| 摘要 |
PURPOSE: To prevent infiltration of water into a lamp chamber by integrally forming a cover part in an outer peripheral wall part among two peripheral wall parts protrusively arranged on a lamp body, and constituting a ventilating passage of a double structure composed of two spaces formed between the cover part and the peripheral wall parts. CONSTITUTION: An eaves wall 14 positioned on the upper and left and right sides of a communicating hole 12 to communicate a lamp chamber 5 with an external part, is arranged on a lamp body 2. An outer peripheral wall 16 is arranged around the eaves wall 14, and a cover part 19 to cover the protrusive end side of the eaves wall 14 is integrally formed on this. The cover part 19 is brought into contact with the protrusive end of the eaves wall 14, and a first space 24a is formed between the lamp body 2, the cover part 19 and the eaves wall 14, and the space is communicated with the lamp chamber 5 through the communicating hole 12. The cover part 19 is brought into contact with an inside surface of an outer peripheral wall 16, and a second space 24b is formed between the lamp body 2, the cover part 19, the eaves wall 14 and the outer peripheral wall 16. The first space 24a and the second space 24b are communicated with each other through a passage 15p of the eaves wall 14, and the second space 24b and an external part are communicated with each other through a notch 17 of the outer peripheral wall 16. |
