| 摘要 |
PROBLEM TO BE SOLVED: To provide a bulb type lighting device having a structure of high heat dissipation.SOLUTION: A cover member covering a light emitting body has a funnel-like vent hole, a heat sink has a cylindrical part passing through a center part of the light emitting body, has an air flow passage communicating with the funnel-like vent hole of the cover member, another end of the cylindrical part is connected to an air flow passage arranged between the heat sink and a storing case, forms a radial flow passage crossing at a right angle with the flow passage in the cylindrical part, an end part of the radial flow passage is connected to an air flow passage arranged between a side surface of a storing case and an inner wall surface of a dissipator and crossing at a right angle with the radial flow passage and the air flow passage is communicated to cause the another end to become a vent hole arranged near a base. |
