| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wiring duct capable of improving reception sensitivity of a wireless signal transmitted from an external remote control without impairing the appearance and restriction of installation of a lighting apparatus. <P>SOLUTION: The wiring duct is provided with a pair of long power supply member 1, a duct main body 2 to house the power supply member 1, a support part 3 of which upper face is installed on a ceiling 7 and the lower face supports the duct main body 2, and a light receiving element 40 which is housed in the support part 3 and receives a wireless signal transmitted from an external remote control. The bottom wall part 30 at the lower side of the support part 3 is curved downward so as to make the nearly center in right and left direction as an apex, and a light receiving window 62 to make the light receiving element 40 face outside and an opening window 63 having a larger diameter than the light receiving window 62 are provided at the cover 32 installed at the right side front end of the bottom wall part 30. A first slant part 60 and a second slant part 61 of cone-shape which connect the periphery of the light receiving window 62 and the periphery of the opening window 63 are formed in one body with the bottom wall part 30. <P>COPYRIGHT: (C)2008,JPO&INPIT |
