Patent ID: 7828449

Claim:
An adjusting mechanism, suitable for an optical engine having an engine base, a light integration rod module and a rod holder flat spring fixed on the engine base, wherein the engine base has a first side wall and a second side wall adjacent to the first side wall, the rod holder flat spring has a third side wall and a fourth side wall adjacent to the third side wall, the first side wall, the second side wall, the third side wall and the fourth side wall form an accommodating space for receiving the light integration rod module, and a first spring portion and a second spring portion are respectively disposed on the third side wall and the fourth side wall, the adjusting mechanism comprising: a first adjusting unit, passing through the first side wall of the engine base and adjustably pushing the light integration rod module to adjust the relative position between the light integration rod module and the rod holder flat spring in a first axis; and a second adjusting unit for adjusting the relative position between the light integration rod module and the rod holder flat spring in a second axis substantially perpendicular to the first axis, the second adjusting unit comprising: a fixed base, fixed on the engine base and having a first position-limiting groove and a second position-limiting groove connected to the first position-limiting groove; a first wedge block, slideably disposed in the first position-limiting groove of the fixed base and capable of moving along the first axis; and a second wedge block, slideably disposed in the fixed base, wherein the first wedge block is adapted for pushing the second wedge block to move in the second position-limiting groove along the second axis, and the second wedge block is adapted for pushing the light integration rod module so as to adjust the relative position between the light integration rod module and the rod holder flat spring in the second axis.