Laser beam optical scanning device

#1. Field of the Invention

#The present invention relates to a laser beam optical scanning device, and more specifically relates to a laser beam optical scanning device which deflection scans a unidirectional laser beam emitted from a light source within a single plane by a deflection assembly, so as to write an image on the surface of a photosensitive member.

#2. Description of the Related Art

#These and other objects, advantages and features of the invention will become apparent from the following description thereof taken in conjunction with the accompanying drawings which illustrate specific embodiments of the invention.

#In the following description, like parts are designated by like reference numbers throughout the several drawings.

#FIG. 1 is a section view briefly showing the construction of a laser printer;

#The preferred embodiments of the laser beam optical scanning device of the present invention are described hereinafter with reference to the accompanying drawings. The embodiments below described the present invention in terms of a print head for a laser printer.

#In FIG. 1, the laser printer incorporates within a frame 101 of the main body a print head 1, sheet accommodating section 110, image forming cartridge 120, fixing device 130 and the like. At the top of the frame 101 of the main body is provided a cover 102 supported by a pin 103 so as to be openable in an upward direction. The cover 102 functions as a printed sheet discharge tray during printing operations, and when in the upwardly open state allows maintenance and adjustment access to the interior of the apparatus.

#Paper sheets are stacked in the accommodating section 110, and fed therefrom one sheet at a time via the rotation of a take-up roller 111. The fed paper sheet is transported to the paper path of the image forming cartridge 120.