A projection lens apparatus of a projector and a method of assembling same
has a main lens barrel provided with a first projection lens that expands
and projects an image that is incident thereto, and a reflection group
that reflects the incident image towards the first projection lens group,
a rear lens barrel provided with a second reflection group that projects
the incident image towards the reflection group, the rear lens barrel
being connected to the main lens barrel to move forward and backward to
adjust an optical axis of the image as projected, and a pressing mechanism
elastically pressing the rear lens barrel with respect to the main lens
barrel in the direction of optical axis, thereby maintaining the rear lens
barrel at a predetermined position so that the second projection lens
group is not deviated from the optical axis.