| 摘要 |
A structure that ensures air tightness and waterproof performance of a cord insertion hole in a back cover of a lamp body. The arrangement allows a reduction of man hours for fixing a power supply cord to the back cover. In an implementation, a cylindrical outer wall 702 is provided that surrounds cord insertion holes 704a, 704b through which power supply cords 6a, 6b are inserted for sending current to light source bulbs 1a, 1b. A resin mold portion filled inside the outer wall fixes and integrates the power supply cords 6a, 6b in the cord insertion holes 704a, 704b. The resin mold portion includes a lower mold layer 9a on the side of the cord insertion holes 704a, 704b that adheres well to the back cover 7, and an upper mold layer 9b laminated over the lower mold layer 9a and having good heat resistance properties. The upper mold layer 9b prevents creep in the lower mold layer 9a, and the lower mold layer maintains air tightness and waterproof performance at the cord insertion hole.
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