Optical component fixing structure and projector

A projector, comprising a body, and a light source system, an optical component fixing structure, a light valve and a projecting lens being accommodated and fixed in the body, wherein:

• the light source system provides a beam;
• the light valve converts the beam into an image beam;
• the projecting lens projects the image beam;
• and
• the optical component fixing structure is configured to fix a lens, the optical component fixing structure comprises a bearer and at least two clamping pieces, wherein:
• the bearer has an accommodating opening, at least two sliding trenches and at least two protuberances, the protuberance is disposed in the sliding trench and the sliding trench has a thickness and a first width;
• and
• each of the clamping pieces has two sidewalls, a vertical wall connected between the two sidewalls and a retaining hole formed in the sidewall, a distance between the two sidewalls is matched with the thickness of the sliding trench, and second widths of the two sidewalls are matched with the first width of the sliding trench,
• wherein after the clamping piece is moved into the sliding trench, the protuberance is engaged with the retaining hole and at least one of the two sidewalls covers portion of the accommodating opening,
• wherein the lens is configured to be placed in the accommodating opening,
• wherein the at least one of two sidewalls comprises at least one pressing portion configured to press against the lens,
• wherein the at least one pressing portion and the protuberance are positioned at opposite sides of the bearer.