| 摘要 |
PROBLEM TO BE SOLVED: To prevent falling-down of a plug into a lamp housing. SOLUTION: A plug 24 fixed to the tip of a wiring cord 23 is drawn outside from a through hole 28a of a lamp housing 28. A socket 21 is fitted to the plug 24. In this state, the socket 21 is inserted into the through hole 28a formed at the lamp housing 28. The plug 24 is provided with foldable plate springs 51, for preventing any falling-down, which can be enlarged in the state in which the plug 24 is drawn outside from the through hole 28a so as to prevent any falling-down of the plug 24 into the lamp housing 28 from the through hole 28a and are folded inside the socket 21 by fitting the socket 21, thereby restricting bending by a projection 53 in such a manner that the plate springs cannot be bent in a direction opposite to the folding direction.
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