| 摘要 |
PURPOSE:To house a lighting circuit indispensable to lighting of a discharge bulb in a lighting circuit housing chamber in the rear of a lamp body without increasing the weight by making water resistance and vibration resistance excellent. CONSTITUTION:In an automobile head lamp using a discharge bulb as a light source, a lighting circuit housing chamber S is formed in the rear of a lamp body 10, and here, on a discharge bulb lighting circuit 51, resinous molding is carried out by means of resin mixed with glass hollow bodies. A resinous molding layer M2 into which the glass hollow bodies are not mixed and which has a high water or moisture infiltration preventive effect, is formed on this glass hollow body mixed resinous molding unit M1, so that water resistance of the lighting circuit can be secured. |
