter electrically connected to the discharge area and the discharge pattern of the discharge gap device.