ELECTRONIC APPARATUS

To provide a technology that improves heat dissipation.SOLUTION: A small fast charger 100 includes a circuit board 130 on which multiple types of electronic components are mounted, a metal case 120 that houses the circuit board 130 inside, a resin case 110 that houses the metal case 120 inside with a gap with the surface of the metal case 120, an electric fan 118 and vents 112b and 114b that force air to flow in and out between the outside atmosphere and the inside of the resin case 110. The air that is forcibly taken in and out is guided into the gap to ventilate in the longitudinal direction, and ribs 110p, 110t, 110w that causes at least either an air volume distribution or a wind speed distribution according to the tendency of a temperature distribution on the surface of the metal case 120 to occur in the ventilation cross-sectional direction in the gap.SELECTED DRAWING: Figure 1 【課題】放熱性を向上する技術を提供する。【解決手段】小型急速充電器１００は、複数種類の電子部品が実行された回路基板１３０と、回路基板１３０を内部に収容する金属ケース１２０と、金属ケース１２０の表面との間に隙間を空けて内部に金属ケース１２０を収容する樹脂ケース１１０と、樹脂ケース１１０の外部雰囲気と内部との間で空気を強制的に出入させる電動ファン１１８及び通気口１１２ｂ，１１４ｂと、強制的に出入される空気を隙間内に導いて長手方向に通風させるとともに、金属ケース１２０の表面における温度分布の傾向に応じた風量分布又は風速分布の少なくとも一方を隙間内での通風断面方向で生じさせるリブ１１０ｐ，１１０ｔ，１１０ｗとを備える。【選択図】図１