| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an attachment structure which enables a fluorescent unit to be attached to a pedestal in a state where the fluorescent unit and a condensing element are made closer to each other, and suppresses contact between the fluorescent unit and the condensing element.SOLUTION: An attachment structure 29 includes a pedestal 5, a fluorescent unit 3, and a guide member 30. The guide member 30 can position the fluorescent unit 3 to a first position of the pedestal 5, and to a second position and a third position of the pedestal 5, in which the fluorescent unit 3 is made closer to a condensing element 4 than the first position. The guide member 30 includes a first guide part 30a, a second guide part 30b, and a third guide part 30c. The first guide part 30a guides the fluorescent unit 3 to the first position and the second position. The second guide part 30b restricts the approach of the fluorescent unit 3 guided to the second and third positions to the condensing element 4. The third guide part 30c restricts separation of the fluorescent unit 3 guided to the third position from the condensing element 4.</p> |
