| 摘要 |
PROBLEM TO BE SOLVED: To prevent adverse effect on power source wires by socket heating, downsize an apparatus, lessen the number of components and the man-hour of assembly, and lower cost. SOLUTION: A fitting portion 11 which is fitted to a luminaire body and a lamp holder portion 12 are respectively formed at one end of an approximately cylindrical socket body 10 and at the other end thereof. The fitting portion 11 side of the socket body 10 is a large diameter portion 13, and the lamp holder portion 12 side is a small diameter portion 14. On the periphery of the small diameter portion 14 plural protrusions 18a, 18b to 21a, 21b are provided so as not to stick out of the large diameter portion 13 and so as to be arranged in the peripheral direction of the socket body 10. The respective protrusions 18a, 18b to 21a, 21b are composed of the plural sets of one pair of protrusions 18 to 21 arranged in the axis direction of the socket body 10, and at least one set is arranged so as to be shifted in the axis direction. |
