Patent ID: 7111945

Claim:
A projector comprising: a lamp case made of resin in which a light source lamp is fitted; and an optical part holder made of metal in which an optical part is fitted; wherein the lamp case includes a positioning boss, the optical part holder includes: a lamp case holder made of resin which accommodates the lamp case; a tubular light tunnel which shapes a form of light emitted from the light source lamp; a cylindrically shaped portion having a guide hole into which the positioning boss is inserted; and a detent member being resiliently deformable, a light-tunnel fixing member made of metal is attached to the optical part holder, the light-tunnel fixing member fixing the light tunnel to the optical part holder, the detent member is substantially U-shaped and is provided integrally on the light-tunnel fixing member so as to be disposed at a position corresponding to the cylindrically shaped member, the cylindrically shaped portion has a slot portion into which the detent member is inserted and which extends from an outer peripheral surface of the cylindrically shaped portion to the guide hole, and the positioning boss has a concave engaging portion which is engaged with the detent member when the positioning boss is inserted in the guide hole.