Patent ID: 7876348

Claim:
A laser scanning unit for a laser printer, comprising: a frame connected to a casing; an optical system module installed on the frame directly for generating laser beams according to print data; an optical scanning module fixed on the frame for reflecting the laser beams generated by the optical system module; a curved lens for reflecting the laser beams reflected from the optical scanning module; and a reflector module installed on the frame directly for reflecting the laser beams reflected from the curved lens to an organic photo conductor, wherein the reflector module has: a reflector chassis; a reflector installed on the reflector chassis for reflecting the laser beams transmitted from the optical scanning module to the organic photo conductor; and an adjustment mechanism for adjusting an angular position of the reflector, wherein the adjustment mechanism has: a flexible container connected to the reflector chassis, the reflector leaned on the flexible container; and a fine-tuning screw having a first portion installed inside an aperture of the flexible container, and a second portion with gradually increasing diameters for pushing against the flexible container and squeezing the flexible container so as to fine-tune the angular position of the reflector.