Patent ID: 9080755
Filing Date: 2015-07-14
Classification: F21K,F21V,F21Y

Abstract:
1. A lighting device in which a light source portion is provided at a tip portion of a case having a metal heat dissipation portion, wherein the heat dissipation portion is obtained by press-working a metal plate into a shape having a vertically extending peak portion and a vertically extending valley portion that are peripherally and consecutively formed, and the heat dissipation portion is obtained by press-deforming the metal plate into a substantially dome-like shape having the vertically extending peak portion and the vertically extending valley portion that are peripherally and consecutively formed, by repeatedly bending the metal plate into a wave shape along a circumferential direction and concurrently warping the metal plate in an axial direction such that an outer peripheral side of the metal plate is positioned closer to a tip in the axial direction than a central side of the metal plate.