| 摘要 |
A light source device provided with: a discharge lamp that includes a luminous tube and a fixing cap which is positioned at a base-end part of the luminous tube and electrically connected to a negative electrode; a lamp unit that houses the discharge lamp such that replacement thereof is possible due to the lamp unit attachably and detachably supporting the fixing cap; and a box-shaped casing that houses the lamp unit. The fixing cap includes a first body part, which houses the base-end part, and a flange which is formed on the outer peripheral surface of the first body part. The lamp unit includes a clamping part that, when the fixing cap is inserted therein and rotated, clamps the flange if the rotation is in a first rotation direction, and unclamps the flange if the rotation is in a second rotation direction, which is the direction opposite to the first rotation direction. A side surface of the casing includes an opening and closing door that rotates around a rotation shaft provided in the vicinity of a front surface, and when the opening and closing door is rotated to the outside, the lamp unit is pulled out and the clamping part is exposed. |
